CN100588032C - Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna - Google Patents
Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna Download PDFInfo
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- CN100588032C CN100588032C CN200610117043A CN200610117043A CN100588032C CN 100588032 C CN100588032 C CN 100588032C CN 200610117043 A CN200610117043 A CN 200610117043A CN 200610117043 A CN200610117043 A CN 200610117043A CN 100588032 C CN100588032 C CN 100588032C
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- radiant element
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Abstract
The invention includes radiant element plate, power divider, hard coaxial cable, and feeding ports. Two bottom ends of two pieces of power divider are connected to two feeding ports respectively. Being as double-sided board, the radiant element plate is composed of first dielectric plate, four antenna units, and ground plate. In same radiant element plate, antenna units are arranged in long direction. Interval between each two pieces of antenna units is equal. Each antenna unit is connected to hard coaxial cable. Two ends of inner conductor of the hard coaxial cable are connected to antenna unit on radiant element plate, and output port on the power divider respectively. Two ends of outer conductor of the hard coaxial cable are connected to ground plate of the radiant element plate, and ground plate of the power divider. Being in use for WLAN comm. system, the invention realizes omnidirectional/directional conversion of directional diagram with higher gain.
Description
Technical field
The present invention relates to a kind of antenna of wireless communication technology field, specifically is a kind of omnibearing/directive directional diagram reconstructable high-gain double frequency antenna that is applied to WLAN (wireless local area network).
Background technology
In recent years, along with the fast development of radio communication especially WLAN (wireless local area network), design is applicable to the 2.4GHz that is operated in of wireless lan (wlan), and the dual-band antenna of 5GHz frequency band has become the key issue in the present WLAN technology.
Find through literature search prior art, the dual-band antenna and the reconfigurable antenna that are applicable to WLAN are the two big focuses of studying in the modern antennas technology, be published in the electric article of rolling up with electronic engineering association antenna and radio transmission wall bulletin (IEEE ANTENNAS AND WIRELESS PROPAGATIONLETTERS) the 4th in 2005 people such as Tae-Hyun Kim: be applied in the small-sized dual-band antenna of two L (Compact Dual-BandAntenna With Double L-Slits for WLAN Operations) of WLAN, the gain of antenna is quite low, at 2.4GHz frequency range highest-gain is 1.3dBi, at 5GHz frequency range highest-gain is 2dBi, is unfavorable for so to greatest extent signal being radiate effectively.Therefore, the antenna that is applicable to wlan system of design high-gain is a problem anxious to be solved.
In addition, WLAN requirement meeting to directional diagram in different applied environments is different, for example work as AP and be placed in ceiling, during wall, require it to 180 degree directed radiations, because can reduce the loss that power is brought to unnecessary direction radiation like this, and the direction that does not need received signal is played the effect of shielding; And when AP is placed in the center in room, need day alignment 360 degree omnidirectional radiations, to guarantee can both to receive its signal in indoor all directions.For this requirement, need to introduce the notion of reconfigurable antenna design.Reconfigurable antenna generally has frequency reconfigurable antenna and directional diagram reconstructable aerial.For directional diagram reconstructable aerial, at present domestic and international all directional diagram reconstructable aerials of beam position for a change of studying are not to be directional diagram omnidirectional/directed reconfigurable antenna.
Summary of the invention
The objective of the invention is to deficiency, improve the low shortcoming of gain, and realize directional diagram omnidirectional/directed reconfigurable antenna, a kind of omnibearing/directive directional diagram reconstructable high-gain double frequency antenna that is applied to WLAN (wireless local area network) is provided at above Antenna Design.According to the character of monopole antenna, utilize the coupling between the monopole antenna to realize the characteristic of double frequency, and reach the purpose of widening frequency band.The gain that the present invention utilizes vertical array structure to improve antenna utilizes symmetrical structure to realize directional diagram omnidirectional/orientation conversion.
The present invention is achieved by the following technical solutions, the present invention includes: two blocks of radiant element plates, two blocks of power divider plates, hard coaxial line and two feed port.The antenna element that comprises four equally spaced vertical arrangements in the described radiant element plate connects with hard coaxial line between radiant element plate and the power divider plate, and the bottom of described two blocks of power divider plates links to each other with two feed port respectively.
Described radiant element plate is a double sided board, is made up of first dielectric-slab, four antenna elements.Antenna element comprises long-armed and galianconism, the low frequency end characteristic of long-armed control antenna, and the front end characteristic of galianconism control antenna in order to increase bandwidth, is designed to zigzag fashion with galianconism.
On same block of radiant element plate, the distance between per two antenna elements is equally spaced.Each antenna element is connected with hard coaxial line.The two ends of the inner wire of hard coaxial line connect the antenna element of radiant element plate and the output port of power divider respectively, and the two ends of the outer conductor of hard coaxial line connect the ground plate of radiant element plate and the ground plate of power divider respectively.
Described power divider plate is a double sided board, is made up of second dielectric-slab, microstrip line and ground plate.Power divider is made up of the microstrip line that width is different according to the function of the principle realization broadband splitter of transition line.The bottom of power divider is a feed port, by this feed port energy is passed to power divider, four output ports of power divider are distributed to four hard coaxial lines that are connected this four port equably with energy, carry out feed with this to four antenna elements on the described radiant element plate of the other end that is connected four hard coaxial lines.
Described hard coaxial line promptly plays the effect that connects radiant element plate and power divider plate, sends energy to antenna element from power divider, plays the effect of support again.
The width of two described power divider plates is slightly larger than the width of two described radiant element plates, directed radiation when guaranteeing a port feed.Antenna element in two described radiant element plates is vertically arranged.
The present invention at first is transferred to power divider by feed port with the TEM ripple, and in order to be complementary with general transmission line impedance, the microstrip line of the feed port of power divider is set to 50 Ω impedances.
The present invention adopts symmetrical structure, a radiant element plate, and a power divider plate and four hard coaxial lines are formed a directional antenna.Another piece radiant element plate, another piece power divider plate and other four hard coaxial lines are formed another directional antenna.Two cover directional antennas are placed by symmetry, and when a port feed, antenna is a directed radiation, and when two-port simultaneously during feed, antenna is an omnidirectional radiation.
The present invention compares with prior art, and its effect is actively with tangible.The gain that the present invention adopts vertical array structure to increase antenna, and adopt symmetrical structure, when a port feed, directed radiation during feed, is not realized in the another port, when two-port realizes omnidirectional radiation during feed simultaneously, has therefore realized directional diagram orientation/omnidirectional's conversion.The present invention meets the WLAN specified standard, can be used for the WLAN communication system.
Description of drawings
Fig. 1 is the Facad structure schematic diagram of radiant element plate of the omnibearing/directive directional diagram reconstructable high-gain double frequency antenna of a kind of WLAN of being used for of the present invention;
Fig. 2 is the structure schematic diagram of radiant element plate of the omnibearing/directive directional diagram reconstructable high-gain double frequency antenna of a kind of WLAN of being used for of the present invention;
Fig. 3 is the Facad structure schematic diagram of power divider plate of the omnibearing/directive directional diagram reconstructable high-gain double frequency antenna of a kind of WLAN of being used for of the present invention;
Fig. 4 is the structure schematic diagram of power divider plate of the omnibearing/directive directional diagram reconstructable high-gain double frequency antenna of a kind of WLAN of being used for of the present invention;
Fig. 5 is the end view of the omnibearing/directive directional diagram reconstructable high-gain double frequency antenna of a kind of WLAN of being used for of the present invention;
Fig. 6 is the standing-wave ratio curve of the test and the emulation of antenna among Fig. 1～Fig. 5;
Wherein Fig. 6 (a) antenna when directed radiation first the cover directional antenna the S11 parameter, Fig. 6 (b) antenna when directed radiation second the cover directional antenna the S11 parameter, the S11 parameter of Fig. 6 (c) antenna when omnidirectional radiation
Fig. 7 is the test of antenna on correlated frequency and the orientation direction figure of emulation among Fig. 1～Fig. 5;
The directional diagram of Fig. 7 (a) antenna on the 2.45GHz frequency wherein, the directional diagram of Fig. 7 (b) antenna on the 5.25GHz frequency
Fig. 8 is the test of antenna on correlated frequency and the omni-directional pattern of emulation among Fig. 1～Fig. 5;
The directional diagram of Fig. 8 (a) antenna on the 2.45GHz frequency wherein, the directional diagram of Fig. 8 (b) antenna on the 5.25GHz frequency
Fig. 9 is the test of antenna on correlated frequency and the gain of emulation among Fig. 1～Fig. 5.
The wherein gain of Fig. 9 (a) directional antenna on the 2.45GHz frequency, the gain of Fig. 9 (b) directional antenna on the 5.25GHz frequency; The gain of Fig. 9 (c) omnidirectional antenna on the 2.45GHz frequency, the gain of Fig. 9 (d) omnidirectional antenna on the 5.25GHz frequency.
Embodiment
As Fig. 1～shown in Figure 5, the present invention includes: the first radiant element plate 1, the second radiant element plate 2, the first power divider plate 3 and the second power divider plate 4, hard coaxial line 5, first feed port 6 and second feed port 7, link to each other with four hard coaxial lines between the first radiant element plate 1 and the first power divider plate 3, equally also link to each other between the second radiant element plate 2 and the second power divider plate 4 with four hard coaxial lines.The first radiant element plate 1 is made of first dielectric-slab 8, four antenna elements of vertically arranging 9 and the ground plate 10 of antenna element.The second radiant element plate 1 is made of second dielectric-slab 12, four antenna elements of vertically arranging 9 and the ground plate 10 of antenna element.
Four antenna elements 9 of the described first radiant element plate 1 are arranged by vertical along the longitudinal centre line of first dielectric-slab 8, and the spacing of per two antenna elements equates.Four antenna elements 9 of the described second radiant element plate 2 are arranged by vertical along the longitudinal centre line of second dielectric-slab 12, and the spacing of per two antenna elements equates.
The described first radiant element plate 1, described first power divider 3 and four described hard coaxial lines 5 are formed one group of directional antenna, and the described second radiant element plate 2, four described hard coaxial lines 5 of described second power divider 4 and other are formed another group directional antenna.Two groups of directional antenna symmetries are placed, distance between two power dividers can be adjusted according to the needs of omnidirectional radiation directional diagram, when two groups of directional antennas during simultaneously by feed, this antenna is realized the omnidirectional radiation function, in two groups of directional antennas, there is one group by feed, other one group during not by feed, this antenna is realized directed radiation function.
The earth terminal 13 of described hard coaxial line, the ground plate 10 of described radiant element plate link to each other with the ground plate 11 of described power divider.
Example:
As Fig. 1～Fig. 5 is the structural representation of example antenna of the present invention, and the first radiant element plate 1 is made of first dielectric-slab 8, four antenna elements of vertically arranging 9 and the ground plate 10 of antenna element.The second radiant element plate 1 is made of second dielectric-slab 12, four antenna elements of vertically arranging 9 and the ground plate 10 of antenna element.Link to each other with four hard coaxial lines between the first radiant element plate 1 and the first power divider plate 3, equally also link to each other between the second radiant element plate 2 and the second power divider plate 4 with four hard coaxial lines.Four antenna elements 9 of the described first radiant element plate 1 are arranged by vertical along the longitudinal centre line of first dielectric-slab 8, and the spacing of per two antenna elements equates.Four antenna elements 9 of the described second radiant element plate 2 are arranged by vertical along the longitudinal centre line of second dielectric-slab 12, and the spacing of per two antenna elements equates.The described first radiant element plate 1, described first power divider 3 and four described hard coaxial lines 5 are formed one group of directional antenna, and the described second radiant element plate 2, four described hard coaxial lines 5 of described second power divider 4 and other are formed another group directional antenna.
The earth terminal 13 of described hard coaxial line, the ground plate 10 of described radiant element plate link to each other with the ground plate 11 of described power divider.
Specifically be of a size of: the length of first dielectric-slab 8 and second dielectric-slab 12 is 150.5mm, wide is 20mm, relative dielectric constant is 2.2, thickness is 0.8mm, and the length of described power divider 2 is 150.5mm, and wide is 32mm, relative dielectric constant is 2.2, thickness is 0.8mm, and the length of eight hard coaxial lines 5 is 8.365mm, and resistance is 50 Ω.Distance between first power divider 3 and second power divider 4 is 5mm, so the length of integrated antenna is 150.5mm, and width is 32mm, and thickness is 25mm.
Fig. 6 is the standing-wave ratio curve of this example antenna.As can be seen from the figure no matter this antenna is that directed radiation or omnidirectional radiation all have good radiation characteristic at 2.45GHz and 5.25GHz.
Fig. 7 is the test of antenna on correlated frequency and the orientation direction figure of emulation among Fig. 6.As can be seen from the figure, antenna can be realized 180 degree directed radiations at 2.45GHz and 5.25GHz.
Fig. 8 is the test of antenna on correlated frequency and the omni-directional pattern of emulation among Fig. 6.As can be seen from the figure, antenna can be realized 360 degree directed radiations at 2.45GHz and 5.25GHz.
Fig. 9 is the test of antenna on correlated frequency and the gain of emulation among Fig. 6.As can be seen from the figure, the average gain that antenna gains when directed radiation at the 2.45GHz place is 7.78dBi, average gain at the 5.25GHz place is 12.52dBi, and the average gain at the 2.45GHz place when omnidirectional radiation is 6.32dBi, and the average gain at the 5.25GHz place is 9.73dBi.
According to this example, two groups of directional antenna symmetries are placed, distance between two power dividers can be adjusted according to the needs of omnidirectional radiation directional diagram, when two groups of directional antennas during simultaneously by feed, this antenna is realized the omnidirectional radiation function, have one group by feed in two groups of directional antennas, other one group during not by feed, this antenna is realized directed radiation function.Therefore, antenna can be realized directional diagram orientation/omnidirectional's conversion, and no matter is directed radiation or omnidirectional radiation, and antenna all can be realized good performance at 2.45GHz and 5.25GHz.And the gain of antenna is compared with existing antenna and is significantly increased.
Claims (2)
1, a kind of omnibearing/directive directional diagram reconstructable high-gain double frequency antenna, comprise: two blocks of radiant element plates, two blocks of power divider plates, hard coaxial line and two feed port, it is characterized in that: the bottom of two blocks of power divider plates links to each other with two feed port respectively, described radiant element plate is a double sided board, by first dielectric-slab, four antenna elements and ground plate are formed, on same block of radiant element plate, antenna element is vertically arranged, distance between per two antenna elements is equally spaced, each antenna element is connected with hard coaxial line, the two ends of the inner wire of hard coaxial line connect the antenna element of radiant element plate and the output port of power divider respectively, and the two ends of the outer conductor of hard coaxial line connect the ground plate of radiant element plate and the ground plate of power divider respectively;
Described antenna element comprises long-armed and galianconism, the low frequency end characteristic of long-armed control antenna, and the front end characteristic of galianconism control antenna, its galianconism is a zigzag fashion;
Described power divider plate is a double sided board, form by second dielectric-slab, microstrip line and ground plate, power divider is realized the function of broadband splitter according to the principle of transition line, form by the microstrip line that width is different, the bottom of power divider is a feed port, by this feed port energy is passed to power divider, four output ports of power divider are distributed to four hard coaxial lines that are connected this four port equably with energy, carry out feed with this to four antenna elements on the described radiant element plate of the other end that is connected four hard coaxial lines;
Described hard coaxial line promptly plays the effect that connects radiant element plate and power divider plate, sends energy to antenna element from power divider, plays the effect of support again;
A described radiant element plate, a power divider plate and four hard coaxial lines are formed a directional antenna; Another piece radiant element plate, another piece power divider plate and other four hard coaxial lines are formed another directional antenna, two cover directional antennas are placed by symmetry, and when a port feed, antenna is a directed radiation, when two-port simultaneously during feed, antenna is an omnidirectional radiation.
2, omnibearing/directive directional diagram reconstructable high-gain double frequency antenna according to claim 1 is characterized in that, the width of described power divider plate is greater than the width of radiant element plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610117043A CN100588032C (en) | 2006-10-12 | 2006-10-12 | Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610117043A CN100588032C (en) | 2006-10-12 | 2006-10-12 | Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna |
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| Publication Number | Publication Date |
|---|---|
| CN1937319A CN1937319A (en) | 2007-03-28 |
| CN100588032C true CN100588032C (en) | 2010-02-03 |
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| CN200610117043A Expired - Fee Related CN100588032C (en) | 2006-10-12 | 2006-10-12 | Omnibearing/directive directional diagram reconstructable high-gain double frequency antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2276116A4 (en) * | 2008-04-10 | 2012-09-12 | Siemens Ag | Antenna module |
| DE102016007052A1 (en) | 2016-06-06 | 2017-12-07 | Kathrein-Werke Kg | Circuit board arrangement for signal supply of a radiator |
| CN112531330B (en) * | 2019-09-18 | 2022-11-25 | 青岛海信移动通信技术股份有限公司 | Mobile terminal and mobile terminal accessory equipment |
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