US3482251A - Transceive and tracking antenna horn array - Google Patents
Transceive and tracking antenna horn array Download PDFInfo
- Publication number
- US3482251A US3482251A US639747A US3482251DA US3482251A US 3482251 A US3482251 A US 3482251A US 639747 A US639747 A US 639747A US 3482251D A US3482251D A US 3482251DA US 3482251 A US3482251 A US 3482251A
- Authority
- US
- United States
- Prior art keywords
- horn
- horns
- tracking
- array
- center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/02—Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns
Definitions
- This invention relates to antennas and more particularly to an array of antenna horns for performing transmit/ receive (transceive) and tracking functions.
- transceive and tracking antenna systems In order to communicate with a satellite from a ground station, a transceive antenna system is required for prime communications, and a tracking antenna system is required in order to obtain direction-related signals to enable any misorientation of the antenna with the satellite to be corrected.
- transceive and tracking antenna systems have used a rectangular center horn for transmitting and receiving the main communication signal to and from the satellite and four outer tracking horns spaced around the center horn for providing four different versions of the signal for tracking purposes.
- Appropriate antenna reflectors were provided to focus the received signal into a concentrated beam directed at the center horn, with a portion of the less-concentrated part of the received signal surrounding the concentrated beam being collected by the outer horns.
- Representative horn arrays of the above type are shown in US. Patents 2,929,- 056 to Page (Mar. 15, 1960) and 3,045,238 to Cheston (July 17, 1962).
- the horn array of the present invention overcomes the disadvantages of the aforenoted prior art arrangements. Accordingly several objects of the present invention are: (1) to provide an antenna horn array which has an improved radiation pattern with smaller sidelobes than prior art arrangements, (2) to provide a horn array in which a maximum of the less-concentrated part received signal surrounding the focused beam thereof is collected and 3,482,251 Patented Dec.
- a transceive and tracking antenna horn array utilizes a conical center horn surrounded by four adjacent square outer horns, each of which has a sector removed so that the four outer horns can closely surround the center horn.
- Each of the four outer horns has a dielectric plate fitted diagonally between opposing corners thereof in order to provide electrical compensation for the removed sector thereof.
- FIG. 1 shows a perspective front view of the antenna horn array of the invention
- FIG. 2 shows a perspective rear view thereof
- FIG, 3 shows a front view thereof.
- the transceive and tracking antenna horn array of their invention comprises a circular conical center horn 10 having a relatively small apex portion 10a and a relatively large flared portion 10b.
- Surrounding the center horn are four outer tracking horns 16, 18, 20 and 22, each of which has a relatively small square apex portion, such as portion 20a of horn 20, and a relatively large flared portion, such as portion 20b of horn 20.
- the flared portions are not completely square but have an arcuate sector in lieu of one corner thereof in order to accomodate the flared portion 10b of the circular center horn.
- the four tracking horns and the center horn may be formed individually and then may be assembled so that the four tracking horns adjoin or lie closely to each other and the center horn at their forward or flared ends.
- the outer walls of the tracking horns will thus define an outer square and their arcuate segments will define an inner circle which accommodates the center horn.
- the tracking horns can be partially formed without arcuate segments and then attached to the center horn so that the flared end thereof will also serve as the arcuate segments of the tracking horns.
- the outer or full walls of the tracking horns are perpendicular to the front plane formed by the flared ends of all five horns.
- the inner or partial walls of the tracking horns are not perpendicular to said front plane but are angled as shown to produce the taper of the tracking horns.
- the inner walls of adjacent horns desirably abut one another as shown so as to define four segments, such as segment 25, which perpendicularly connect the outer square defined by the outside walls of the outer horns with the outside surface of the center horn.
- Coupled to the rear or apex end of each of the outer horns are four circular-to-linear polarization converters 26, 28, 30 and 32 which may be of conventional form.
- Tracking circuitry (not shown) is coupled to the outputs of the polarization converters.
- each of the dielectric compensating plates 34, 36, 38 and 40 are fitted within the outer horns. As shown in the cutaway VieWs of horn 18 in FIGS. 1 and 2, each of the dielectric compensating plates extends between the diagonally opposite corners of its respective outer horn and runs along it respective horn from the flared portion to the point where the arcuate segment vanishes from a cross section to form a square horn cross section. To provide good matching between the horns and the polarization converters, each of the dielectric compensating plates has a pointed section, such as section 36a of plate 36, which extends through the end of the arcuate portion into the square portions of these horns. Each of the dielectric compensating plates should have a dielectric constant of from 2 to 3. Dielectric materials suitable for this purpose are those sold under the trade names Rexolite and Plexiglas.
- the dimensions of the center and outer horns are governed in the usual fashion in inverse proportion to the frequencies of the transmitted and received signals.
- the signal transmitted through the center horn ranged from 7.9 to 8.4- gHz.
- the signal received by the center horn and the four outer horns ranged from 7.25 to 7.75 gHz.
- the dimensions of each side of the flared portion of each outer horn was about 3 inches.
- the outer square had a dimension of about six inches on a side.
- the dimension of a side of the flared portion of each outer horn was about 12 inches.
- One suitable arrangement for this purpose utilizes an orthogonal mode transducer coupled to the end of the apex portion 10a.
- One output of the orthogonal transducer is coupled to one terminal of a 90 hybrid section via a 90 twist waveguide section and the other output of the orthogonal mode transducer is coupled to another terminal of the 90 hybrid section via a phase adjusting waveguide section.
- One end of a transmit waveguide is coupled to a third terminal of the 90 hybrid section via a received signal frequency rejecting filter, and one end of a receive waveguide is coupled to the fourth terminal of the 90 hybrid section via a transmit signal frequency rejecting filter.
- the other ends of the transmit and receive waveguides are coupled to a transmitter and a receiver, respectively.
- the signals received by the tracking horns, after translation through the polarization converters 26, 28, 30 and 32, are coupled to error signal circuitry (not shown) which generates horizontal and vertical error signals for driving positioning controls which correct the orientation of the antenna with respect to the satellite.
- error signal circuitry (not shown) which generates horizontal and vertical error signals for driving positioning controls which correct the orientation of the antenna with respect to the satellite.
- a vertical error signal was synthesized by subtracting the sum of the output signals from horns 16 and 18 from the sum of the signals from horns 20 and 22.
- a horizontal error signal was synthesized by subtracting the sum of the signals from horns 16 and 22 from the sum of the signals from horns 18 and 20.
- the most advantageous antenna reflector arrangement for the horn array is a Cassegranian system (such as shown in FIG. 25-10 on p. 25-12 of the Antenna Engineering Handbook, by Jasik, McGraw-Hill, 1961) in which the signals travel from the horn array to the satellite (and vice versa) via a hyperboloid subrefiector and a circular paraboloid main reflector.
- the orientation of the entire assembly, including the horn array, subreflector, and main reflector, will be aimed at the satellite by means of a servomechanism arrangement which is driven by the aforementioned vertical and horizontal error signals.
- the transmitted and received signals are supplied through the center horn ring in a circular polarization mode in convention fashion. Since the center horn is circular, it will produce smaller sidelobes than a rectangular center horn and accordingly less scattering will result, providing more eflicient transmission and reception.
- the received signal will be focused into the flared end 10b of the center horn.
- a less-concentrated part of the received signal surrounding the focused beam will be collected by the four outer tracking horns.
- the amount of signal collected by each tracking horn will be equal when the array is aimed correctly and unequal when the array is not aimed correctly.
- an appropriate error signal will be produced which will cause the orientation of the array to be corrected, as aforenoted.
- each outer horn which accommodates the center horn is com pensated for electrically by the presence of a respective one of the dielectric compensating plates 34, 36, 38 and 40'.
- Each dielectric plate delays the component of the electric field in its tracing horn which is parallel to the dielectric plate. This component of the electric field has a higher than normal phase velocity as a result of the removed sector and the dielectric plate provides a compensating delay.
- the dielectric plates thereby allow the outer tracking horns to operate with any sense of linear or circular polarization. Thus the tracking function can be effected accurately.
- a transceive and tracking antenna horn array comprising:
- each outer horn having a small rear end and a relatively large front end, the front end of each horn having a partially rectangular cross Section defined by first and second mutually perpendicular outer walls which meet at a first corner, a first inner wall perpendicular to and abutting said first outer wall to form a second comer, a second inner walll perpendicular to and abutting said second outer wall to form a third corner, and a tapered arcuate inner wall joining said first and second inner walls, said tapered arcuate inner walls of said four outer horns together defining an opening generally conforming to the front end of said center horn, and
- each of said outer horns has a square cross section, except for said arcuate inner wall thereof, and the two outer walls of each of said outer horns are perpendicular to the front surface of said array and are planar from said front to said rear ends thereof.
- each of said compensating plates has a dielectric constant from 2 to 3 and extends from the front to the end of its arcuate segment of its respective horn along said second and third corners thereof.
- a transceive and tracking antenna horn assembly comprising:
- each of said compensating plates has a dielectric constant from 2 to 3 and extends along its respective horn from the start of the arcuate portion to the flared portion thereof.
Landscapes
- Waveguide Aerials (AREA)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
Dec. 2, 1969 J. D- Bowris, JR
Filed May 19, 1967 Rm m F MW 5 D M d WWW ATTORNEY United States Patent M 3,482,251 TRANSCEIVE AND TRACKING ANTENNA HORN ARRAY John D. Bowes, Jr., Mountain View, Calif., assignor to Philco-Ford Corporation, Philadelphia, Pa., 21 corporation of Delaware Filed May 19, 1967, Ser. No. 639,747 Int. Cl. H01q 13/02 US. Cl. 343-776 Claims ABSTRACT OF THE DISCLOSURE Transceive and tracking antenna horn array utilizing circular center horn surrounded by four adjacent square outer tracking horns, each outer horn having a sector removed to accommodate center horn and each outer horn containing a diagonal dielectric plate to compensate for removed sector.
This invention relates to antennas and more particularly to an array of antenna horns for performing transmit/ receive (transceive) and tracking functions.
In order to communicate with a satellite from a ground station, a transceive antenna system is required for prime communications, and a tracking antenna system is required in order to obtain direction-related signals to enable any misorientation of the antenna with the satellite to be corrected. Heretofore, transceive and tracking antenna systems have used a rectangular center horn for transmitting and receiving the main communication signal to and from the satellite and four outer tracking horns spaced around the center horn for providing four different versions of the signal for tracking purposes. Appropriate antenna reflectors were provided to focus the received signal into a concentrated beam directed at the center horn, with a portion of the less-concentrated part of the received signal surrounding the concentrated beam being collected by the outer horns. Representative horn arrays of the above type are shown in US. Patents 2,929,- 056 to Page (Mar. 15, 1960) and 3,045,238 to Cheston (July 17, 1962).
Prior art horn arrays of the above type had various difiiculties associated therewith, namely: (1) the radiated signal pattern had large sidelobes, resulting in transmitted signal loss and low received signal-to-noise ratio, (2) empty spaces around the center horn caused a partial loss of the less-concentrated part of the received signal, thereby decreasing tracking efliciency, and (3) the centers of phases of the outer horns were relatively widely spaced from each other, which also resulted in ineflicient tracking.
Arrangements have also been proposed, as typified in Patent 2,677,055 to Allen (Mar. 27, 1954), in which the transceive and tracking antenna horn array consists of four adjacent rectangular outer horns surrounding a circular center horn. However these arrangements, while eliminating some of the difiiculties of the aforementioned arrays, suffered from the inability to couple and receive a large amount of signal energy efiiciently through the center horn. In addition, they were unable to track accurately because the outer horns were unable to receive a circularly polarized signal due to the presence of the removed sector which accommodated the center horn.
The horn array of the present invention overcomes the disadvantages of the aforenoted prior art arrangements. Accordingly several objects of the present invention are: (1) to provide an antenna horn array which has an improved radiation pattern with smaller sidelobes than prior art arrangements, (2) to provide a horn array in which a maximum of the less-concentrated part received signal surrounding the focused beam thereof is collected and 3,482,251 Patented Dec. 2, 1969 utilized by the outer tracking horns, (3) to provide such an arrangement in which the centers of phases of the tracking horns are closely spaced, thereby resulting in improved tracking, (4) to provide such an arrangement in which large amounts of power can be transceived efliciently by a center horn, and (5) to provide such an arrangement in which the outer tracking horns can receive a circularly polarized signal. Other objects and advantages of the present invention will become apparent from a consideration of the following description thereof.
SUMMARY According to the present invention a transceive and tracking antenna horn array utilizes a conical center horn surrounded by four adjacent square outer horns, each of which has a sector removed so that the four outer horns can closely surround the center horn. Each of the four outer horns has a dielectric plate fitted diagonally between opposing corners thereof in order to provide electrical compensation for the removed sector thereof.
DRAWINGS FIG. 1 shows a perspective front view of the antenna horn array of the invention, FIG. 2 shows a perspective rear view thereof, and FIG, 3 shows a front view thereof.
DESCRIPTION As shown in the three views thereof, the transceive and tracking antenna horn array of their invention comprises a circular conical center horn 10 having a relatively small apex portion 10a and a relatively large flared portion 10b. Surrounding the center horn are four outer tracking horns 16, 18, 20 and 22, each of which has a relatively small square apex portion, such as portion 20a of horn 20, and a relatively large flared portion, such as portion 20b of horn 20. The flared portions are not completely square but have an arcuate sector in lieu of one corner thereof in order to accomodate the flared portion 10b of the circular center horn. The four tracking horns and the center horn may be formed individually and then may be assembled so that the four tracking horns adjoin or lie closely to each other and the center horn at their forward or flared ends. The outer walls of the tracking horns will thus define an outer square and their arcuate segments will define an inner circle which accommodates the center horn. Alternatively the tracking horns can be partially formed without arcuate segments and then attached to the center horn so that the flared end thereof will also serve as the arcuate segments of the tracking horns. The outer or full walls of the tracking horns are perpendicular to the front plane formed by the flared ends of all five horns. The inner or partial walls of the tracking horns, such as wall 24, are not perpendicular to said front plane but are angled as shown to produce the taper of the tracking horns. At the front of the array the inner walls of adjacent horns desirably abut one another as shown so as to define four segments, such as segment 25, which perpendicularly connect the outer square defined by the outside walls of the outer horns with the outside surface of the center horn. Coupled to the rear or apex end of each of the outer horns are four circular-to- linear polarization converters 26, 28, 30 and 32 which may be of conventional form. Tracking circuitry (not shown) is coupled to the outputs of the polarization converters.
According to the invention, four dielectric compensating plates 34, 36, 38 and 40 are fitted within the outer horns. As shown in the cutaway VieWs of horn 18 in FIGS. 1 and 2, each of the dielectric compensating plates extends between the diagonally opposite corners of its respective outer horn and runs along it respective horn from the flared portion to the point where the arcuate segment vanishes from a cross section to form a square horn cross section. To provide good matching between the horns and the polarization converters, each of the dielectric compensating plates has a pointed section, such as section 36a of plate 36, which extends through the end of the arcuate portion into the square portions of these horns. Each of the dielectric compensating plates should have a dielectric constant of from 2 to 3. Dielectric materials suitable for this purpose are those sold under the trade names Rexolite and Plexiglas.
The dimensions of the center and outer horns are governed in the usual fashion in inverse proportion to the frequencies of the transmitted and received signals. In one operational embodiment of the invention the signal transmitted through the center horn ranged from 7.9 to 8.4- gHz. and the signal received by the center horn and the four outer horns ranged from 7.25 to 7.75 gHz. In this embodiment the dimensions of each side of the flared portion of each outer horn was about 3 inches. Thus the outer square had a dimension of about six inches on a side. In another embodiment of the invention wherein the transmitted and received signals were on the order of 3-4 gHz., the dimension of a side of the flared portion of each outer horn was about 12 inches.
Since the transmitted and received signals are both supplied and received at the apex portion a of the center horn, it is necessary to separate these signals and couple them to separate transmit and receive waveguides (not shown) so that they can be processed by a transmitter and a receiver (not shown). One suitable arrangement for this purpose utilizes an orthogonal mode transducer coupled to the end of the apex portion 10a. One output of the orthogonal transducer is coupled to one terminal of a 90 hybrid section via a 90 twist waveguide section and the other output of the orthogonal mode transducer is coupled to another terminal of the 90 hybrid section via a phase adjusting waveguide section. One end of a transmit waveguide is coupled to a third terminal of the 90 hybrid section via a received signal frequency rejecting filter, and one end of a receive waveguide is coupled to the fourth terminal of the 90 hybrid section via a transmit signal frequency rejecting filter. The other ends of the transmit and receive waveguides are coupled to a transmitter and a receiver, respectively.
The signals received by the tracking horns, after translation through the polarization converters 26, 28, 30 and 32, are coupled to error signal circuitry (not shown) which generates horizontal and vertical error signals for driving positioning controls which correct the orientation of the antenna with respect to the satellite. In one embodiment a vertical error signal was synthesized by subtracting the sum of the output signals from horns 16 and 18 from the sum of the signals from horns 20 and 22. A horizontal error signal was synthesized by subtracting the sum of the signals from horns 16 and 22 from the sum of the signals from horns 18 and 20.
The most advantageous antenna reflector arrangement for the horn array is a Cassegranian system (such as shown in FIG. 25-10 on p. 25-12 of the Antenna Engineering Handbook, by Jasik, McGraw-Hill, 1961) in which the signals travel from the horn array to the satellite (and vice versa) via a hyperboloid subrefiector and a circular paraboloid main reflector. The orientation of the entire assembly, including the horn array, subreflector, and main reflector, will be aimed at the satellite by means of a servomechanism arrangement which is driven by the aforementioned vertical and horizontal error signals.
OPERATION In operation, the transmitted and received signals are supplied through the center horn ring in a circular polarization mode in convention fashion. Since the center horn is circular, it will produce smaller sidelobes than a rectangular center horn and accordingly less scattering will result, providing more eflicient transmission and reception.
As stated, the received signal will be focused into the flared end 10b of the center horn. A less-concentrated part of the received signal surrounding the focused beam will be collected by the four outer tracking horns. The amount of signal collected by each tracking horn will be equal when the array is aimed correctly and unequal when the array is not aimed correctly. When the array is aimed incorrectly an appropriate error signal will be produced which will cause the orientation of the array to be corrected, as aforenoted.
Since the four outer horns completely surround the center horn without leaving any vacant space around the outside of the center horn, a maximum amount of the less-concentrated part of the signal surrounding the focused beam will be captured by the outer horns, thereby supplying a maximum amount of signal to the tracking circuitry, so that high tracking efficiency results. Tracking will also be aided because the tight packing of the outer horns around the center horn will cause the centers of the phases of the outer horns to be closely spaced.
According to the invention, the arcuate sector of each outer horn which accommodates the center horn is com pensated for electrically by the presence of a respective one of the dielectric compensating plates 34, 36, 38 and 40'. Each dielectric plate delays the component of the electric field in its tracing horn which is parallel to the dielectric plate. This component of the electric field has a higher than normal phase velocity as a result of the removed sector and the dielectric plate provides a compensating delay. The dielectric plates thereby allow the outer tracking horns to operate with any sense of linear or circular polarization. Thus the tracking function can be effected accurately.
While there has been described what is at present considered to be the preferred embodiment of the invention it will be apparent that various modifications and other embodiments thereof will occur to those skilled in the art within the scope of the invention. Accordingly, it is desired that the scope of the invention be limited by the appended claims only.
I claim:
1. A transceive and tracking antenna horn array, comprising:
(a) a conical center horn having a circular rear end of relatively small diameter and a circular front end of relatively large diameter,
(b) four outer horns positioned around said center horn, each outer horn having a small rear end and a relatively large front end, the front end of each horn having a partially rectangular cross Section defined by first and second mutually perpendicular outer walls which meet at a first corner, a first inner wall perpendicular to and abutting said first outer wall to form a second comer, a second inner walll perpendicular to and abutting said second outer wall to form a third corner, and a tapered arcuate inner wall joining said first and second inner walls, said tapered arcuate inner walls of said four outer horns together defining an opening generally conforming to the front end of said center horn, and
(c) four dielectric compensating plates, each positioned in one of said outer horns and extending from the second to the third corners thereof.
2. The array of claim 1 wherein a circular-to-linear polarization converter is coupled to the rear end of each of said outer horns.
3. The array of claim 1 in which said inner walls of said outer horns abut the outside surface of said center horn and abut each other in four pairs so that the front ends of said outer walls of said outer horns form a rectangle with the abutting ends of said inner walls forming four segments, each perpendicularly connecting said outer rectangle to said inner horn.
4. The array of claim 1 wherein the front surface formed by the front ends of said center horn and said four outer horns is planar, each of said outer horns has a square cross section, except for said arcuate inner wall thereof, and the two outer walls of each of said outer horns are perpendicular to the front surface of said array and are planar from said front to said rear ends thereof.
5. The array of claim 1 wherein each of said compensating plates has a dielectric constant from 2 to 3 and extends from the front to the end of its arcuate segment of its respective horn along said second and third corners thereof.
6. A transceive and tracking antenna horn assembly, comprising:
(a) four outer rectangular horns, each having a relatively small apex portion and a relatively large flared portion, each of said flared portions having an arcuate sector in lieu of one corner thereof, said four horns being positioned so that the four arcuate sec tors generally define a circular opening surrounded by said four horns with the outside surfaces of said four horns generally defining a rectangle.
(b) a circular center horn having a relatively small apex portion and a relatively large flared portion, said flared portion being positioned in said circular opening, and
(c) four dielectric compensating plates, each extending across a respective one of said outer horns between the diagonally-opposite corners thereof.
7. The array of claim 6 wherein said center horn and said outer horns are joined together in a unitary structure with the arcuate sectors of said outer horns and the flared portion of said center horn being unitary.
8. The array of claim 6 wherein a circular-to-linear polarization converter is coupled to the apex ends of each of said four outer horns.
9. The array of claim 6 wherein the apex ends of said four outer horns are square and the flared ends thereof are square, except for said arcuate sectors, whereby the outside surfaces of said outer horns generally define a square.
10. The array of claim 6 wherein each of said compensating plates has a dielectric constant from 2 to 3 and extends along its respective horn from the start of the arcuate portion to the flared portion thereof.
References Cited UNITED STATES PATENTS 2,425,488 8/1947 Peterson et al 343-776 ELI LIEBERMAN, Primary Examiner U.S. Cl. X.R. 343-785, 786
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US63974767A | 1967-05-19 | 1967-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3482251A true US3482251A (en) | 1969-12-02 |
Family
ID=24565382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US639747A Expired - Lifetime US3482251A (en) | 1967-05-19 | 1967-05-19 | Transceive and tracking antenna horn array |
Country Status (3)
Country | Link |
---|---|
US (1) | US3482251A (en) |
DE (1) | DE1766377B1 (en) |
GB (1) | GB1190888A (en) |
Cited By (135)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3568204A (en) * | 1969-04-29 | 1971-03-02 | Sylvania Electric Prod | Multimode antenna feed system having a plurality of tracking elements mounted symmetrically about the inner walls and at the aperture end of a scalar horn |
US3633208A (en) * | 1968-10-28 | 1972-01-04 | Hughes Aircraft Co | Shaped-beam antenna for earth coverage from a stabilized satellite |
US4096482A (en) * | 1977-04-21 | 1978-06-20 | Control Data Corporation | Wide band monopulse antennas with control circuitry |
US4112432A (en) * | 1976-10-21 | 1978-09-05 | Hughes Aircraft Company | Square horn antenna having improved ellipticity |
US4633264A (en) * | 1983-02-17 | 1986-12-30 | General Research Of Electronics, Inc. | Horn antenna |
US4712110A (en) * | 1985-12-26 | 1987-12-08 | General Dynamics, Pomona Division | Five-port monopulse antenna feed structure with one dedicated transmit port |
US5036336A (en) * | 1988-10-28 | 1991-07-30 | Thomson-Csf | System for the integration of I.F.F. sum and difference channels in a radar surveillance antenna |
US5113197A (en) * | 1989-12-28 | 1992-05-12 | Space Systems/Loral, Inc. | Conformal aperture feed array for a multiple beam antenna |
WO1996004693A1 (en) * | 1994-07-28 | 1996-02-15 | Trulstech Innovation Handelsbolag | A feeder horn, intended particularly for two-way satellite communications equipment |
US5640168A (en) * | 1995-08-11 | 1997-06-17 | Zircon Corporation | Ultra wide-band radar antenna for concrete penetration |
US6388635B1 (en) * | 1998-11-25 | 2002-05-14 | C2Sat Communications Ab | Feeder horn, intended especially for two-way satellite communication |
US6501434B1 (en) * | 2001-11-15 | 2002-12-31 | Space Systems/Loral, Inc. | Multi-band corrugated antenna feed horn with a hexagonal aperture and antenna array using same |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US9674711B2 (en) | 2013-11-06 | 2017-06-06 | At&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
US9685992B2 (en) | 2014-10-03 | 2017-06-20 | At&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US9705610B2 (en) | 2014-10-21 | 2017-07-11 | At&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US9742521B2 (en) | 2014-11-20 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
US9749013B2 (en) | 2015-03-17 | 2017-08-29 | At&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
US9749053B2 (en) | 2015-07-23 | 2017-08-29 | At&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
US9769128B2 (en) | 2015-09-28 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
US9768833B2 (en) | 2014-09-15 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9787412B2 (en) | 2015-06-25 | 2017-10-10 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US9793951B2 (en) | 2015-07-15 | 2017-10-17 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9793954B2 (en) | 2015-04-28 | 2017-10-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
US9793955B2 (en) | 2015-04-24 | 2017-10-17 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9800327B2 (en) | 2014-11-20 | 2017-10-24 | At&T Intellectual Property I, L.P. | Apparatus for controlling operations of a communication device and methods thereof |
US9820146B2 (en) | 2015-06-12 | 2017-11-14 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US9838078B2 (en) | 2015-07-31 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9847850B2 (en) | 2014-10-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US9866276B2 (en) | 2014-10-10 | 2018-01-09 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US9871558B2 (en) | 2014-10-21 | 2018-01-16 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9876571B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US9887447B2 (en) | 2015-05-14 | 2018-02-06 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US9906269B2 (en) | 2014-09-17 | 2018-02-27 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9912033B2 (en) | 2014-10-21 | 2018-03-06 | At&T Intellectual Property I, Lp | Guided wave coupler, coupling module and methods for use therewith |
US9912382B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9913139B2 (en) | 2015-06-09 | 2018-03-06 | At&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US9929755B2 (en) | 2015-07-14 | 2018-03-27 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9954286B2 (en) | 2014-10-21 | 2018-04-24 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9973416B2 (en) | 2014-10-02 | 2018-05-15 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US9991580B2 (en) | 2016-10-21 | 2018-06-05 | At&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
US9998870B1 (en) | 2016-12-08 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus for proximity sensing |
US9999038B2 (en) | 2013-05-31 | 2018-06-12 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10051630B2 (en) | 2013-05-31 | 2018-08-14 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US10069185B2 (en) | 2015-06-25 | 2018-09-04 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US10090606B2 (en) | 2015-07-15 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
US10090594B2 (en) | 2016-11-23 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
US10139820B2 (en) | 2016-12-07 | 2018-11-27 | At&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10298293B2 (en) | 2017-03-13 | 2019-05-21 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
US10297917B2 (en) * | 2016-09-06 | 2019-05-21 | Aeroantenna Technology, Inc. | Dual KA band compact high efficiency CP antenna cluster with dual band compact diplexer-polarizers for aeronautical satellite communications |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10547348B2 (en) | 2016-12-07 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for switching transmission mediums in a communication system |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US10637149B2 (en) | 2016-12-06 | 2020-04-28 | At&T Intellectual Property I, L.P. | Injection molded dielectric antenna and methods for use therewith |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10797781B2 (en) | 2015-06-03 | 2020-10-06 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2278731B (en) * | 1993-06-02 | 1997-04-23 | Marconi Gec Ltd | Monopulse radar system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2425488A (en) * | 1943-07-03 | 1947-08-12 | Rca Corp | Horn antenna |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2677055A (en) * | 1949-10-06 | 1954-04-27 | Philip J Allen | Multiple-lobe antenna assembly |
-
1967
- 1967-05-19 US US639747A patent/US3482251A/en not_active Expired - Lifetime
-
1968
- 1968-05-10 DE DE19681766377 patent/DE1766377B1/en not_active Withdrawn
- 1968-05-17 GB GB23707/68A patent/GB1190888A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2425488A (en) * | 1943-07-03 | 1947-08-12 | Rca Corp | Horn antenna |
Cited By (149)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3633208A (en) * | 1968-10-28 | 1972-01-04 | Hughes Aircraft Co | Shaped-beam antenna for earth coverage from a stabilized satellite |
US3568204A (en) * | 1969-04-29 | 1971-03-02 | Sylvania Electric Prod | Multimode antenna feed system having a plurality of tracking elements mounted symmetrically about the inner walls and at the aperture end of a scalar horn |
US4112432A (en) * | 1976-10-21 | 1978-09-05 | Hughes Aircraft Company | Square horn antenna having improved ellipticity |
US4096482A (en) * | 1977-04-21 | 1978-06-20 | Control Data Corporation | Wide band monopulse antennas with control circuitry |
US4633264A (en) * | 1983-02-17 | 1986-12-30 | General Research Of Electronics, Inc. | Horn antenna |
US4712110A (en) * | 1985-12-26 | 1987-12-08 | General Dynamics, Pomona Division | Five-port monopulse antenna feed structure with one dedicated transmit port |
US5036336A (en) * | 1988-10-28 | 1991-07-30 | Thomson-Csf | System for the integration of I.F.F. sum and difference channels in a radar surveillance antenna |
US5113197A (en) * | 1989-12-28 | 1992-05-12 | Space Systems/Loral, Inc. | Conformal aperture feed array for a multiple beam antenna |
US5874923A (en) * | 1994-07-28 | 1999-02-23 | Trulstech Innovation Handelsbolag | Feeder horn, intended particularly for two-way satellite communications equipment |
WO1996004693A1 (en) * | 1994-07-28 | 1996-02-15 | Trulstech Innovation Handelsbolag | A feeder horn, intended particularly for two-way satellite communications equipment |
US5640168A (en) * | 1995-08-11 | 1997-06-17 | Zircon Corporation | Ultra wide-band radar antenna for concrete penetration |
US6388635B1 (en) * | 1998-11-25 | 2002-05-14 | C2Sat Communications Ab | Feeder horn, intended especially for two-way satellite communication |
US6501434B1 (en) * | 2001-11-15 | 2002-12-31 | Space Systems/Loral, Inc. | Multi-band corrugated antenna feed horn with a hexagonal aperture and antenna array using same |
US10051630B2 (en) | 2013-05-31 | 2018-08-14 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9999038B2 (en) | 2013-05-31 | 2018-06-12 | At&T Intellectual Property I, L.P. | Remote distributed antenna system |
US9674711B2 (en) | 2013-11-06 | 2017-06-06 | At&T Intellectual Property I, L.P. | Surface-wave communications and methods thereof |
US9768833B2 (en) | 2014-09-15 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves |
US10063280B2 (en) | 2014-09-17 | 2018-08-28 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9906269B2 (en) | 2014-09-17 | 2018-02-27 | At&T Intellectual Property I, L.P. | Monitoring and mitigating conditions in a communication network |
US9973416B2 (en) | 2014-10-02 | 2018-05-15 | At&T Intellectual Property I, L.P. | Method and apparatus that provides fault tolerance in a communication network |
US9685992B2 (en) | 2014-10-03 | 2017-06-20 | At&T Intellectual Property I, L.P. | Circuit panel network and methods thereof |
US9866276B2 (en) | 2014-10-10 | 2018-01-09 | At&T Intellectual Property I, L.P. | Method and apparatus for arranging communication sessions in a communication system |
US9847850B2 (en) | 2014-10-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a mode of communication in a communication network |
US9769020B2 (en) | 2014-10-21 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for responding to events affecting communications in a communication network |
US9780834B2 (en) | 2014-10-21 | 2017-10-03 | At&T Intellectual Property I, L.P. | Method and apparatus for transmitting electromagnetic waves |
US9960808B2 (en) | 2014-10-21 | 2018-05-01 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9876587B2 (en) | 2014-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
US9871558B2 (en) | 2014-10-21 | 2018-01-16 | At&T Intellectual Property I, L.P. | Guided-wave transmission device and methods for use therewith |
US9954286B2 (en) | 2014-10-21 | 2018-04-24 | At&T Intellectual Property I, L.P. | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9912033B2 (en) | 2014-10-21 | 2018-03-06 | At&T Intellectual Property I, Lp | Guided wave coupler, coupling module and methods for use therewith |
US9705610B2 (en) | 2014-10-21 | 2017-07-11 | At&T Intellectual Property I, L.P. | Transmission device with impairment compensation and methods for use therewith |
US9742521B2 (en) | 2014-11-20 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9954287B2 (en) | 2014-11-20 | 2018-04-24 | At&T Intellectual Property I, L.P. | Apparatus for converting wireless signals and electromagnetic waves and methods thereof |
US9749083B2 (en) | 2014-11-20 | 2017-08-29 | At&T Intellectual Property I, L.P. | Transmission device with mode division multiplexing and methods for use therewith |
US9800327B2 (en) | 2014-11-20 | 2017-10-24 | At&T Intellectual Property I, L.P. | Apparatus for controlling operations of a communication device and methods thereof |
US10243784B2 (en) | 2014-11-20 | 2019-03-26 | At&T Intellectual Property I, L.P. | System for generating topology information and methods thereof |
US9742462B2 (en) | 2014-12-04 | 2017-08-22 | At&T Intellectual Property I, L.P. | Transmission medium and communication interfaces and methods for use therewith |
US10009067B2 (en) | 2014-12-04 | 2018-06-26 | At&T Intellectual Property I, L.P. | Method and apparatus for configuring a communication interface |
US9876571B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9876570B2 (en) | 2015-02-20 | 2018-01-23 | At&T Intellectual Property I, Lp | Guided-wave transmission device with non-fundamental mode propagation and methods for use therewith |
US9749013B2 (en) | 2015-03-17 | 2017-08-29 | At&T Intellectual Property I, L.P. | Method and apparatus for reducing attenuation of electromagnetic waves guided by a transmission medium |
US9831912B2 (en) | 2015-04-24 | 2017-11-28 | At&T Intellectual Property I, Lp | Directional coupling device and methods for use therewith |
US9793955B2 (en) | 2015-04-24 | 2017-10-17 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US10224981B2 (en) | 2015-04-24 | 2019-03-05 | At&T Intellectual Property I, Lp | Passive electrical coupling device and methods for use therewith |
US9705561B2 (en) | 2015-04-24 | 2017-07-11 | At&T Intellectual Property I, L.P. | Directional coupling device and methods for use therewith |
US9793954B2 (en) | 2015-04-28 | 2017-10-17 | At&T Intellectual Property I, L.P. | Magnetic coupling device and methods for use therewith |
US9748626B2 (en) | 2015-05-14 | 2017-08-29 | At&T Intellectual Property I, L.P. | Plurality of cables having different cross-sectional shapes which are bundled together to form a transmission medium |
US9887447B2 (en) | 2015-05-14 | 2018-02-06 | At&T Intellectual Property I, L.P. | Transmission medium having multiple cores and methods for use therewith |
US9871282B2 (en) | 2015-05-14 | 2018-01-16 | At&T Intellectual Property I, L.P. | At least one transmission medium having a dielectric surface that is covered at least in part by a second dielectric |
US10650940B2 (en) | 2015-05-15 | 2020-05-12 | At&T Intellectual Property I, L.P. | Transmission medium having a conductive material and methods for use therewith |
US9917341B2 (en) | 2015-05-27 | 2018-03-13 | At&T Intellectual Property I, L.P. | Apparatus and method for launching electromagnetic waves and for modifying radial dimensions of the propagating electromagnetic waves |
US10050697B2 (en) | 2015-06-03 | 2018-08-14 | At&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
US9935703B2 (en) | 2015-06-03 | 2018-04-03 | At&T Intellectual Property I, L.P. | Host node device and methods for use therewith |
US9866309B2 (en) | 2015-06-03 | 2018-01-09 | At&T Intellectual Property I, Lp | Host node device and methods for use therewith |
US9967002B2 (en) | 2015-06-03 | 2018-05-08 | At&T Intellectual I, Lp | Network termination and methods for use therewith |
US9912381B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US10797781B2 (en) | 2015-06-03 | 2020-10-06 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US9912382B2 (en) | 2015-06-03 | 2018-03-06 | At&T Intellectual Property I, Lp | Network termination and methods for use therewith |
US10812174B2 (en) | 2015-06-03 | 2020-10-20 | At&T Intellectual Property I, L.P. | Client node device and methods for use therewith |
US9997819B2 (en) | 2015-06-09 | 2018-06-12 | At&T Intellectual Property I, L.P. | Transmission medium and method for facilitating propagation of electromagnetic waves via a core |
US9913139B2 (en) | 2015-06-09 | 2018-03-06 | At&T Intellectual Property I, L.P. | Signal fingerprinting for authentication of communicating devices |
US9820146B2 (en) | 2015-06-12 | 2017-11-14 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9667317B2 (en) | 2015-06-15 | 2017-05-30 | At&T Intellectual Property I, L.P. | Method and apparatus for providing security using network traffic adjustments |
US10069185B2 (en) | 2015-06-25 | 2018-09-04 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a non-fundamental wave mode on a transmission medium |
US9865911B2 (en) | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
US9787412B2 (en) | 2015-06-25 | 2017-10-10 | At&T Intellectual Property I, L.P. | Methods and apparatus for inducing a fundamental wave mode on a transmission medium |
US9882257B2 (en) | 2015-07-14 | 2018-01-30 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US10148016B2 (en) | 2015-07-14 | 2018-12-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array |
US9929755B2 (en) | 2015-07-14 | 2018-03-27 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US9722318B2 (en) | 2015-07-14 | 2017-08-01 | At&T Intellectual Property I, L.P. | Method and apparatus for coupling an antenna to a device |
US10205655B2 (en) | 2015-07-14 | 2019-02-12 | At&T Intellectual Property I, L.P. | Apparatus and methods for communicating utilizing an antenna array and multiple communication paths |
US9853342B2 (en) | 2015-07-14 | 2017-12-26 | At&T Intellectual Property I, L.P. | Dielectric transmission medium connector and methods for use therewith |
US10044409B2 (en) | 2015-07-14 | 2018-08-07 | At&T Intellectual Property I, L.P. | Transmission medium and methods for use therewith |
US10320586B2 (en) | 2015-07-14 | 2019-06-11 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating non-interfering electromagnetic waves on an insulated transmission medium |
US9847566B2 (en) | 2015-07-14 | 2017-12-19 | At&T Intellectual Property I, L.P. | Method and apparatus for adjusting a field of a signal to mitigate interference |
US9793951B2 (en) | 2015-07-15 | 2017-10-17 | At&T Intellectual Property I, L.P. | Method and apparatus for launching a wave mode that mitigates interference |
US10090606B2 (en) | 2015-07-15 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system with dielectric array and methods for use therewith |
US9948333B2 (en) | 2015-07-23 | 2018-04-17 | At&T Intellectual Property I, L.P. | Method and apparatus for wireless communications to mitigate interference |
US9871283B2 (en) | 2015-07-23 | 2018-01-16 | At&T Intellectual Property I, Lp | Transmission medium having a dielectric core comprised of plural members connected by a ball and socket configuration |
US9749053B2 (en) | 2015-07-23 | 2017-08-29 | At&T Intellectual Property I, L.P. | Node device, repeater and methods for use therewith |
US9806818B2 (en) | 2015-07-23 | 2017-10-31 | At&T Intellectual Property I, Lp | Node device, repeater and methods for use therewith |
US9912027B2 (en) | 2015-07-23 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9838078B2 (en) | 2015-07-31 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for exchanging communication signals |
US9735833B2 (en) | 2015-07-31 | 2017-08-15 | At&T Intellectual Property I, L.P. | Method and apparatus for communications management in a neighborhood network |
US9967173B2 (en) | 2015-07-31 | 2018-05-08 | At&T Intellectual Property I, L.P. | Method and apparatus for authentication and identity management of communicating devices |
US9904535B2 (en) | 2015-09-14 | 2018-02-27 | At&T Intellectual Property I, L.P. | Method and apparatus for distributing software |
US9769128B2 (en) | 2015-09-28 | 2017-09-19 | At&T Intellectual Property I, L.P. | Method and apparatus for encryption of communications over a network |
US9729197B2 (en) | 2015-10-01 | 2017-08-08 | At&T Intellectual Property I, L.P. | Method and apparatus for communicating network management traffic over a network |
US9876264B2 (en) | 2015-10-02 | 2018-01-23 | At&T Intellectual Property I, Lp | Communication system, guided wave switch and methods for use therewith |
US10355367B2 (en) | 2015-10-16 | 2019-07-16 | At&T Intellectual Property I, L.P. | Antenna structure for exchanging wireless signals |
US9860075B1 (en) | 2016-08-26 | 2018-01-02 | At&T Intellectual Property I, L.P. | Method and communication node for broadband distribution |
US10297917B2 (en) * | 2016-09-06 | 2019-05-21 | Aeroantenna Technology, Inc. | Dual KA band compact high efficiency CP antenna cluster with dual band compact diplexer-polarizers for aeronautical satellite communications |
US10135146B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via circuits |
US10340600B2 (en) | 2016-10-18 | 2019-07-02 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via plural waveguide systems |
US10135147B2 (en) | 2016-10-18 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching guided waves via an antenna |
US10374316B2 (en) | 2016-10-21 | 2019-08-06 | At&T Intellectual Property I, L.P. | System and dielectric antenna with non-uniform dielectric |
US9991580B2 (en) | 2016-10-21 | 2018-06-05 | At&T Intellectual Property I, L.P. | Launcher and coupling system for guided wave mode cancellation |
US9876605B1 (en) | 2016-10-21 | 2018-01-23 | At&T Intellectual Property I, L.P. | Launcher and coupling system to support desired guided wave mode |
US10811767B2 (en) | 2016-10-21 | 2020-10-20 | At&T Intellectual Property I, L.P. | System and dielectric antenna with convex dielectric radome |
US10312567B2 (en) | 2016-10-26 | 2019-06-04 | At&T Intellectual Property I, L.P. | Launcher with planar strip antenna and methods for use therewith |
US10340573B2 (en) | 2016-10-26 | 2019-07-02 | At&T Intellectual Property I, L.P. | Launcher with cylindrical coupling device and methods for use therewith |
US10225025B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Method and apparatus for detecting a fault in a communication system |
US10291334B2 (en) | 2016-11-03 | 2019-05-14 | At&T Intellectual Property I, L.P. | System for detecting a fault in a communication system |
US10224634B2 (en) | 2016-11-03 | 2019-03-05 | At&T Intellectual Property I, L.P. | Methods and apparatus for adjusting an operational characteristic of an antenna |
US10498044B2 (en) | 2016-11-03 | 2019-12-03 | At&T Intellectual Property I, L.P. | Apparatus for configuring a surface of an antenna |
US10535928B2 (en) | 2016-11-23 | 2020-01-14 | At&T Intellectual Property I, L.P. | Antenna system and methods for use therewith |
US10340603B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Antenna system having shielded structural configurations for assembly |
US10178445B2 (en) | 2016-11-23 | 2019-01-08 | At&T Intellectual Property I, L.P. | Methods, devices, and systems for load balancing between a plurality of waveguides |
US10340601B2 (en) | 2016-11-23 | 2019-07-02 | At&T Intellectual Property I, L.P. | Multi-antenna system and methods for use therewith |
US10090594B2 (en) | 2016-11-23 | 2018-10-02 | At&T Intellectual Property I, L.P. | Antenna system having structural configurations for assembly |
US10305190B2 (en) | 2016-12-01 | 2019-05-28 | At&T Intellectual Property I, L.P. | Reflecting dielectric antenna system and methods for use therewith |
US10361489B2 (en) | 2016-12-01 | 2019-07-23 | At&T Intellectual Property I, L.P. | Dielectric dish antenna system and methods for use therewith |
US10020844B2 (en) | 2016-12-06 | 2018-07-10 | T&T Intellectual Property I, L.P. | Method and apparatus for broadcast communication via guided waves |
US10382976B2 (en) | 2016-12-06 | 2019-08-13 | At&T Intellectual Property I, L.P. | Method and apparatus for managing wireless communications based on communication paths and network device positions |
US10819035B2 (en) | 2016-12-06 | 2020-10-27 | At&T Intellectual Property I, L.P. | Launcher with helical antenna and methods for use therewith |
US10326494B2 (en) | 2016-12-06 | 2019-06-18 | At&T Intellectual Property I, L.P. | Apparatus for measurement de-embedding and methods for use therewith |
US9927517B1 (en) | 2016-12-06 | 2018-03-27 | At&T Intellectual Property I, L.P. | Apparatus and methods for sensing rainfall |
US10755542B2 (en) | 2016-12-06 | 2020-08-25 | At&T Intellectual Property I, L.P. | Method and apparatus for surveillance via guided wave communication |
US10727599B2 (en) | 2016-12-06 | 2020-07-28 | At&T Intellectual Property I, L.P. | Launcher with slot antenna and methods for use therewith |
US10694379B2 (en) | 2016-12-06 | 2020-06-23 | At&T Intellectual Property I, L.P. | Waveguide system with device-based authentication and methods for use therewith |
US10135145B2 (en) | 2016-12-06 | 2018-11-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for generating an electromagnetic wave along a transmission medium |
US10637149B2 (en) | 2016-12-06 | 2020-04-28 | At&T Intellectual Property I, L.P. | Injection molded dielectric antenna and methods for use therewith |
US10439675B2 (en) | 2016-12-06 | 2019-10-08 | At&T Intellectual Property I, L.P. | Method and apparatus for repeating guided wave communication signals |
US10446936B2 (en) | 2016-12-07 | 2019-10-15 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system and methods for use therewith |
US10547348B2 (en) | 2016-12-07 | 2020-01-28 | At&T Intellectual Property I, L.P. | Method and apparatus for switching transmission mediums in a communication system |
US10027397B2 (en) | 2016-12-07 | 2018-07-17 | At&T Intellectual Property I, L.P. | Distributed antenna system and methods for use therewith |
US9893795B1 (en) | 2016-12-07 | 2018-02-13 | At&T Intellectual Property I, Lp | Method and repeater for broadband distribution |
US10389029B2 (en) | 2016-12-07 | 2019-08-20 | At&T Intellectual Property I, L.P. | Multi-feed dielectric antenna system with core selection and methods for use therewith |
US10243270B2 (en) | 2016-12-07 | 2019-03-26 | At&T Intellectual Property I, L.P. | Beam adaptive multi-feed dielectric antenna system and methods for use therewith |
US10168695B2 (en) | 2016-12-07 | 2019-01-01 | At&T Intellectual Property I, L.P. | Method and apparatus for controlling an unmanned aircraft |
US10139820B2 (en) | 2016-12-07 | 2018-11-27 | At&T Intellectual Property I, L.P. | Method and apparatus for deploying equipment of a communication system |
US10359749B2 (en) | 2016-12-07 | 2019-07-23 | At&T Intellectual Property I, L.P. | Method and apparatus for utilities management via guided wave communication |
US10601494B2 (en) | 2016-12-08 | 2020-03-24 | At&T Intellectual Property I, L.P. | Dual-band communication device and method for use therewith |
US10069535B2 (en) | 2016-12-08 | 2018-09-04 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves having a certain electric field structure |
US9998870B1 (en) | 2016-12-08 | 2018-06-12 | At&T Intellectual Property I, L.P. | Method and apparatus for proximity sensing |
US10938108B2 (en) | 2016-12-08 | 2021-03-02 | At&T Intellectual Property I, L.P. | Frequency selective multi-feed dielectric antenna system and methods for use therewith |
US10916969B2 (en) | 2016-12-08 | 2021-02-09 | At&T Intellectual Property I, L.P. | Method and apparatus for providing power using an inductive coupling |
US10530505B2 (en) | 2016-12-08 | 2020-01-07 | At&T Intellectual Property I, L.P. | Apparatus and methods for launching electromagnetic waves along a transmission medium |
US9911020B1 (en) | 2016-12-08 | 2018-03-06 | At&T Intellectual Property I, L.P. | Method and apparatus for tracking via a radio frequency identification device |
US10103422B2 (en) | 2016-12-08 | 2018-10-16 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10411356B2 (en) | 2016-12-08 | 2019-09-10 | At&T Intellectual Property I, L.P. | Apparatus and methods for selectively targeting communication devices with an antenna array |
US10389037B2 (en) | 2016-12-08 | 2019-08-20 | At&T Intellectual Property I, L.P. | Apparatus and methods for selecting sections of an antenna array and use therewith |
US10777873B2 (en) | 2016-12-08 | 2020-09-15 | At&T Intellectual Property I, L.P. | Method and apparatus for mounting network devices |
US10326689B2 (en) | 2016-12-08 | 2019-06-18 | At&T Intellectual Property I, L.P. | Method and system for providing alternative communication paths |
US10340983B2 (en) | 2016-12-09 | 2019-07-02 | At&T Intellectual Property I, L.P. | Method and apparatus for surveying remote sites via guided wave communications |
US10264586B2 (en) | 2016-12-09 | 2019-04-16 | At&T Mobility Ii Llc | Cloud-based packet controller and methods for use therewith |
US9838896B1 (en) | 2016-12-09 | 2017-12-05 | At&T Intellectual Property I, L.P. | Method and apparatus for assessing network coverage |
US9973940B1 (en) | 2017-02-27 | 2018-05-15 | At&T Intellectual Property I, L.P. | Apparatus and methods for dynamic impedance matching of a guided wave launcher |
US10298293B2 (en) | 2017-03-13 | 2019-05-21 | At&T Intellectual Property I, L.P. | Apparatus of communication utilizing wireless network devices |
Also Published As
Publication number | Publication date |
---|---|
DE1766377B1 (en) | 1972-06-08 |
GB1190888A (en) | 1970-05-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3482251A (en) | Transceive and tracking antenna horn array | |
US3495262A (en) | Horn feed having overlapping apertures | |
Demmerle et al. | A biconical multibeam antenna for space-division multiple access | |
US3750185A (en) | Dipole antenna array | |
US4458250A (en) | 360-Degree scanning antenna with cylindrical array of slotted waveguides | |
US4001834A (en) | Printed wiring antenna and arrays fabricated thereof | |
US4343005A (en) | Microwave antenna system having enhanced band width and reduced cross-polarization | |
US4975712A (en) | Two-dimensional scanning antenna | |
US4482897A (en) | Multibeam segmented reflector antennas | |
US5467100A (en) | Slot-coupled fed dual circular polarization TEM mode slot array antenna | |
US3500419A (en) | Dual frequency,dual polarized cassegrain antenna | |
US2965898A (en) | Antenna | |
JPH0444441B2 (en) | ||
US4665405A (en) | Antenna having two crossed cylindro-parabolic reflectors | |
US4823143A (en) | Intersecting shared aperture antenna reflectors | |
US6563473B2 (en) | Low sidelobe contiguous-parabolic reflector array | |
US3276022A (en) | Dual frequency gregorian-newtonian antenna system with newtonian feed located at common focus of parabolic main dish and ellipsoidal sub-dish | |
US2918673A (en) | Antenna feed system | |
US4712111A (en) | Antenna system | |
US4509055A (en) | Blockage-free space fed antenna | |
GB1236629A (en) | Bi-directional electronically scanned antenna system | |
US4114162A (en) | Geodesic lens | |
US6781554B2 (en) | Compact wide scan periodically loaded edge slot waveguide array | |
US4001837A (en) | Dual scan corner reflector antenna | |
Wengenroth | A mode transducing antenna |