CN102163767A - Coplane-integrated global positioning system (GPS)/intelligent transportation system (ITS) antenna - Google Patents
Coplane-integrated global positioning system (GPS)/intelligent transportation system (ITS) antenna Download PDFInfo
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- CN102163767A CN102163767A CN2011100724616A CN201110072461A CN102163767A CN 102163767 A CN102163767 A CN 102163767A CN 2011100724616 A CN2011100724616 A CN 2011100724616A CN 201110072461 A CN201110072461 A CN 201110072461A CN 102163767 A CN102163767 A CN 102163767A
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- 230000010287 polarization Effects 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
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- 238000005859 coupling reaction Methods 0.000 description 3
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- 230000018109 developmental process Effects 0.000 description 3
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- 238000012360 testing method Methods 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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- 230000005855 radiation Effects 0.000 description 2
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- 229910052738 indium Inorganic materials 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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Abstract
The invention provides a coplane-integrated global positioning system (GPS)/intelligent transportation system (ITS) antenna which simultaneously face to applications of GPS and ITS, thereby meeting the requirements of simple manufacturing process, low cost and low profile of a terminal antenna. The antenna is restricted in a space volume of 55*55*3 mm<3> and is extremely suitable for being arranged on the top of traffic equipment. By the coplane-integrated GPS/ITS multifunctional antenna, a right-handed circular polarization signal meeting a GPS L2 frequency range (1.227GHz) can be generated, and a vertical polarization omnibearing directional diagram for covering an ITS SERVICE 5.8GHz frequency range is provided. During implementation, a common double-layer printing circuit board is just used, the production process is simple, and the cost is low; and all the structures of the antenna are in a coplane, and the antenna provided by the invention is extremely suitable for being arranged on the top of the traffic device.
Description
Technical field
The invention belongs to the terminal antenna technical field of wireless communication technology, the GPS/ITS antenna that particularly a kind of coplane is integrated.
Background technology
Along with the fast development of wireless communication technology, various communication services become interrelated, complement each other in the modern life.In order to improve the effective rate of utilization of terminal antenna space resources, user terminal need be integrated in multiple service on the same antenna.Because the different communication service is different to the requirement of directional diagram and polarization, the multifrequency antenna of traditional single port feed can not satisfy the demand of Multi-Function Antenna.An exemplary is the Vehicular multifunctional antenna, and it had both produced the circular polarization directional diagram of a corresponding global position system, and the perpendicular polarization omni-directional pattern of a corresponding land mobile service is provided again.This is because many land mobile services need be known the vehicle position by global positioning system (GPS).
The information of vehicles that intelligent transportation system (ITS) is collected on the highway is implemented point duty and control, reach reduce duration of congestion, reduce traffic accident, trip is convenient and the purpose of protection environment.The intelligent transportation system development potentiality is huge, will lead the change of China's traffic administration system and pattern, is the inevitable choice that informationization, intellectuality, high efficiency, socialization are gone in China's traffic administration.At present, the China and the U.S. have given the 5.8GHz frequency allocation short haul connection service (DSRCS) of ITS.And in Britain, the undelegated 5.470-5.725GHz frequency range of global radio access technology (WiMAX) also is considered to the possible candidate's frequency range of ITS.According to the standard of Institute of Electrical and Electric Engineers (IEEE), the ITS service must be passed through global positioning system (GPS) time service, thereby obtains synchronised clock.Therefore, the automotive electronics market is simple and compact for structure to researching and developing, the GSP/ITS Multi-Function Antenna has active demand cheaply.
The GPS global positioning system is U.S.'s second generation satellite navigation system, generally is used for consumer electronics product, on mobile phone and personal digital assistant (PDA) equipment.Vehicle-mounted GSP navigation system is that developed recently is rapid, and the standard that has become automobile market is equipped with.Most important receiving-member is gps antenna in the GSP user terminal, and the quality of its performance will directly determine the transmitting-receiving performance of GPS terminal.Traditional gps antenna often adopts the wall helical structure, stretches out four spiral metal arms and uses as antenna.Wall helical antenna bulky, the section height promptly is not suitable for being unfavorable for the ITS antenna integrated in the car antenna yet.Therefore, a technical problem that presses for those skilled in the art's solution at present is exactly: how can propose a kind of novel GPS/ITS Multi-Function Antenna with innovating, to satisfy the demand of vehicle-mounted ITS service.
Summary of the invention
Technical problem to be solved by this invention provides the integrated GPS/ITS antenna of a kind of coplane, simultaneously towards the application of global positioning system (GPS) and intelligent transportation system (ITS), satisfies the requirement that the terminal antenna manufacture craft is simple, low-cost, hang down section.
In order to address the above problem, the invention discloses the integrated GPS/ITS antenna of a kind of coplane, comprise square microwave-medium substrate (1), Q-RING paster (2), square paster (3), floor (4), microstrip-fed (5), short circuit through hole (6), apex drive probe (7), gps signal feed port (8) and ITS signal feed port (9), described circular microwave-medium substrate (1) is a polytetrafluoroethylmaterial material, dielectric constant is 2.65, the loss tangent angle is 0.002, thickness is 3mm, size is 100mm * 100mm, and the thickness of substrate double-sided copper-clad is 0.07mm.
Preferably, described square paster (3) is positioned at the center of microwave-medium substrate (1) upper surface, and it is evenly surrounded by Q-RING paster (2), is etched with the slit between square paster (3) and the Q-RING paster (2).
Preferably, the terminal of described microstrip feed line (5) is connected with floor (4) short circuit by short circuit through hole (6).
Preferably, the microstrip feed line (5) of an end of described gps signal feed port (8) and upper surface joins, and the other end and floor (4) join.
Preferably, an end of described ITS signal feed port (9) links to each other with the square paster (2) of upper surface by apex drive probe (7), and the other end and floor (4) join.
Preferably, gps antenna and ITS antenna integrated by having adopted common printed circuit doubling plate to realize, and all structures of antenna all are coplanes.
Compared with prior art, the present invention has the following advantages:
The invention provides the integrated GPS/ITS antenna of a kind of coplane,, satisfy the requirement that the terminal antenna manufacture craft is simple, low-cost, hang down section simultaneously towards the application of global positioning system (GPS) and intelligent transportation system (ITS).Described antenna is limited in spatial volume 55 * 55 * 3mm
3In, be fit to very much be placed in the top of transit equipment.The integrated GPS/ITS Multi-Function Antenna of this coplane promptly can produce a right-handed circular polarization signal that satisfies GPS L2 frequency range (1.227GHz), and the perpendicular polarization omni-directional pattern that covers ITS service 5.8GHz frequency range can be provided again.Only adopted common printed circuit doubling plate in the realization, manufacture craft is simple, cost is low, and all structures of antenna all are coplanes, is fit to very much be placed in the top of transit equipment.
Simultaneously, the method for designing of the GPS/ITS Multi-Function Antenna that coplane provided by the invention is integrated, not only can GPS/ITS in the service, also can be applied in the design of other Multi-Function Antenna of mobile communication the corresponding size of adjusting described antenna according to the vocational work frequency.
In addition, the present invention provides good support for the popularization and the industrialization of ITS service, promotes the development of ITS antenna technology, and the multifunctional vehicle mounted antenna that allows miniaturization, coplane easily install becomes a reality.
Description of drawings
Fig. 1 is the three-dimensional representation intention of the integrated GPS/ITS antenna of coplane provided by the invention;
Fig. 2 is vertical view for the A of Fig. 1 to view;
Fig. 3 is central cross-section figure for the B of Fig. 1 to view;
Fig. 4 is A, the B of Fig. 1 embodiment dimensional drawing to view structure, and unit is millimeter (mm);
Fig. 5 is the GPS feed port reflection coefficient (S11) of the integrated GPS/ITS Multi-Function Antenna of the coplane of Fig. 4 embodiment and the survey map of axial ratio coefficient;
Fig. 6 is the survey map of the ITS feed port reflection coefficient (S22) of the integrated GPS/ITS Multi-Function Antenna of the coplane of Fig. 4 embodiment;
Fig. 7 is the survey map of the integrated GPS/ITS Multi-Function Antenna interport isolation of the coplane of embodiment of Fig. 4: (a) interport isolation of GPS L2 frequency range; (b) interport isolation of ITS frequency range;
Power gain directional diagram when Fig. 8 works in 1227MHz for the GPS feed port of the integrated GPS/ITS Multi-Function Antenna of the coplane of the embodiment of Fig. 4: (---: the power gain directional diagram of right-handed circular polarization component;-----: the power gain directional diagram of left-hand circular polarization component): (a): X-Z planar power gain pattern; (b): Y-Z planar power gain pattern;
Power gain directional diagram when Fig. 9 works in 5800MHz for the ITS feed port of the integrated GPS/ITS Multi-Function Antenna of the coplane of the embodiment of Fig. 4: (
θ component power gain directional diagram;
Component power gain directional diagram): (a): X-Z planar power gain pattern; (b): Y-Z planar power gain pattern.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1, Fig. 2 and Fig. 3, show the integrated GPS/ITS antenna of a kind of coplane of the present invention, described antenna specifically comprises:
Square microwave-medium substrate 1, Q-RING paster 2, square paster 3, floor 4, microstrip-fed 5, short circuit through hole 6, apex drive probe 7, gps signal feed port 8 and ITS signal feed port 9;
Square microwave-medium substrate 1 contains upper surface and lower surface is two-layer; Method Q-RING paster 2, square paster 3, microstrip-fed 5 upper surfaces of processing at microwave-medium substrate 1 by etching; The lower surface of microwave-medium substrate 1 is metal, and promptly the floor 4;
The terminal of microstrip feed line 5 is connected with floor 4 short circuits by short circuit through hole 6;
One end and the microstrip feed line 5 of gps signal feed port 8 join, and the other end and floor 4 join;
One end of ITS signal feed port 9 links to each other with the square paster 2 of upper surface by apex drive probe 7, and the other end and floor 4 join;
The realization thought of technical scheme of the present invention: realize the GPS/ITS Multi-Function Antenna, the perpendicular polarization omni-directional pattern that must obtain to cover the right-handed circular polarization directional diagram of GPS frequency range and cover the ITS frequency range.The method for designing of the capacity coupled single port excitation of coplane that the present invention is novel realizes circular polarization, the mode of the microstrip feed line 5 coupling feeds by terminal short circuit encourages the capable wave mode of Q-RING paster 2, thereby obtain GPS right-handed circular polarization signal, its mode of operation is seen the approximate directional coupler of thinking.In order to obtain to cover the perpendicular polarization omni-directional pattern of ITS frequency range, encourage square paster 3 by apex drive probe 7, it is operated under the TM02 pattern.The TM02 pattern is the radial transmission line pattern of paster antenna, and directional diagram is similar to monopole, promptly required perpendicular polarization omni-directional pattern.Yet the TM02 pattern is a higher mode, and the Q value is high, and impedance bandwidth is narrow, can not satisfy to cover the ITS frequency range fully.In order to widen the bandwidth of ITS antenna, with Q-RING paster 2 ring sets on square paster 3.Square paster 3 also is operated under the TM02 pattern Q-RING paster 2, thereby obtains double resonance in the ITS frequency range, thereby strengthen the bandwidth of ITS antenna by slit and 2 couplings of Q-RING paster.
This structure specifies as follows:
Realize GPS right-handed circular polarization antenna, at first design the size of Q-RING paster 2 according to GPS L2 frequency range (1.227GHz), the average perimeter of Q-RING paster 2 approximates the equivalent operation wavelength of a GPS L2 frequency range; Secondly the width by regulating microstrip feed line 5 and realize the impedance matching of GPS feed port 8 with the distance of Q-RING paster; At last by regulating the axial ratio coefficient that microstrip feed line 5 length are regulated its directional diagram;
Realize the ITS vertical depolarized omnidirectional antenna, at first design the size of square loop paster 3 according to ITS frequency range (5.8GHz); Secondly it is encouraged at the center of square paster by apex drive probe 7, realize the impedance matching of ITS feed port 9 by the diameter that changes apex drive probe 7; Then, regulate the gap size of square paster 3 and Q-RING paster, change their stiffness of coupling, be implemented in the double resonance of ITS frequency range, thereby widen the bandwidth of ITS frequency range.
Microwave-medium substrate 1 adopts polytetrafluoroethylmaterial material cheaply, and dielectric constant is 2.65, and the loss tangent angle is 0.002, and thickness is 3mm, and size is 100mm * 100mm; GPS feed port and ITS feed port all adopt the SMA head, and characteristic impedance is 50 Ω; All the other each partly sizes as shown in Figure 4, unit is millimeter (mm).
The GPS feed port reflection coefficient (S11) of the GPS/ITS Multi-Function Antenna that the coplane of the embodiment made from size shown in Figure 4 is integrated and the test result of axial ratio coefficient are as shown in Figure 5, the return loss S11 of this gps antenna＜-bandwidth of 10dB is 1210-1238MHz (29MHz), axial ratio bandwidth is 9MHz, centre frequency is 1227MHz, can cover GPS L2 frequency range (1.227GHz).
The test result of the ITS feed port reflection coefficient (S22) of the GPS/ITS Multi-Function Antenna that the coplane of the embodiment made from size shown in Figure 4 is integrated as shown in Figure 6, the return loss S11 of this ITS antenna＜-bandwidth of 10dB is 5550-6570MHz (1020MHz, 17.5%).
With the test result of the integrated GPS/ITS Multi-Function Antenna interport isolation of the coplane of the embodiment of Fig. 4 as shown in Figure 7, at GPS working frequency range and ITS working frequency range, the isolation of GPS feed port 8 and ITS feed port 9 all is higher than 20dB.
Power gain directional diagram when the GPS feed port of the GPS/ITS Multi-Function Antenna that the coplane of the embodiment made from size shown in Figure 4 is integrated works in 1227MHz is shown in 8.In X-Z plane and Y-Z plane, the main radiation direction of gps antenna is pointed to the top, and cross polarization all is better than 20dB in 3dB wave beam bandwidth, and good right-handed circular polarization characteristic is arranged.In the scope of GPS L2 frequency range (1.227GHz), antenna gain is 5.4dBi.
Power gain directional diagram when working in 5800MHz with the ITS feed port of the integrated GPS/ITS Multi-Function Antenna of the coplane of the embodiment of Fig. 4 as shown in Figure 9.As can be seen, the ITS antenna is a radiation zero in top orientation, and main lobe direction is 40 °, and good perpendicular polarization omni-directional pattern is arranged, and cross polarization all is better than 20dB in 3dB wave beam bandwidth.In the ITS band limits, antenna gain is 5.3～6.0dBi.
As can be known, described antenna realizes that the impedance matching of the GPS/ITS Multi-Function Antenna that coplane is integrated is good, promptly can produce a right-handed circular polarization signal that satisfies GPS L2 frequency range (1.227GHz), the perpendicular polarization omnidirectional side that covers ITS service 5.8GHz frequency range can be provided again; Simultaneously described antenna has only adopted common printed circuit doubling plate, and manufacture craft is simple, cost is low, and all structures of antenna all are coplanes, is fit to very much be placed in the top of transit equipment.The present invention provides good support for the popularization and the industrialization of ITS service, promotes the development of ITS antenna technology, and the multifunctional vehicle mounted antenna that allows miniaturization, coplane easily install becomes a reality.
The method for designing of the GPS/ITS Multi-Function Antenna that coplane provided by the invention is integrated not only can GPS/ITS in the service, also can be applied in the design of other Multi-Function Antenna of mobile communication the corresponding size of adjusting described antenna according to the vocational work frequency.Manufacture craft of the present invention is simple, and cost is low, has realized that the coplane of gps antenna and ITS antenna is integrated, and has satisfied the easily structural requirement of installation of low section, coplane, and antenna stabilization is good, has very high practical value.
More than the integrated GPS/ITS antenna of a kind of coplane provided by the present invention is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. GPS/ITS antenna that coplane is integrated, comprise square microwave-medium substrate (1), Q-RING paster (2), square paster (3), floor (4), microstrip-fed (5), short circuit through hole (6), apex drive probe (7), gps signal feed port (8) and ITS signal feed port (9), it is characterized in that:
Described circular microwave-medium substrate (1) is a polytetrafluoroethylmaterial material, and dielectric constant is 2.65, and the loss tangent angle is 0.002, and thickness is 3mm, and size is 100mm * 100mm, and the thickness of substrate double-sided copper-clad is 0.07mm.
2. the GPS/ITS antenna that coplane according to claim 1 is integrated is characterized in that:
Described square paster (3) is positioned at the center of microwave-medium substrate (1) upper surface, and it is evenly surrounded by Q-RING paster (2), is etched with the slit between square paster (3) and the Q-RING paster (2).
3. the GPS/ITS antenna that coplane according to claim 1 is integrated is characterized in that:
The terminal of described microstrip feed line (5) is connected with floor (4) short circuit by short circuit through hole (6).
4. the GPS/ITS antenna that coplane according to claim 1 is integrated is characterized in that:
The microstrip feed line (5) of one end of described gps signal feed port (8) and upper surface joins, and the other end and floor (4) join.
5. the GPS/ITS antenna that coplane according to claim 1 is integrated is characterized in that:
One end of described ITS signal feed port (9) links to each other with the square paster (2) of upper surface by apex drive probe (7), and the other end and floor (4) join.
6. the GPS/ITS antenna that coplane according to claim 1 is integrated is characterized in that:
Gps antenna and ITS antenna integrated by having adopted common printed circuit doubling plate to realize, and all structures of antenna all are coplanes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110072461.6A CN102163767B (en) | 2011-03-24 | 2011-03-24 | Coplane-integrated global positioning system (GPS)/intelligent transportation system (ITS) antenna |
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| CN201110072461.6A CN102163767B (en) | 2011-03-24 | 2011-03-24 | Coplane-integrated global positioning system (GPS)/intelligent transportation system (ITS) antenna |
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| CN103703620A (en) * | 2013-08-26 | 2014-04-02 | 华为技术有限公司 | Wideband dual-polarization array antenna and base station |
| CN104659480A (en) * | 2015-02-13 | 2015-05-27 | 深圳市大疆创新科技有限公司 | Impedance matching structure, antenna assembly and aircraft as well as impedance matching method of aircraft |
| CN106025534A (en) * | 2016-07-13 | 2016-10-12 | 苏州卡基纳斯通信科技有限公司 | Multi-frequency Beidou high-precision antenna |
| CN106711605A (en) * | 2015-07-27 | 2017-05-24 | 莱尔德电子材料（上海）有限公司 | Multiband vehicle-mounted antenna module |
| CN111224218A (en) * | 2020-01-09 | 2020-06-02 | 青岛海信移动通信技术股份有限公司 | Mobile terminal equipment and signal enhancement method thereof |
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