CN102394377A - Millimeter wave linearly polarized vehicle-mounted fanned beam antenna - Google Patents
Millimeter wave linearly polarized vehicle-mounted fanned beam antenna Download PDFInfo
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- CN102394377A CN102394377A CN2011101934895A CN201110193489A CN102394377A CN 102394377 A CN102394377 A CN 102394377A CN 2011101934895 A CN2011101934895 A CN 2011101934895A CN 201110193489 A CN201110193489 A CN 201110193489A CN 102394377 A CN102394377 A CN 102394377A
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Abstract
The invention discloses a millimeter wave linearly polarized vehicle-mounted fanned beam antenna, belonging to the technical field of antennas. The antenna comprises a planar sum-difference network, coupled-fed slots, waveguide slots, metal walls, a microstrip slot surface, rigid support foam and a metal sheet, wherein a sum port and a difference port of the planar sum-difference network are ports connected with the outside; the waveguide slots are formed on the back of the planar sum-difference network; the waveguide slots and the planar sum-difference network are connected by the coupled-fed slots; the metal walls are positioned at the two sides of the waveguide slots; the planar sum-difference network, the coupled-fed slots, the waveguide slots and the metal walls integrally serve as an antenna back sheet; the metal sheet is positioned on the reverse side of the antenna back sheet and covers the planar sum-difference network; the microstrip slot surface is bonded with the waveguide slots by conductive adhesives; and the rigid support foam is positioned between the metal walls, is fixed on the metal walls and covers the microstrip slot surface. The antenna has the following beneficial effects: the defects of high processing cost, low yield, small work bandwidth and long processing period of metal waveguide slot arrays and the defect of low gain of microstrip patch array antennas are overcome.
Description
Technical field
The present invention relates to the vehicle-mounted fan-beam antenna of a kind of millimeter wave linear polarization, belong to antenna technical field.
Background technology
Along with developing rapidly of mobile satellite communication technology and auto-navigation system, the vehicle intelligent antenna system has obtained increasing application, and well behaved vehicle intelligent antenna communication, a navigation system have high requirement to the performance of antenna.
The metal waveguide slot antenna is the antenna of a kind of easy realization narrow beam, high-gain, Low Sidelobe, has advantages such as section is low, easy of integration, volume is little, conveniently is loaded on the vehicle, is a kind of antenna that is widely used in communicating by letter with radar system.What traditional metal wave guide slot array antenna row generally adopted is the form of broadside standing wave slit battle array, and difficulty of processing is big, rate of finished products is low, processing cost is high, the shortcoming of work zone width but it has.The microband paste array antenna also is a kind of array antenna form with plane, easy of integration, advantage such as volume is little, but its radiation efficiency is low, causes gain lower.The main antenna form that is applied to vehicle-carrying communication, navigation system at present as stated.
Summary of the invention
The present invention is directed to the above-mentioned defective of prior art; For bandwidth that improves wave guide resonance broadside slit battle array and the purpose that realizes the pulse wide band high-gain,, the vehicle-mounted fan-beam antenna of a kind of millimeter wave linear polarization has been proposed based on the principle of traditional rectangular waveguide broadside slit battle array; Antenna volume of the present invention is little; Have the pulse fan-shaped beam, can cooperate multiple vehicle-carrying communication, navigation system, and can adapt to multiple road conditions.
The vehicle-mounted fan-beam antenna of this millimeter wave linear polarization comprises plane sum-difference network, coupling feed R-joining, waveguide slot, metallic walls, microstrip gap face, rigid support foam and metallic plate; Its midplane sum-difference network with mouth and difference mouthful be an outside connectivity port; The sum-difference network back side, plane is waveguide slot, and the two is connected by coupling feed R-joining; Metallic walls is positioned at the both sides of waveguide slot; Plane sum-difference network, coupling feed R-joining, waveguide slot and metallic walls integral body are as the antenna backboard; Metallic plate is positioned at the reverse side of antenna backboard, the overlay planes sum-difference network, and the microstrip gap face is bonding through conducting resinl and waveguide slot; The rigid support foam is positioned in the middle of the metallic walls, and fixed thereon, covers the microstrip gap face.
Described plane sum-difference network comprises and mouth, difference mouth, plane evil spirit T and waveguide bend groove; Be connected through waveguide and plane evil spirit T with the difference mouth with mouth, be external connection port; And tell two feed waveguide bend grooves from plane evil spirit T, the plane sum-difference network receives signal with two parts of antenna and realizes vector and poor through plane evil spirit T, realizes the wave beam of horizontal dimension and poor.
Described coupling feed R-joining comprises a plurality of inclined slots, is responsible for connecting waveguide slot and plane sum-difference network, realizes the transmission of signal between aerial radiation part and plane sum-difference network through the electromagnetic field couples effect.
Described waveguide slot comprises a plurality of rectangle straight wave guide grooves that process, and presents two-dimensional symmetric according to the requirement of aerial array and arranges, and makes electromagnetic wave in waveguide slot, realize resonance condition.
Described metallic walls comprises the two strip metal walls parallel with waveguide slot; Through the height and the spacing of regulating two strip metal walls simultaneously; Antenna is carried out wave beam forming, make antenna beam satisfy the wave beam requirement of pitching, horizontal dimension, and play the effect that improves 1～2dB gain.
The single face medium copper-clad plate of described microstrip gap face for handling through the printing etching technics; Its metal covering processes the rectangular aperture array; And tighten together with waveguide slot; The surface is a dielectric layer; Microstrip gap face and waveguide slot are formed the aerial radiation part, and the electromagnetic wave that is resonance condition in the waveguide slot is arrived free space through gap radiation, and play the effect of broadening antenna bandwidth of operation through dielectric layer.
What described metallic plate made that two holes supply the plane sum-difference network on it mouthful is connected use with the outside with mouth and difference.
The course of work of array antenna emission state of the present invention is: the electromagnetic wave signal that needs emission by with mouth input plane sum-difference network, evil spirit T is divided into two-way constant amplitude in-phase signal through the plane, imports two waveguide bend grooves respectively into; The two paths of signals of waveguide bend groove output gets in the waveguide slot through coupling feed R-joining, through waveguide slot and microstrip gap towards external radiation; The line polarization wave that gives off is realized wave beam forming through the metallic walls of both sides, plays the purpose that improves gain.
The course of work of array antenna received state of the present invention is: the electromagnetic wave of free space partly forms the guided electromagnetic wave signal through the aerial radiation of array antenna; This signal gets into two waveguide bend grooves of plane sum-difference network through coupling feed R-joining, and the two paths of signals of its output is realized the vector of one dimension and poor through plane evil spirit T, respectively through mouthful exporting next interface unit to mouth and difference, for further processing.
Beneficial effect
The present invention is based on the compound theory proposition of medium, and the broadside that uses the microstrip gap face to replace waveguide to crack has guaranteed that antenna has the operating characteristic of waveguide broadside gap array, utilizes the printing etching technics to obtain significant cost reduction simultaneously; The working medium composite construction has been expanded the bandwidth of operation of slit battle array; Utilize two parallel up and down strip metal walls of array to realize wave beam compression and figuration, and increase gain; Utilize evil spirit T in plane to realize the plane sum-difference network, when significantly reducing antenna volume the horizontal one dimension of realization and difference beam.
The present invention had both solved that metal waveguide slit battle array processing cost is high, rate of finished products is low, work zone width and long shortcoming of process-cycle; Solved the low shortcoming of the microband paste gain of array antenna again, can provide that a kind of cost is low, rate of finished products is high (consistency is high), the work zone is wide, the process-cycle is short, high-gain and satisfying and low standing wave, height and the difference beam coverage rate millimeter wave dielectric composite waveguide slot array antenna of wave beam and the requirement of difference beam directional diagram; Antenna volume of the present invention is little, has the pulse fan-shaped beam, can cooperate multiple vehicle-carrying communication, navigation system, and can adapt to multiple road conditions.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention;
Fig. 2 is the microstrip gap face structure chart of array antenna in the embodiment; Wherein (a) is front elevation, (b) is reverse side figure;
Fig. 3 is the structure chart of the antenna backboard of array antenna in the embodiment; Wherein (a) is front elevation, (b) is reverse side figure;
Fig. 4 be in the embodiment array antenna at f0 ± 400MHz voltage standing wave ratio curve;
Fig. 5 be in the embodiment array antenna f0-200MHz frequency horizontal plane with the difference directional diagram;
Fig. 6 be in the embodiment array antenna f0 frequency horizontal plane with the difference directional diagram;
Fig. 7 be in the embodiment array antenna f0+200MHz frequency horizontal plane with the difference directional diagram;
Fig. 8 be in the embodiment array antenna at f0-200MHz frequency pitching face directional diagram;
Fig. 9 be in the embodiment array antenna at f0 frequency pitching face directional diagram;
Figure 10 be in the embodiment array antenna at f0+200MHz frequency pitching face directional diagram.
Label declaration:
1-rigid support foam, 2-microstrip gap face, 3-coupling feed R-joining, 4-waveguide slot, 5-left side metallic walls, 6-right side metallic walls, 7-metallic plate, 8-plane sum-difference network.
Embodiment
For objects and advantages of the present invention better are described, the present invention is done further detailed description below in conjunction with accompanying drawing and embodiment.
As a kind of preferred embodiment of the present invention, the structure of the vehicle-mounted fan-beam antenna of millimeter wave linear polarization is shown in Fig. 1 and Fig. 3 (b).This array antenna comprises rigid support foam 1, microstrip gap face 2, coupling feed R-joining 3, waveguide slot 4, metallic walls (comprising left side metallic walls 5 and right side metallic walls 6), metallic plate 7 and plane sum-difference network 8.
With the signal receiving course is order, and the structure of array antenna is: rigid support foam 1 is positioned over directly over the microstrip gap face 2,2 protections of microstrip gap face is lived, and guarantee its evenness; The both sides of rigid support foam 1 are fixed as one with left side metallic walls 5 and right side metallic walls 6 respectively.The metal covering of microstrip gap face 2 and waveguide slot 4 are bonded together.The back side of waveguide slot 4 is plane sum-difference network 8, and the two is connected by coupling feed R-joining 3.Coupling feed R-joining 3, waveguide slot 4, metallic walls and plane sum-difference network 8 are formed the antenna backboard; Magic T in plane sum-difference network 8 employing planes and waveguide bend groove are formed, and by metallic plate 7 coverings, reservation and mouth and difference mouth are as external interface on the metallic plate 7.
The rigid support foam 1 of present embodiment is a kind of 24～38GHz frequency, low-loss, fire prevention dielectric material of working in, and its dielectric constant approaches air.Rigid support foam 1 is processed cuboid, be bonded together with left side metallic walls 5 and right side metallic walls 6.
The microstrip gap face 2 of present embodiment is the copper-clad plate of Rogers5880 single face medium, and like Fig. 2 (a) with (b), width is 28mm, and length is 229mm, and dielectric thickness 0.254mm, dielectric constant are 2.2, cover copper thickness 0.018mm, do gold-plated processing.The rectangular aperture width 0.6mm of processing is about length 3.3mm.
The antenna backboard of present embodiment is an aluminum, and like Fig. 3 (a) with (b), its upper and lower surfaces is done true qualities electric conductive oxidation or silver-plated processing to play the better protection effect; It in the present embodiment true qualities electric conductive oxidation.Antenna backboard length 229mm, width 72mm, thickness are 23.5mm.Left side metallic walls 5 highly is 4.5mm with right side metallic walls 6, and waveguide slot 4 is positioned at the centre of left side metallic walls 5 and right side metallic walls 6, degree of depth 2.74mm, width 5.48mm, length 104mm.Coupling feed R-joining 3 is positioned in the middle of the waveguide slot 4 width 0.6mm.
Can find out by Fig. 4, antenna bandwidth of operation 700MHz, standing-wave ratio is less than 2.
The array antenna that present embodiment is made is tested in the darkroom, and gained experimental result such as Fig. 5 are to shown in Figure 10.Therefrom can find out, on basic, normal, high three frequencies and wave beam horizontal dimension 3dB beamwidth realize ± 1.5 ° of coverings, secondary lobe is less than-18dB; Cover-15 °～+ 15 ° with wave beam pitching dimension 3dB beamwidth; Null depth of difference beam is superior to-25dB; Antenna efficiency is near 80%; Remove with wave beam main lobe angle of coverage, minor level be lower than-25dB disregards, and horizontal dimension become with the antenna array normal orientation ± the interior situation of 90 ° of beam angles under, the difference beam directional diagram is superior to 98% to the wave beam coverage rate with beam pattern.
In the darkroom, testing the table 1 that obtains by array antenna can find out, the test gain of the array antenna of present embodiment on basic, normal, high three frequencies is all greater than 23dB.
Table 1 array antenna test result
| Frequency | f0-200MHz | f0 | f0+200MHz |
| Gain (dB) | 23.8 | 23.1 | 24.1 |
The above is merely preferred embodiment of the present invention, and every equalization of in claim scope of the present invention, being done changes and modifies, and all should belong to the covering scope of claim of the present invention.
Claims (7)
1. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization; It is characterized in that: comprise plane sum-difference network, coupling feed R-joining, waveguide slot, metallic walls, microstrip gap face, rigid support foam and metallic plate; Its midplane sum-difference network with mouth and difference mouthful be an outside connectivity port; The sum-difference network back side, plane is waveguide slot, and the two is connected by coupling feed R-joining; Metallic walls is positioned at the both sides of waveguide slot; Plane sum-difference network, coupling feed R-joining, waveguide slot and metallic walls integral body are as the antenna backboard; Metallic plate is positioned at the reverse side of antenna backboard, the overlay planes sum-difference network, and the microstrip gap face is bonding through conducting resinl and waveguide slot; The rigid support foam is positioned in the middle of the metallic walls, and fixed thereon, covers the microstrip gap face.
2. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization as claimed in claim 1 is characterized in that: described plane sum-difference network comprises and mouth, difference mouth, plane evil spirit T and waveguide bend groove; Be connected through waveguide and plane evil spirit T with the difference mouth with mouth, be external connection port; And tell two feed waveguide bend grooves from plane evil spirit T, the plane sum-difference network receives signal with two parts of antenna and realizes vector and poor through plane evil spirit T, realizes the wave beam of horizontal dimension and poor.
3. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization as claimed in claim 2; It is characterized in that: described coupling feed R-joining comprises a plurality of inclined slots; Be responsible for connecting waveguide slot and plane sum-difference network, realize the transmission of signal between aerial radiation part and plane sum-difference network through the electromagnetic field couples effect.
4. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization as claimed in claim 3; It is characterized in that: described waveguide slot comprises a plurality of rectangle straight wave guide grooves that process; Present two-dimensional symmetric according to the requirement of aerial array and arrange, make electromagnetic wave in waveguide slot, realize resonance condition.
5. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization as claimed in claim 4; It is characterized in that: described metallic walls comprises the two strip metal walls parallel with waveguide slot; Through the height and the spacing of regulating two strip metal walls simultaneously; Antenna is carried out wave beam forming, make antenna beam satisfy the wave beam requirement of pitching, horizontal dimension, and play the effect that improves 1～2dB gain.
6. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization as claimed in claim 5 is characterized in that: the single face medium copper-clad plate of described microstrip gap face for handling through the printing etching technics; Its metal covering processes the rectangular aperture array; And tighten together with waveguide slot; The surface is a dielectric layer; Microstrip gap face and waveguide slot are formed the aerial radiation part, and the electromagnetic wave that is resonance condition in the waveguide slot is arrived free space through gap radiation, and play the effect of broadening antenna bandwidth of operation through dielectric layer.
7. the vehicle-mounted fan-beam antenna of millimeter wave linear polarization as claimed in claim 6 is characterized in that: what described metallic plate made that two holes supply the plane sum-difference network on it mouthful is connected use with the outside with mouth and difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110193489 CN102394377B (en) | 2011-07-12 | 2011-07-12 | Millimeter wave linearly polarized vehicle-mounted fanned beam antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110193489 CN102394377B (en) | 2011-07-12 | 2011-07-12 | Millimeter wave linearly polarized vehicle-mounted fanned beam antenna |
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| CN102394377A true CN102394377A (en) | 2012-03-28 |
| CN102394377B CN102394377B (en) | 2013-12-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474785A (en) * | 2013-09-24 | 2013-12-25 | 哈尔滨工业大学 | Seam-variable large-bandwidth traveling wave seam array antenna with radiation-type load |
| CN103490158A (en) * | 2013-09-24 | 2014-01-01 | 哈尔滨工业大学 | Aperture array antenna based on medium integration ridge waveguide |
| CN103811877A (en) * | 2014-02-18 | 2014-05-21 | 北京理工大学 | Ultra-wideband millimeter-wave linearly-polarized waveguide aperture array antenna |
| CN108736160A (en) * | 2017-04-20 | 2018-11-02 | 惠州硕贝德无线科技股份有限公司 | A kind of 5G terminal antennas that antenna pattern is restructural |
| CN113690572A (en) * | 2021-08-27 | 2021-11-23 | 成都老鹰信息技术有限公司 | Directional antenna for unmanned aerial vehicle interference gun |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127985A (en) * | 1997-07-31 | 2000-10-03 | Ems Technologies, Inc. | Dual polarized slotted array antenna |
| CN1494751A (en) * | 2001-03-21 | 2004-05-05 | ��ʽ�����}�˷�˹ | Waveguide slot antenna and mfg method thereof |
| CN101000981A (en) * | 2007-01-16 | 2007-07-18 | 北京海域天华通讯设备有限公司 | Waveguide slot array antenna |
-
2011
- 2011-07-12 CN CN 201110193489 patent/CN102394377B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6127985A (en) * | 1997-07-31 | 2000-10-03 | Ems Technologies, Inc. | Dual polarized slotted array antenna |
| CN1494751A (en) * | 2001-03-21 | 2004-05-05 | ��ʽ�����}�˷�˹ | Waveguide slot antenna and mfg method thereof |
| CN101000981A (en) * | 2007-01-16 | 2007-07-18 | 北京海域天华通讯设备有限公司 | Waveguide slot array antenna |
Non-Patent Citations (1)
| Title |
|---|
| 王少龙: "Ka波段单脉冲平板缝隙天线馈电网络分析", 《中国优秀硕士毕业论文全文数据库》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474785A (en) * | 2013-09-24 | 2013-12-25 | 哈尔滨工业大学 | Seam-variable large-bandwidth traveling wave seam array antenna with radiation-type load |
| CN103490158A (en) * | 2013-09-24 | 2014-01-01 | 哈尔滨工业大学 | Aperture array antenna based on medium integration ridge waveguide |
| CN103490158B (en) * | 2013-09-24 | 2015-04-29 | 哈尔滨工业大学 | Aperture array antenna based on medium integration ridge waveguide |
| CN103474785B (en) * | 2013-09-24 | 2015-07-08 | 哈尔滨工业大学 | Seam-variable large-bandwidth traveling wave seam array antenna with radiation-type load |
| CN103811877A (en) * | 2014-02-18 | 2014-05-21 | 北京理工大学 | Ultra-wideband millimeter-wave linearly-polarized waveguide aperture array antenna |
| CN103811877B (en) * | 2014-02-18 | 2016-02-24 | 北京理工大学 | Ultra broadband millimeter wave line polarization wave waveguide slot array antenna |
| CN108736160A (en) * | 2017-04-20 | 2018-11-02 | 惠州硕贝德无线科技股份有限公司 | A kind of 5G terminal antennas that antenna pattern is restructural |
| CN113690572A (en) * | 2021-08-27 | 2021-11-23 | 成都老鹰信息技术有限公司 | Directional antenna for unmanned aerial vehicle interference gun |
| CN113690572B (en) * | 2021-08-27 | 2023-06-09 | 成都老鹰信息技术有限公司 | Directional antenna for unmanned aerial vehicle interference gun |
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