CN205303682U - Circular polarization microstrip antenna array row - Google Patents
Circular polarization microstrip antenna array row Download PDFInfo
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- CN205303682U CN205303682U CN201521117646.4U CN201521117646U CN205303682U CN 205303682 U CN205303682 U CN 205303682U CN 201521117646 U CN201521117646 U CN 201521117646U CN 205303682 U CN205303682 U CN 205303682U
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Abstract
The utility model provides a circular polarization microstrip antenna array row, this antenna includes: a plurality of microstrip antenna units, feed network, dielectric plate, copper bottom plate. Wherein the microstrip antenna unit is located the dielectric plate upper surface with feed network, and copper bottom plate is located the dielectric plate lower surface. Feed network is to the antenna element of the adjacent row of colleague according to the excitation of the electric current of difference than carrying out the feed, encourage than carrying out the feed according to the electric current of difference the antenna element with being listed as adjacent lines, carry out rotating feed, looks phasic difference 90 or 270 to the antenna element with being listed as adjacent lines simultaneously. Feed network is to each antenna element's of antenna array different forms feed, lowers the secondary lobe of antenna array beam, and the axial ratio bandwidth of antenna has been extended in the gain that improves the mainboard, exhibition, is favorable to the application in the ETC system.
Description
Technical field
This utility model relates to microstrip antenna, particularly relates to the Antenna Design of roadside unit in electronic toll system for road.
Background technology
Electric non-stop toll (ElectronicTollingCollectionSystem) system has become as a big pillar industry of intelligent transportation. After the ETC system of China was sought unity of standard from 2007, growth momentum is swift and violent.
ETC system is the road toll system of a kind of advanced person, it utilizes special short-range wireless communication technologies (DedicatedShort-RangeCommunication, it is called for short DSRC), complete the roadside unit (Road-SideUnit being arranged on ETC track, be called for short RSU) with the vahicles label (OnBoardUnit being arranged on vehicle, be called for short OBU) between communication, when stopping, it is automatically performed charge and processes overall process, really realize unmanned, reduce management cost, improve vehicle pass-through efficiency, effectively alleviate charging aperture congestion problems.
At present, the topmost problem that ETC system faces is transaction success rate problem, and antenna receives and send the terminal of electromagnetic signal as roadside unit and vehicle carried electronic label, and its performance directly influences region and the quality of communication. Antenna should have higher gain, ensures that region overlay is reasonable again, not only to meet the covering to application region, also to avoid covering beyond application region, it is prevented that cause monkey chatter. This just requires that antenna has the feature of high-gain, Sidelobe.
Roadside unit antenna requirement is right-handed circular polarization antenna, good axial ratio bandwidth is also to ensure that one of antenna important indicator of transaction stability, traditional roadside unit antenna, is difficult to seeking balance state in Sidelobe and axial ratio bandwidth, excessively emphasizes that Sidelobe can cause that axial ratio bandwidth narrows; Broadening axial ratio bandwidth can bring again the deterioration of secondary lobe.
Therefore, design the circular polarised array antenna of a high-gain, Sidelobe, wideband axle ratio, the application of ETC roadside unit antenna is had great importance.
Utility model content
The purpose of this utility model is in that to provide a kind of circular polarization microstrip antenna array row. By the feeding network not constant amplitude feed at each array antenna unit of going together, and feed in the not constant amplitude of same column each row antenna element, force down the secondary lobe of antenna array beam, the gain of raising mainboard. And 90 �� or 270 �� of phase shift rotating feeds to same column adjacent lines antenna element, the broadening axial ratio bandwidth of antenna, it is ensured that antenna high-gain, Sidelobe, wideband axle ratio high-performance.
The purpose of this utility model is to provide a kind of circular polarization microstrip antenna array row, including microband antenna unit, feeding network, dielectric-slab, copper base plate, wherein:
Described microband antenna unit and feeding network are overlying on dielectric-slab upper surface;
Described copper base plate is overlying on dielectric-slab lower surface.
Alternatively, the antenna element of same column adjacent lines is rotated feed, phase 90 �� or 270 �� by described feeding network.
Alternatively, the antenna element of colleague's adjacent column is fed by described feeding network according to different current excitation ratios.
Alternatively, the antenna element of same column adjacent lines is fed by described feeding network according to different current excitation ratios.
Alternatively, the line number of described micro-strip antenna array is 2��6 row, it is preferable that 3 row, and columns is 2��10 row, it is preferable that 8 row.
Alternatively, described preferred 3 row antennas, each antenna element of the first row and the third line is kept same phase current excitation by feeding network, and the antenna element of the second row is kept the current excitation with one, three row 90 �� or 270 �� phase shifts of same column antenna element.
Alternatively, described preferred 8 array antennas, feeding network to the current excitation of 8 antenna elements of same a line than for 1:1.7:2.6:3.1:3.1:2.6:1.7:1.
Alternatively, described preferred 3 row antennas, feeding network to the current excitation of 3 antenna elements of same string than for 1:2:1.
The beneficial effects of the utility model are in that, feeding network realizes the not constant amplitude of each antenna element of antenna array is fed by the feeder line of different in width, forces down the secondary lobe of antenna array beam, improves the gain of mainboard. And 90 �� or 270 �� of phase shift rotating feeds to same column adjacent lines antenna element, the broadening axial ratio bandwidth of antenna, ensure that the high-performance of antenna high-gain, Sidelobe, wideband axle ratio, more utilize antenna application on the roadside unit of ETC system, improve stability and the success rate of transaction.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below the accompanying drawing used required during embodiment is described is briefly described.
Fig. 1 is the structural representation of the circular polarization microstrip antenna array row that this utility model embodiment relates to.
Fig. 2 is the axial ratio bandwidth figure of the circular polarization microstrip antenna array row that this utility model embodiment relates to.
Fig. 3 is the directional diagram that the circular polarization microstrip antenna array that this utility model embodiment relates to is listed in both horizontally and vertically.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments.
This embodiment is for the roadside unit antenna of ETC system, as it is shown in figure 1,101 is microband antenna unit, 102,103,104,105,106,107,108,109 is the feeder line of different in width in feeding network. Feeder line 102,103,104,105,106 is symmetrical with antenna array row centrage; Feeder line 107 is distributed with antenna array feed point centrosymmetry.
This circular polarization microstrip antenna array is classified as the face battle array structure of 3*8. Each of which row has 8 identic circular polarization microstrip antenna unit, and the column pitch between antenna element is equal; Each showing 3 identic circular polarization microstrip antenna unit, the line space of antenna element is equal. Each antenna element realizes right-handed circular polarization by butt angle, upper right side.
The feeding network that this utility model embodiment provides is string the feed form presented, wherein each row adopts series feed form, connected by a multipath power distributor is corresponding with the antenna element being positioned at same a line, and provide excitation for antenna element, and realized with cascade on the row centrage of antenna array by multiple multipath power distributors between each row and present form.
Feeder line 102,103,104,105 width change profile by a certain percentage, it is achieved with the impedance transformation between each microband antenna unit of a line, reaches the not constant amplitude to same a line antenna element and feeds, and ensures that phase place is equal simultaneously. Through the adjustment to feeder line width, finally the current feed Amplitude Ratio to 8 antenna elements of same a line is 1:1.7:2.6:3.1:3.1:2.6:1.7:1. Equally, feeder line 106,107 realizes with the impedance transformation between string microband antenna unit, and finally the current feed Amplitude Ratio to 3 antenna elements of same string is 1:2:1. The not constant amplitude feed of each antenna element of micro-strip antenna array, can effectively suppress the secondary lobe of antenna beam, improve main lobe gain, antenna beam is made more to concentrate effective over regulation region, and it is very weak with extraradial electromagnetic wave in regulation region, in ETC applies, it is possible to be effectively prevented from monkey chatter.
As it is shown in figure 1, the microband antenna unit of aerial array the second row compared to one, three liang of row, 90 �� of rotations clockwise, by feeder line 108,109, it is achieved the change of feed current phase place. The relatively same phase current feed of one, three liang of row antenna array units, the current feed of the antenna array unit of the second row has the phase place of 270 �� advanced. The distribution in proportion of same array antenna unit feed current phase place can the axial ratio bandwidth of broadening antenna effectively.
Fig. 2 is the axial ratio bandwidth figure of the circular polarization microstrip antenna array row that this utility model embodiment relates to. As seen from the figure, axle is 200M than the frequency bandwidth less than 3, is far longer than the 50M bandwidth that system needs, preferably the broadening axial ratio bandwidth of antenna.
Fig. 3 be this utility model embodiment relate to circular polarization microstrip antenna array row at directional diagram both horizontally and vertically. As seen from the figure, the main lobe beam gain both horizontally and vertically lobe width of aerial array is 16 �� and 30 ��, and secondary lobe suppresses respectively-30dB and-26dB.
This shows the circular polarization microstrip antenna array row that this utility model designs, it is possible to improving the main lobe gain of antenna, it is suppressed that the secondary lobe of antenna, the axial ratio bandwidth of broadening antenna, has important application value simultaneously.
Further, the circular polarization microstrip antenna array row of this utility model design, the current excitation ratio between antenna element can be adjusted according to practical situation and demand, and when implementing, this utility model embodiment is without limitation.
Further, the circular polarization microstrip antenna array row of this utility model design, column pitch between every a line antenna element is equal, line space between each array antenna unit is equal, according to actual needs, antenna element can also adopt unequal-interval, and when implementing, this utility model embodiment is without limitation.
Although being described in conjunction with the accompanying embodiment of the present utility model, but those skilled in the art can make various modifications and variations when without departing from spirit and scope of the present utility model, and such amendment and modification each fall within the scope being defined by the appended claims.
Claims (5)
1. circular polarization microstrip antenna array row, it is characterised in that include microband antenna unit, feeding network, dielectric-slab, copper base plate, wherein:
Described microband antenna unit and feeding network are overlying on dielectric-slab upper surface;
Described copper base plate is overlying on dielectric-slab lower surface.
2. circular polarization microstrip antenna array according to claim 1 row, it is characterised in that the antenna element of same column adjacent lines is rotated feed, phase 90 �� or 270 �� by described feeding network.
3. circular polarization microstrip antenna array according to claim 1 row, it is characterised in that the antenna element of colleague's adjacent column is fed by described feeding network according to different current excitation ratios.
4. circular polarization microstrip antenna array according to claim 1 row, it is characterised in that the antenna element of same column adjacent lines is fed by described feeding network according to different current excitation ratios.
5. circular polarization microstrip antenna array according to claim 1 row, it is characterised in that the line number of described micro-strip antenna array is 2��6 row, columns is 2��10 row.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521117646.4U CN205303682U (en) | 2015-12-29 | 2015-12-29 | Circular polarization microstrip antenna array row |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521117646.4U CN205303682U (en) | 2015-12-29 | 2015-12-29 | Circular polarization microstrip antenna array row |
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| Publication Number | Publication Date |
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| CN205303682U true CN205303682U (en) | 2016-06-08 |
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| CN201521117646.4U Active CN205303682U (en) | 2015-12-29 | 2015-12-29 | Circular polarization microstrip antenna array row |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361072A (en) * | 2018-11-02 | 2019-02-19 | 北京航天万鸿高科技有限公司 | A kind of double-layer wideband circularly polarization microstrip array antenna |
| CN111029768A (en) * | 2020-01-09 | 2020-04-17 | 广东健博通科技股份有限公司 | Broadband dual-polarization radiating unit and large-scale array antenna |
| US20220059937A1 (en) * | 2020-08-24 | 2022-02-24 | Arcadyan Technology Corporation | Antenna for suppressing the gain of side lobes |
-
2015
- 2015-12-29 CN CN201521117646.4U patent/CN205303682U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361072A (en) * | 2018-11-02 | 2019-02-19 | 北京航天万鸿高科技有限公司 | A kind of double-layer wideband circularly polarization microstrip array antenna |
| CN111029768A (en) * | 2020-01-09 | 2020-04-17 | 广东健博通科技股份有限公司 | Broadband dual-polarization radiating unit and large-scale array antenna |
| US20220059937A1 (en) * | 2020-08-24 | 2022-02-24 | Arcadyan Technology Corporation | Antenna for suppressing the gain of side lobes |
| US11611153B2 (en) * | 2020-08-24 | 2023-03-21 | Arcadyan Technology Corporation | Antenna for suppressing the gain of side lobes |
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