CN203326119U - Narrow beam micro-strip circular polarization array antenna - Google Patents
Narrow beam micro-strip circular polarization array antenna Download PDFInfo
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- CN203326119U CN203326119U CN2013204070697U CN201320407069U CN203326119U CN 203326119 U CN203326119 U CN 203326119U CN 2013204070697 U CN2013204070697 U CN 2013204070697U CN 201320407069 U CN201320407069 U CN 201320407069U CN 203326119 U CN203326119 U CN 203326119U
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Abstract
The utility model provides a narrow beam micro-strip circular polarization array antenna. The antenna mainly comprises an antenna array and a feed network connected with the antenna array, wherein the antenna array comprises at least 24 antenna elements, each row of the antenna array is symmetrically distributed around a column center line of the antenna array, at least two antenna elements are distributed at each side of the center line of the antenna array in each row, and the feed network comprises an antenna port, an element port and a micro-strip impedance transformation line. The narrow beam micro-strip circular polarization array antenna provided by the embodiment of the utility model has the advantages of high gain, narrow beam, low side lobe and low back lobe. The antenna provided by the utility model is high in performance index, and meets requirements of ETC (electronic toll collection) roadside units.
Description
Technical field
The utility model relates to communication technical field, relates in particular to the micro-band circular polarised array antenna of a kind of narrow beam.
Background technology
ETC(Electronic Toll Collection, electric non-stop toll) system is the autoelectrinic Fare Collection System of main research and extension in the world at present, is applicable to the vehicle toll solution under the bridge tunnel environment of highway and heavy traffic.RSU(Roadside Unit, roadside device) be the standard fitting of ETC system, generally install on the track of charge station.When vehicle when the ETC track, OBU(On Board Unit, board units) with RSU by antenna transmission and received RF signal, not needing to stop to complete the ETC charge, thereby improves the automobile passage rate, effectively solves traffic blocking problem.
In the communication process of ETC system, the array antenna of narrow beam has guaranteed the effective covering of RSU to pavement of road; Sidelobe has guaranteed that RSU can not communicate with the vehicle of adjacent lane; Low episternites has guaranteed that RSU can not communicate with the vehicle in track dorsad.Therefore, having the narrow beam of the low episternites characteristic of Sidelobe micro-is the critical elements that realizes the ETC Fare Collection System with the low array antenna of circular polarization.
The utility model content
Embodiment of the present utility model provides the low micro-band circular polarised array antenna of episternites of a kind of narrow beam Sidelobe and ETC system, to realize micro-band circular polarised array antenna, is effectively applied to the ETC system.
The utility model provides following technical scheme:
The micro-band circular polarised array antenna of a kind of narrow beam comprises:
Aerial array, with the feeding network be connected with described aerial array, described aerial array comprises at least 24 bays, every a line in described aerial array is symmetrical around the row center line of aerial array, every a line at least two bays that distribute respectively on the both sides of the center line of aerial array, described feeding network comprises antenna port, array element port and micro-band impedance transformation line.
Described bay adopts asymmetric manner to distribute, and each square bay adopts the mode of cutting equilateral right-angled triangle to realize perturbation.
Distance between the bay of same a line is 0.7 times of transmission line wavelength.
The feed place excitation amplitude of each bay distributes according to Dao Erfu-Chebyshev's formula, and it is zero that the feed place of each bay encourages amplitude-phase poor.
Described feeding network is the feeding network that series feed and parallelly feeding combine.
Described feeding network comprises an antenna port and 24 array element ports, each array element port connects respectively a bay, by described micro-band impedance transformation line, antenna port is connected with each array element port, will be connected between each array element port by described micro-band impedance transformation line.
Described 24 array element ports are divided into the four lines setting, in the first row and fourth line, on the both sides of described antenna port, distinguish symmetrically arranged 2 array element ports, at the second row and the third line, on the both sides of described antenna port, distinguish symmetrically arranged 4 array element ports.
Each array element port that the right of described antenna port in described the first row, the second row, the third line and fourth line arranges forms respectively a port set, each array element port that the left side of the described antenna port in described the first row, the second row, the third line and fourth line arranges forms respectively a port set, each array element port in each port set is connected mutually, in parallel mutually between the different port group.
The impedance of each array element port of described feeding network is 75 ohm, and antenna port impedance is 50 ohm.
In the roadside device of described antenna applications in electronic charging system without parking.
The technical scheme provided by above-mentioned embodiment of the present utility model can be found out, the micro-band circular polarised array antenna of the narrow beam that the utility model embodiment provides has that gain is large, wave beam is narrow, Sidelobe, low episternites, this antenna performance index is high, meets the requirement of ETC roadside device.
The accompanying drawing explanation
The micro-schematic diagram of the concrete structure with circular polarised array antenna of a kind of narrow beam that Fig. 1 provides for the utility model embodiment, in figure, bay 11, feeding network 12;
The floor map of a kind of bay that Fig. 2 the utility model embodiment provides;
The structural representation of a kind of feeding network that Fig. 3 the utility model embodiment provides, in figure, antenna port A, 24 array element port B1-B24;
The micro-schematic diagram of the measured performance with circular polarised array antenna of the narrow beam that Fig. 4 the utility model embodiment provides.
Embodiment
For ease of the understanding to the utility model embodiment, take several specific embodiments below in conjunction with accompanying drawing and be further explained explanation as example, and each embodiment does not form the restriction to the utility model embodiment.
The micro-schematic diagram of the concrete structure with circular polarised array antenna of a kind of narrow beam that the utility model embodiment provides as shown in Figure 1, comprise: aerial array, with the feeding network be connected with described aerial array, described aerial array comprises at least 24 bays, every a line in described aerial array is symmetrical around the row center line of aerial array, every a line at least two bays that distribute respectively on the both sides of the center line of aerial array.In Fig. 1, added Reference numeral on exemplary first bay in every a line, the Reference numeral of other bay in each row has been omitted.Described feeding network comprises antenna port, array element port and micro-band impedance transformation line.
Described bay adopts asymmetric manner to distribute, and the distance between each bay of same a line is 0.7 times of transmission line wavelength.The bay unit adopts integrated coplanar microstrip line network feed, and feeding network adopts the mode of series feed in conjunction with parallelly feeding.
As shown in Figure 2, square antenna array element adopts the mode of cutting isosceles right triangle to realize perturbation to the floor map of a kind of bay that this embodiment provides, and produces two vertically polarized waves and forms circular polarization.Square antenna array element converts by matched line, reaches the array element port Impedance in 75 Europe.
Described feeding network is the feeding network that series feed and parallelly feeding combine.Described feeding network comprises an antenna port and 24 array element ports, each array element port connects respectively a bay, by described micro-band impedance transformation line, antenna port is connected with each array element port, will be connected between each array element port by described micro-band impedance transformation line.
The structural representation of a kind of feeding network that this embodiment provides as shown in Figure 3, comprises that antenna port A and 24 array element ports of B1-B24 meter amount to 25 ports.Described 24 array element ports are divided into the four lines setting, in the first row and fourth line, on the both sides of described antenna port, distinguish symmetrically arranged 2 array element ports, at the second row and the third line, on the both sides of described antenna port, distinguish symmetrically arranged 4 array element ports.Each array element port that the right of described antenna port in described the first row, the second row, the third line and fourth line arranges forms respectively a port set, each array element port that the left side of the described antenna port in described the first row, the second row, the third line and fourth line arranges forms respectively a port set, each array element port in each port set is connected mutually, in parallel mutually between the different port group.
The arrangement mode of 24 bays shown in above-mentioned Fig. 3 is only example, in actual applications, the arrangement mode of 24 bays can also be other mode, such as, be symmetrical arranged respectively 3 bays in the first row, the second row, the third line and fourth line on the both sides of described antenna port, every provisional capital arranges 6 bays.Again such as, be symmetrical arranged respectively 4 bays in the first row, fourth line on the both sides of described antenna port, be that the every provisional capital of the first row, fourth line arranges 8 bays, be symmetrical arranged respectively 2 bays at the second row, the third line on the both sides of described antenna port, the second row, the every provisional capital of the third line arrange 4 bays.
Between each port, by micro-band impedance transformation line, connected, by optimizing, the width of impedance transformation line meets the approximate ratio relation of 1:0.6:0.3:0.1 and 1:0.6:0.4, and the length of every section impedance transformation line is all 1 times of transmission line wavelength, makes each bay reach the state of cophase detector.In Fig. 3, B1-B4, B5-B8, B9-B12, B13-B16, B17-B18, B19-B20, B21-B22, B23-B24 form 8 port set.Adopt series feed in each port set, between each port set, adopt parallelly feeding, by optimizing, the CURRENT DISTRIBUTION between each port meets Dao Erfu-Chebyshev inequality and distributes.The parallelly feeding network is convenient to optimize, and the series feed network configuration is simple, and area occupied is little.By optimizing, the impedance of antenna port A is 50 ohm, and the impedance of B1-B24 array element port is 75 ohm.24 array element ports can be realized coupling with 24 bays.
The feed place excitation amplitude of each bay distributes according to Dao Erfu-Chebyshev's formula, and it is zero that the feed place of each bay encourages amplitude-phase poor.The impedance of each array element port of described feeding network is 75 ohm, and antenna port impedance is 50 ohm.
The measured performance schematic diagram of the array antenna provided for the utility model embodiment as shown in Figure 4.As seen from Figure 4, the maximum of aerial radiation is at 30dB, and the maximum of secondary lobe is no more than 10dB, and the gap of maximum and minimum value is 56.9192dB.The result that computer automation testing provides, main lobe gain reaches 17dBi, and the half power lobe width of level field is only 18 degree, and test performance has reached design objective.
The micro-application band with circular polarised array antenna of narrow beam of the present utility model can be the 5.8GHz frequency range, can be applied in the RSU in the ETC system.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, and the module in accompanying drawing or flow process might not be that enforcement the utility model is necessary.
One of ordinary skill in the art will appreciate that: the module in the equipment in embodiment can be described and be distributed in the equipment of embodiment according to embodiment, also can carry out respective change and be arranged in the one or more equipment that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into a plurality of submodules.
In sum, the micro-band circular polarised array antenna of the narrow beam that the utility model embodiment provides has that gain is large, wave beam is narrow, Sidelobe, low episternites, and this antenna performance index is high, meets the requirement of ETC roadside device.
The micro-mode that adopts series feed and parallelly feeding to combine with the feeding network in circular polarised array antenna of the narrow beam that the utility model embodiment provides, the parallelly feeding network is convenient to optimize, and the series feed network configuration is simple, area occupied is little.
The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.
Claims (10)
1. the micro-band circular polarised array antenna of narrow beam, is characterized in that, comprising:
Aerial array, with the feeding network be connected with described aerial array, described aerial array comprises at least 24 bays, every a line in described aerial array is symmetrical around the row center line of aerial array, every a line at least two bays that distribute respectively on the both sides of the center line of aerial array, described feeding network comprises antenna port, array element port and micro-band impedance transformation line.
2. the micro-band circular polarised array antenna of narrow beam according to claim 1, is characterized in that, described bay adopts asymmetric manner to distribute, and each square bay adopts the mode of cutting equilateral right-angled triangle to realize perturbation.
3. the micro-band circular polarised array antenna of narrow beam according to claim 1, is characterized in that, the distance between the bay of same a line is 0.7 times of transmission line wavelength.
4. the micro-band circular polarised array antenna of narrow beam according to claim 1, is characterized in that, the feed place excitation amplitude of each bay distributes according to Dao Erfu-Chebyshev's formula, and it is zero that the feed place of each bay encourages amplitude-phase poor.
5. according to the micro-band circular polarised array antenna of the described narrow beam of claim 1 to 4 any one, it is characterized in that, described feeding network is the feeding network that series feed and parallelly feeding combine.
6. the micro-band circular polarised array antenna of narrow beam according to claim 5, it is characterized in that, described feeding network comprises an antenna port and 24 array element ports, each array element port connects respectively a bay, by described micro-band impedance transformation line, antenna port is connected with each array element port, will be connected between each array element port by described micro-band impedance transformation line.
7. the micro-band circular polarised array antenna of narrow beam according to claim 6, it is characterized in that, described 24 array element ports are divided into the four lines setting, distinguish symmetrically arranged 2 array element ports in the first row and fourth line on the both sides of described antenna port, at the second row and the third line, on the both sides of described antenna port, distinguish symmetrically arranged 4 array element ports.
8. the micro-band circular polarised array antenna of narrow beam according to claim 7, it is characterized in that, each array element port that the right of described antenna port in described the first row, the second row, the third line and fourth line arranges forms respectively a port set, each array element port that the left side of the described antenna port in described the first row, the second row, the third line and fourth line arranges forms respectively a port set, each array element port in each port set is connected mutually, in parallel mutually between the different port group.
9. the micro-band circular polarised array antenna of narrow beam according to claim 5, is characterized in that, the impedance of each array element port of described feeding network is 75 ohm, and antenna port impedance is 50 ohm.
10. the micro-band circular polarised array antenna of narrow beam according to claim 1, is characterized in that, in the roadside device of described antenna applications in electronic charging system without parking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013204070697U CN203326119U (en) | 2013-07-09 | 2013-07-09 | Narrow beam micro-strip circular polarization array antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013204070697U CN203326119U (en) | 2013-07-09 | 2013-07-09 | Narrow beam micro-strip circular polarization array antenna |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810612A (en) * | 2015-05-06 | 2015-07-29 | 江苏拓元科技发展有限公司 | High-gain low-side-lobe microstrip array antenna applicable to portable meteorological satellite receiver |
| GB2532207A (en) * | 2014-11-06 | 2016-05-18 | Bluwireless Tech Ltd | Radio frequency communications devices |
| GB2532206A (en) * | 2014-11-06 | 2016-05-18 | Bluwireless Tech Ltd | Antennas |
| CN105874646A (en) * | 2014-03-21 | 2016-08-17 | 华为技术有限公司 | Array antenna |
| CN109088161A (en) * | 2018-08-13 | 2018-12-25 | 苏州速感智能科技有限公司 | It works in the micro-strip paster antenna, array and array design methodology of millimere-wave band |
| CN110034382A (en) * | 2019-03-04 | 2019-07-19 | 惠州市德赛西威汽车电子股份有限公司 | A kind of radar millimeter wave antenna |
| CN112003030A (en) * | 2020-08-18 | 2020-11-27 | 上海矽杰微电子有限公司 | Millimeter wave microstrip array antenna for traffic radar detection |
| CN112615167A (en) * | 2020-12-08 | 2021-04-06 | 北京首科丰汇科技有限公司 | Parallel-feed microstrip patch antenna array |
| CN113451786A (en) * | 2021-06-25 | 2021-09-28 | 重庆两江卫星移动通信有限公司 | Control method for compact feed network and circularly polarized antenna array |
| CN114824830A (en) * | 2022-06-29 | 2022-07-29 | 盛纬伦(深圳)通信技术有限公司 | Patch array antenna with circularly polarized side lobe suppression |
-
2013
- 2013-07-09 CN CN2013204070697U patent/CN203326119U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874646A (en) * | 2014-03-21 | 2016-08-17 | 华为技术有限公司 | Array antenna |
| US10320090B2 (en) | 2014-03-21 | 2019-06-11 | Huawei Technologies Co., Ltd. | Array antenna |
| GB2532207A (en) * | 2014-11-06 | 2016-05-18 | Bluwireless Tech Ltd | Radio frequency communications devices |
| GB2532206A (en) * | 2014-11-06 | 2016-05-18 | Bluwireless Tech Ltd | Antennas |
| CN104810612A (en) * | 2015-05-06 | 2015-07-29 | 江苏拓元科技发展有限公司 | High-gain low-side-lobe microstrip array antenna applicable to portable meteorological satellite receiver |
| CN109088161A (en) * | 2018-08-13 | 2018-12-25 | 苏州速感智能科技有限公司 | It works in the micro-strip paster antenna, array and array design methodology of millimere-wave band |
| CN110034382A (en) * | 2019-03-04 | 2019-07-19 | 惠州市德赛西威汽车电子股份有限公司 | A kind of radar millimeter wave antenna |
| CN112003030A (en) * | 2020-08-18 | 2020-11-27 | 上海矽杰微电子有限公司 | Millimeter wave microstrip array antenna for traffic radar detection |
| CN112615167A (en) * | 2020-12-08 | 2021-04-06 | 北京首科丰汇科技有限公司 | Parallel-feed microstrip patch antenna array |
| CN113451786A (en) * | 2021-06-25 | 2021-09-28 | 重庆两江卫星移动通信有限公司 | Control method for compact feed network and circularly polarized antenna array |
| CN114824830A (en) * | 2022-06-29 | 2022-07-29 | 盛纬伦(深圳)通信技术有限公司 | Patch array antenna with circularly polarized side lobe suppression |
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Granted publication date: 20131204 |