CN102163767B - 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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- CN102163767B CN102163767B CN201110072461.6A CN201110072461A CN102163767B CN 102163767 B CN102163767 B CN 102163767B CN 201110072461 A CN201110072461 A CN 201110072461A CN 102163767 B CN102163767 B CN 102163767B
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- 238000004519 manufacturing process Methods 0.000 abstract description 7
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- 238000009434 installation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005388 cross polarization Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
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- 206010039203 Road traffic accident Diseases 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, particularly a kind of coplanar integrated GPS/ITS antenna.
Background technology
Along with the fast development of wireless communication technology, in the modern life, various communication services become interrelated, complement each other.In order to improve the effective rate of utilization of terminal antenna space resources, user terminal need to be integrated in many services on the same antenna.Because different communication service is different to the requirement of directional diagram and polarization, the multifrequency antenna of traditional single port feed can not meet the demand of Multi-Function Antenna.An exemplary is 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 to be known vehicle position by global positioning system (GPS).
The information of vehicles that intelligent transportation system (ITS) is collected on highway is implemented point duty and control, reach reduce duration of congestion, reduce traffic accident, the object of go on a journey convenient and protection of the environment.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 short haul connection service (DSRCS) to ITS by 5.8GHz frequency allocation of China and U.S.A.And in Britain, the undelegated 5.470-5.725GHz frequency range of global radio access technology (WiMAX) is also considered to the possible candidate's frequency range of ITS.According to the standard of Institute of Electrical and Electric Engineers (IEEE), ITS service must be passed through global positioning system (GPS) time service, thereby obtains synchronised clock.Therefore, automotive electronics market is simple and compact for structure to researching and developing, GSP/ITS Multi-Function Antenna has active demand cheaply.
GPS global positioning system is U.S.'s second generation satellite navigation system, is widely used in 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.In GSP user terminal, most important receiving-member is gps antenna, and the quality of its performance will directly determine the transmitting-receiving performance of GPS terminal.Traditional gps antenna often adopts wall helical structure, stretches out four spiral metal arms and uses as antenna.Wall helical antenna bulky, section is high, is not suitable in car antenna, is also unfavorable for that same ITS antenna is integrated.Therefore, the technical problem solving in the urgent need to those skilled in the art is at present exactly: how can innovate and to propose a kind of novel GPS/ITS Multi-Function Antenna, meet the demand of vehicle-mounted ITS service.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of coplanar integrated GPS/ITS antenna, simultaneously towards the application of global positioning system (GPS) and intelligent transportation system (ITS), meet terminal antenna manufacture craft simply, the requirement of low cost, low section.
In order to address the above problem, the invention discloses a kind of coplanar integrated GPS/ITS antenna, 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 polytetrafluoroethylmaterial material, dielectric constant is 2.65, loss tangent angle is 0.002, thickness is 3mm, size is 100mm × 100mm, the thickness of substrate double-sided copper-clad is 0.07mm,
The terminal of described microstrip feed line (5) is connected with floor (4) short circuit by short circuit through hole (6).
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), between square paster (3) and Q-RING paster (2), is etched with gap.
Preferably, the terminal of described microstrip feed line (5) is connected with floor (4) short circuit by short circuit through hole (6).
Preferably, one end of described ITS signal feed port (9) is connected 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 are all coplanar.
Compared with prior art, the present invention has the following advantages:
The invention provides a kind of coplanar integrated GPS/ITS antenna, simultaneously towards the application of global positioning system (GPS) and intelligent transportation system (ITS), meet terminal antenna manufacture craft simply, the requirement of low cost, low section.Described antenna is limited in spatial volume 55 × 55 × 3mm
3in, be applicable to being very much placed in the top of transit equipment.This coplanar integrated GPS/ITS Multi-Function Antenna can produce a right-handed circular polarization signal that meets 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.In realization, only adopted common printed circuit doubling plate, manufacture craft is simple, cost is low, and all structures of antenna are all coplanar, is applicable to being very much placed in the top of transit equipment.
Simultaneously, the method for designing of coplanar integrated GPS/ITS Multi-Function Antenna provided by the invention, not only can GPS/ITS in 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 vocational work frequency.
In addition, the present invention, for popularization and the industrialization of ITS service provide good support, promotes the development of ITS antenna technology, allows the multifunctional vehicle mounted antenna of miniaturization, coplanar easy installation become a reality.
Brief description of the drawings
Fig. 1 is the three-dimensional representation intention of coplanar integrated GPS/ITS antenna provided by the invention;
Fig. 2 is that the A of Fig. 1 is vertical view to view;
Fig. 3 is that the B of Fig. 1 is central cross-section figure to view;
Fig. 4 be A, the B of Fig. 1 to the embodiment dimensional drawing of view structure, unit be millimeter (mm);
Fig. 5 is the GPS feed port reflection coefficient (S11) of coplanar integrated GPS/ITS Multi-Function Antenna 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 coplanar integrated GPS/ITS Multi-Function Antenna of Fig. 4 embodiment;
Fig. 7 is the survey map of the coplanar integrated GPS/ITS Multi-Function Antenna interport isolation of the embodiment of Fig. 4: (a) interport isolation of GPS L2 frequency range; (b) interport isolation of ITS frequency range;
Fig. 8 is the power gain directional diagram of the GPS feed port of the coplanar integrated GPS/ITS Multi-Function Antenna of the embodiment of Fig. 4 while working in 1227MHz: (--: 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;
Fig. 9 is the power gain directional diagram of the ITS feed port of the coplanar integrated GPS/ITS Multi-Function Antenna of the embodiment of Fig. 4 while working in 5800MHz: (
: 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, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
With reference to Fig. 1, Fig. 2 and Fig. 3, show a kind of coplanar integrated GPS/ITS antenna 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 is two-layer containing upper surface and lower surface; By method Q-RING paster 2, square paster 3, microstrip-fed 5 upper surfaces of processing at microwave-medium substrate 1 of etching; The lower surface of microwave-medium substrate 1 is metal, i.e. floor 4;
The terminal of microstrip feed line 5 is connected with floor 4 short circuits by short circuit through hole 6;
One end of gps signal feed port 8 and microstrip feed line 5 join, and the other end and floor 4 join;
One end of ITS signal feed port 9 is connected with the square paster 2 of upper surface by apex drive probe 7, and the other end and floor 4 join;
Technical scheme of the present invention realize thought: realize GPS/ITS Multi-Function Antenna, must obtain the right-handed circular polarization directional diagram that covers GPS frequency range and the perpendicular polarization omni-directional pattern that covers ITS frequency range.The method for designing that the novel coplanar capacity coupled single port of the present invention encourages realizes circular polarization, encourage the row wave mode of Q-RING paster 2 by the be coupled mode of feed of the microstrip feed line 5 of terminal short circuit, thereby obtain GPS right-handed circular polarization signal, its mode of operation is seen the approximate directional coupler of thinking.In order to obtain the perpendicular polarization omni-directional pattern that covers ITS frequency range, encourage square paster 3 by apex drive probe 7, it is operated under TM02 pattern.TM02 pattern is the radial transmission line pattern of paster antenna, and directional diagram is similar to monopole, i.e. required perpendicular polarization omni-directional pattern.But TM02 pattern is higher mode, Q value is high, and impedance bandwidth is narrow, can not meet and cover ITS frequency range completely.In order to widen the bandwidth of ITS antenna, by Q-RING paster 2 ring sets on square paster 3.Square paster 3 is coupled by gap and Q-RING paster 2, and Q-RING paster 2 is also operated under TM02 pattern, thereby obtains double resonance in ITS frequency range, thereby strengthens the bandwidth of ITS antenna.
This structure is described as follows:
Realize GPS right-handed circular polarization antenna, 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 by regulating the width of microstrip feed line 5 and realizing the impedance matching of GPS feed port 8 with the distance of Q-RING paster; Finally by regulating microstrip feed line 5 length to regulate the axial ratio coefficient of its directional diagram;
Realize ITS vertical depolarized omnidirectional antenna, 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 changing the diameter of apex drive probe 7; Then, regulate the gap size of square paster 3 and Q-RING paster, change their stiffness of coupling, realize the double resonance in 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 loss tangent angle is 0.002, and thickness is 3mm, and size is 100mm × 100mm; GPS feed port and ITS feed port all adopt SMA head, and characteristic impedance is 50 Ω; As shown in Figure 4, unit is millimeter (mm) to all the other each part sizes.
The GPS feed port reflection coefficient (S11) of coplanar integrated GPS/ITS Multi-Function Antenna of the embodiment made from Fig. 4 illustrated dimension and the test result of axial ratio coefficient are as shown in Figure 5, the bandwidth of the return loss S11<-10dB of this gps antenna 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 coplanar integrated GPS/ITS Multi-Function Antenna of the embodiment made from Fig. 4 illustrated dimension as shown in Figure 6, the bandwidth of the return loss S11<-10dB of this ITS antenna is 5550-6570MHz(1020MHz, 17.5%).
With the test result of the coplanar integrated GPS/ITS Multi-Function Antenna interport isolation 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 is all higher than 20dB.
Power gain directional diagram when the GPS feed port of the coplanar integrated GPS/ITS Multi-Function Antenna of the embodiment made from Fig. 4 illustrated dimension works in 1227MHz is as shown in 8.In X-Z plane and Y-Z plane, the main radiation direction of gps antenna is pointed to top, and in 3dB wave beam bandwidth, cross polarization is all better than 20dB, has good right-handed circular polarization characteristic.In the scope of GPS L2 frequency range (1.227GHz), antenna gain is 5.4dBi.
Power gain directional diagram while working in 5800MHz with the ITS feed port of the coplanar integrated GPS/ITS Multi-Function Antenna of the embodiment of Fig. 4 as shown in Figure 9.Can find out, ITS antenna is radiation zero in top orientation, and main lobe direction is 40 °, has good perpendicular polarization omni-directional pattern, and in 3dB wave beam bandwidth, cross polarization is all better than 20dB.In ITS band limits, antenna gain is 5.3～6.0dBi.
Known, it is good that described antenna is realized the impedance matching of coplanar integrated GPS/ITS Multi-Function Antenna, can produce a right-handed circular polarization signal that meets 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 are all coplanar, is applicable to being very much placed in the top of transit equipment.The present invention, for popularization and the industrialization of ITS service provide good support, promotes the development of ITS antenna technology, allows the multifunctional vehicle mounted antenna of miniaturization, coplanar easy installation become a reality.
The method for designing of coplanar integrated GPS/ITS Multi-Function Antenna provided by the invention, not only can GPS/ITS in 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 vocational work frequency.Manufacture craft of the present invention is simple, and cost is low, has realized the coplanar integrated of gps antenna and ITS antenna, and has met the structural requirement of low section, coplanar easy installation, and antenna stabilization is good, has very high practical value.
Above a kind of coplanar integrated GPS/ITS antenna provided by the present invention is described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (1)
1. a coplanar integrated GPS/ITS antenna, 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 square paster (3) is positioned at the center of microwave-medium substrate (1) upper surface, it is evenly surrounded by Q-RING paster (2), between square paster (3) and Q-RING paster (2), is etched with gap;
Described square microwave-medium substrate (1) is polytetrafluoroethylmaterial material, and dielectric constant is 2.65, and 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;
The size of described Q-RING paster (2) is 55mm × 55mm, the size of described square paster (3) is 34mm × 34mm, described Q-RING paster (2) is 1mm with the gap of described square paster (3), the length of described microstrip-fed (5) is that 63mm, width are 3mm, described microstrip-fed (5) are 1.1mm with the gap of described square paster (3), and the diameter of described apex drive probe (7) is 1.3mm;
The terminal of described microstrip feed line (5) is connected with floor (4) short circuit by short circuit through hole (6);
One end of described gps signal feed port (8) and the microstrip feed line (5) of upper surface join, and the other end and floor (4) join;
One end of described ITS signal feed port (9) is connected with the square paster (2) of upper surface by apex drive probe (7), and the other end and floor (4) join;
Gps signal feed port (8) and ITS signal feed port (9) all adopt SMA head, and characteristic impedance is 50 Ω;
The integrated of gps antenna and ITS antenna adopted common printed circuit doubling plate to realize, and described Q-RING paster (2), and square paster (3) and microstrip-fed (5) are coplanar.
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| WO2015027378A1 (en) * | 2013-08-26 | 2015-03-05 | 华为技术有限公司 | Broadband dual-polarized array antenna and base station |
| CN103630757A (en) * | 2013-11-20 | 2014-03-12 | 江苏大学 | Three-frequency band mobile phone radiation intensity indicator |
| 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 |
| CN106711605B (en) * | 2015-07-27 | 2024-03-01 | 莫仕无线技术(上海)有限公司 | Multiband vehicle-mounted antenna assembly |
| CN106025534B (en) * | 2016-07-13 | 2019-02-12 | 苏州卡基纳斯通信科技有限公司 | A kind of multifrequency Beidou high-precision antenna |
| CN111224218B (en) * | 2020-01-09 | 2021-08-20 | 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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| CN101106215B (en) * | 2007-08-20 | 2011-04-20 | 哈尔滨工程大学 | Half U type open slot overlapping wide frequency band micro band antenna |
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| CN101740870A (en) * | 2009-12-28 | 2010-06-16 | 中国电子科技集团公司第二十六研究所 | Miniaturized single feed point dual-frequency and dual-polarization microstrip antenna |
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