CN103633444B - For the coupling array microstrip antenna of triones navigation system - Google Patents
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- CN103633444B CN103633444B CN201310615718.7A CN201310615718A CN103633444B CN 103633444 B CN103633444 B CN 103633444B CN 201310615718 A CN201310615718 A CN 201310615718A CN 103633444 B CN103633444 B CN 103633444B
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- 229910052802 copper Inorganic materials 0.000 claims abstract description 48
- 239000010949 copper Substances 0.000 claims abstract description 48
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Abstract
For the coupling array microstrip antenna of triones navigation system, relate to a kind of microstrip antenna.There is provided a kind of high-gain, the low elevation angle, small size, low axial ratio, high Phase center stability, the coupling array microstrip antenna for triones navigation system of the descending S frequency range of the Big Dipper.Be provided with one side copper clad layers substrate, one side copper clad layers substrate is provided with square copper conductor surface antenna paster, be provided with rectangle coupling array in square copper conductor surface antenna paster surrounding, in square copper conductor surface antenna paster, be provided with symmetrical outer groove, middle level groove and inner layer groove; Square copper conductor surface antenna paster is provided with power feed hole.
Description
Technical field
The present invention relates to a kind of microstrip antenna, especially relate to a kind of coupling array microstrip antenna for triones navigation system.
Background technology
The Bei Wei star Dao that struggles against navigates Xi Tong ﹝ BeiDou(COMPASS) Navigation Satellite System ﹞ be China implementing independent development capability, independent operating GPS (Global Position System), be except the 4th ripe satellite navigation system after GPS, GLONASS, GALILEO.This system is devoted to provide high-quality location, navigation, time service and communication service to Global Subscriber.According to plan, Beidou satellite navigation system provides formal service to Asia-Pacific most area at the beginning of 2013.About the year two thousand twenty, Beidou satellite navigation system forms Global coverage ability.Beidou satellite navigation system by space segment, ground segment and user segment three part form, space segment comprises 5 satellites and 30 non-geo satellites, ground segment comprises several ground stations such as master station, injection station and monitoring station, and user segment comprises Big Dipper user terminal and the terminal with other satellite navigation system compatibilities.Dipper system is used widely at numerous areas such as traffic, fishery, the hydrology, meteorology, forestry, communication, electric power, rescues, and registered user has reached 60,000, creates significant Social benefit and economic benefit.It will become national economy new growth point, to lifting Social Informatization Level, promote that sustainable economic development, raising people's living standard, the enhancing aspect such as public safety and national defense safety all will produce far-reaching influence, and have great strategic meaning.
Because big-dipper satellite adopts geostationary satellite, distance earth surface is distant, and the Big Dipper satellite signal therefore arriving ground is very faint.Meanwhile, big-dipper satellite launching antenna array is shaped-beam, and the precision of the beam signal at the low elevation angle to location has larger contribution, thus requires certain elevation angle.Generally, its terminal antenna has following requirement:
1. phase pattern and phase center.In big-dipper satellite navigation system, due to the phase difference of the antenna output end of different angles on its satellite, certain position error can be produced, unacceptable for the user that required precision is high, therefore provide in the region of service for satellite, antenna should provide uniform amplitude-frequency response and phase response.The Phase center stability of antenna is relevant with feeding classification to the form of antenna.In general, the symmetry of antenna is better, and the stability of its phase center is higher.This antenna, ensure that the stability of the phase center of antenna from design.
2. amplitude pattern and gain.In the navigation positioning system course of work, if when the satellite angle of pitch is lower than setting, its receiver antenna will can not receive signal.Meanwhile, in order to avoid serious tropospheric and multipath effect as far as possible, improve the directive gain on antenna effective angle.For Beidou navigation satellite, require the low elevation gain improving antenna, namely there is the directional diagram compared with wide beamwidth.
3. frequency and polarization.Current existing satellite navigation system operating frequency is different, but all requires that polarization characteristic is circular polarization.The Beidou satellite navigation system of China works in up L frequency range (wherein working frequency points L1:1610-1626.5MHz compensates frequency L2:1227.6MHz), and this frequency range adopts left-hand circular polarization; Descending S frequency range (wherein working frequency points: 2483.5-2500MHz), this frequency range adopts right-handed circular polarization.But, in locating more accurately, in order to compensate the time delay caused in ionospheric propagation process, general employing double frequency or multiple-frequency operation.Therefore, this just requires that terminal antenna all has good service behaviour in each frequency.
In sum, in the design process of Beidou satellite navigation system terminal reception antenna, tackle following requirement and consider accordingly: the frequency of terminal reception antenna should drop in the frequency range of Beidou satellite navigation system; Its antenna polarization characteristics is circular polarization, can receive the Big Dipper satellite signal from aerial polarization, any direction arbitrarily.
Microstrip antenna, as a kind of novel antenna, compared with ordinary antennas, has irreplaceable advantage.It has that volume is little, lightweight, planar structure is simple, be easy to realize the feature such as circular polarization and double frequency; In addition, microstrip antenna also has the characteristic such as compact conformation, stable performance, wieldy printed circuit technique and manufacturing technology in enormous quantities.
For the micro-band circular polarized antenna of major part of work at present, conventional micro-band circular polarized antenna size is general larger, even if reach miniaturized by inserting Shorted post and some other means, make the complex structure of antenna, the circular polarization characteristics of antenna simultaneously, as axial ratio, the elevation angle etc. are excessive, antenna is made to be difficult to reach optimum performance.
Data shows, there are no people, array couples technology and phase center Stability Design is applied in the design of Beidou antenna.
Summary of the invention
The object of the present invention is to provide a kind of high-gain, the low elevation angle, small size, low axial ratio, high Phase center stability, the coupling array microstrip antenna for triones navigation system of the descending S frequency range of the Big Dipper.
The present invention is provided with one side copper clad layers substrate, one side copper clad layers substrate is provided with square copper conductor surface antenna paster, be provided with rectangle coupling array in square copper conductor surface antenna paster surrounding, in square copper conductor surface antenna paster, be provided with symmetrical outer groove, middle level groove and inner layer groove; Square copper conductor surface antenna paster is provided with power feed hole.
Described one side copper clad layers substrate can adopt relative dielectric constant be 9.8 ± 5% composite ceramics dielectric-slab.The length of one side copper clad layers substrate can be 25.32 ± 0.01mm, and width can be 25.32 ± 0.01mm, and thickness can be 3 ± 0.01mm.
The size of described square copper conductor surface antenna paster can be 15.99 ± 0.01mm × 2.67 ± 0.01mm, and wherein both sides are corner cut, and length is 2.26 ± 0.01mm.
The size of described rectangle coupling array can be 15.99 ± 0.01mm × 15.99 ± 0.01mm, and the distance of rectangle coupling array and square copper conductor surface antenna paster is 1.07 ± 0.01mm; The size of outer groove can be 9.14 ± 0.01mm × 0.80 ± 0.01mm; Middle level groove is bending groove, and the brachium of middle level groove can be 4.81 ± 0.01mm, and two-arm is isometric, and the spacing of middle level groove and outer groove can be 0.86 ± 0.01mm, and the Edge Distance of outer groove and square copper conductor surface antenna paster can be 0.73 ± 0.01mm; The size of inner layer groove can be 5.33 ± 0.01mm × 0.80 ± 0.01mm, and the spacing of inner layer groove and middle level groove can be 0.81 ± 0.01mm.
The size of described power feed hole can be 0.5 ± 0.01mm, highly can be 3 ± 0.01mm.The centre distance of power feed hole and square copper conductor surface antenna paster can be 2.65 ± 0.01mm.
The present invention adopts the form feed of copper axis offset-fed, and this feed form makes the S11 of antenna lower, and gain increases.Wherein, the inner core of copper axis is connected with upper surface rectangle post-chip by feedback hole, and the outer core of copper axis is connected with the reflecting plate of composite ceramics dielectric-slab lower surface.
Size of the present invention can be designed to 25.32mm ± 0.1mm × 25.3 ± 0.1mm size, is 10% of the size of conventional microstrip antenna, reaches the object of miniaturized Beidou antenna.Meanwhile, the present invention has extraordinary low elevation angle characteristic, and centre frequency axial ratio 1.2,3dB axial ratio bandwidth reaches 15MHz, and the return loss (S11) of centre frequency can reach below-35dB.The present invention can put it in Beidou navigation terminal completely, and has that structure is simple, cost is low, performance is good and be easy to the advantage such as integrated.Of the present invention two large main features are: one is adopt array couples to reach low elevation angle object, and two is adopt grooving techniques and high-k substrate to reach miniaturized object, makes overall antenna size only have about 25mm.
The present invention forms primarily of two parts, and one is main paster, the main radiation producing respective frequencies; Two is coupling arrays, mainly regulates the elevation angle performance of main paster.Main paster adopts square corner cut structure to produce circular polarization, adopts grooving techniques reduction antenna size.
This array couples technology that the present invention adopts makes the elevation angle of antenna diminish, and antenna is close the gain of 0 and 90 °, close to hemisphere gain, has good low elevation angle performance, and on paster, fluting forms gap array simultaneously, reduces antenna size.Compared with existing circular polarization microstrip antenna, the array couples structure that the present invention adopts can improve the elevation angle performance of antenna well.Coupling array mechanism is applied on micro-strip paster antenna, the radiation characteristic of antenna at half-plane can be promoted well, and suppress it in the radiation of lower half-plane.And employing symmetrical structure, the width of the cell body in every one deck is also formed objects, therefore the present invention has very high Phase center stability.The present invention can also expand to other antennas in engineer applied, has great significance to engineer applied.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is return loss of the present invention (S11) performance map.
Fig. 3 is the axial ratio figure of the present invention in frequency band.
Fig. 4 is E face and the H side gains directional diagram of 2.492GHz of the present invention.In the diagram, curve a is E plane, and curve b is H plane.
Embodiment
Following examples will be described further technical scheme of the present invention and outstanding effect thereof by reference to the accompanying drawings.
See Fig. 1 ~ 3, the embodiment of the present invention is provided with one side copper clad layers substrate 1, one side copper clad layers substrate 1 is provided with square copper conductor surface antenna paster 3, be provided with rectangle coupling array 2 in square copper conductor surface antenna paster 3 surrounding, in square copper conductor surface antenna paster 3, be provided with symmetrical outer groove 4, middle level groove 5 and inner layer groove 6; Square copper conductor surface antenna paster 3 is provided with power feed hole 7.
Described one side copper clad layers substrate 1 adopt relative dielectric constant be 9.8 ± 5% composite ceramics dielectric-slab.The length of one side copper clad layers substrate 1 is 25.32 ± 0.01mm, and width is 25.32 ± 0.01mm, and thickness is 3 ± 0.01mm.
The size of described square copper conductor surface antenna paster 3 is 15.99 ± 0.01mm × 2.67 ± 0.01mm, and wherein both sides are corner cut, and length is 2.26 ± 0.01mm.
The size of described rectangle coupling array 2 is 15.99 ± 0.01mm × 15.99 ± 0.01mm, and rectangle coupling array 2 is 1.07 ± 0.01mm with the distance of square copper conductor surface antenna paster 3; The size of outer groove 4 is 9.14 ± 0.01mm × 0.80 ± 0.01mm; Middle level groove 5 is bending groove, and the brachium of middle level groove 5 is 4.81 ± 0.01mm, and two-arm is isometric, and middle level groove 5 is 0.86 ± 0.01mm with the spacing of outer groove 4, and outer groove 4 is 0.73 ± 0.01mm with the Edge Distance of square copper conductor surface antenna paster 3; The size of inner layer groove 6 is 5.33 ± 0.01mm × 0.80 ± 0.01mm, and inner layer groove 6 is 0.81 ± 0.01mm with the spacing of middle level groove 5.
The size of described power feed hole 7 is 0.5 ± 0.01mm, is highly 3 ± 0.01mm.Power feed hole 7 is 2.65 ± 0.01mm with the centre distance of square copper conductor surface antenna paster 3.
Adopt the form feed of copper axis offset-fed in the present invention, this feed form makes the S11 of antenna lower, and gain increases.Wherein, the inner core of copper axis is connected with upper surface rectangle post-chip by feedback hole, and the outer core of copper axis is connected with the reflecting plate of composite ceramics dielectric-slab lower surface.
As can be seen from Figure 2, working frequency range of the present invention can be 2.47 ~ 2.52GHz.The return loss (S11) of this working frequency range internal antenna, all at below 10dB, is-35dB in the minimum echo loss at 2.51GHz place.As can be seen from above, requirement can be reached in the return loss performance of whole passband internal antenna.The present invention is respectively 55M and 2.1% at the absolute bandwidth of 2.492GHz and relative bandwidth; Stable performance and can directed radiation, thus can be advantageously applied in the satellite communication system such as the Big Dipper and GPS.
See Fig. 3, the present invention, in Beidou navigation downstream bands 2.487 ~ 2.497GHz, has good axial ratio performance, all at below 3dB.
See Fig. 4, be E face directional diagram and H face directional diagram.As seen from Figure 4, the present invention has directional radiation properties, can meet the requirement of satellite communication system.Also can find out simultaneously antenna reach in the direction of 0dB ± 60 °, have good low elevation angle characteristic, elevation angle performance is very outstanding.Meanwhile, if strengthen the size of dielectric-slab, the directive gain of antenna can be increased.
Manufacture mismachining tolerance of the present invention on the situation that affects of antenna performance see table 1.
Table 1
In sum, the present invention adopts array couples microstrip antenna Technology design antenna, and as can be seen from return loss (S11) performance map of antenna, antenna has covered this frequency band of 2.474 ~ 2.529GHz, reaches the job requirement of the up S frequency range of the Big Dipper.As can be seen from simulated radiation figure and E face directional diagram and H face directional diagram, antenna has low elevation angle characteristic well.
Claims (7)
1. for the coupling array microstrip antenna of triones navigation system, it is characterized in that being provided with one side copper clad layers substrate, one side copper clad layers substrate is provided with square copper conductor surface antenna paster, be provided with rectangle coupling array in square copper conductor surface antenna paster surrounding, in square copper conductor surface antenna paster, be provided with symmetrical outer groove, middle level groove and inner layer groove; Square copper conductor surface antenna paster is provided with power feed hole; The size of described outer groove is 9.14 ± 0.01mm × 0.80 ± 0.01mm; Middle level groove is bending groove, and the brachium of middle level groove is 4.81 ± 0.01mm, and two-arm is isometric, and the spacing of middle level groove and outer groove is 0.86 ± 0.01mm, and the Edge Distance of outer groove and square copper conductor surface antenna paster is 0.73 ± 0.01mm; The size of inner layer groove is 5.33 ± 0.01mm × 0.80 ± 0.01mm, and the spacing of inner layer groove and middle level groove is 0.81 ± 0.01mm.
2., as claimed in claim 1 for the coupling array microstrip antenna of triones navigation system, it is characterized in that described one side copper clad layers substrate employing relative dielectric constant is the composite ceramics dielectric-slab of 9.8 ± 5%.
3., as claimed in claim 1 or 2 for the coupling array microstrip antenna of triones navigation system, it is characterized in that the length of described one side copper clad layers substrate is 25.32 ± 0.01mm, width is 25.32 ± 0.01mm, and thickness is 3 ± 0.01mm.
4., as claimed in claim 1 for the coupling array microstrip antenna of triones navigation system, it is characterized in that the size of described square copper conductor surface antenna paster is 15.99 ± 0.01mm × 2.67 ± 0.01mm, wherein both sides are corner cut, and length is 2.26 ± 0.01mm.
5. as claimed in claim 1 for the coupling array microstrip antenna of triones navigation system, it is characterized in that the size of described rectangle coupling array is 15.99 ± 0.01mm × 15.99 ± 0.01mm, the distance of rectangle coupling array and square copper conductor surface antenna paster is 1.07 ± 0.01mm.
6., as claimed in claim 1 for the coupling array microstrip antenna of triones navigation system, it is characterized in that the size of described power feed hole is 0.5 ± 0.01mm, is highly 3 ± 0.01mm.
7. as described in claim 1 or 6 for the coupling array microstrip antenna of triones navigation system, it is characterized in that the centre distance of described power feed hole and square copper conductor surface antenna paster is 2.65 ± 0.01mm.
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| CN201310615718.7A CN103633444B (en) | 2013-11-27 | 2013-11-27 | For the coupling array microstrip antenna of triones navigation system |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109863644B (en) * | 2016-10-19 | 2021-04-16 | 株式会社村田制作所 | Antenna element, antenna module, and communication device |
| CN107275807B (en) * | 2017-06-22 | 2021-01-08 | 昆山睿翔讯通通信技术有限公司 | Communication terminal structure integrating millimeter wave antenna and navigation antenna |
| CN107732459A (en) * | 2017-08-16 | 2018-02-23 | 电子科技大学 | A kind of miniaturization paster antenna |
| CN108832275B (en) * | 2018-07-24 | 2023-08-01 | 厦门大学嘉庚学院 | Mobile digital television induction array four-spiral antenna |
| CN109524777B (en) * | 2018-10-22 | 2020-07-07 | 南京尤圣美电子科技有限公司 | Circular polarization microstrip antenna with composite slotting structure |
| CN109687133B (en) * | 2019-01-08 | 2024-02-20 | 国网福建省电力有限公司南平供电公司 | Miniaturized big dipper satellite terminal antenna |
| CN112216989B (en) * | 2020-09-02 | 2022-05-13 | 珠海格力电器股份有限公司 | Ultra-wideband WIFI microstrip antenna, amplification method and small WIFI equipment |
| CN112909558A (en) * | 2021-01-18 | 2021-06-04 | 华南理工大学 | Laminated patch antenna based on radiation regulation and control and communication equipment |
| CN113851863B (en) * | 2021-11-29 | 2022-02-18 | 北京信诺飞图科技有限公司 | Miniaturized wide-beam multi-frequency integration receiving and transmitting integrated Beidou antenna based on bent arrays |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157798A (en) * | 2011-02-18 | 2011-08-17 | 厦门大学 | Beidou rectangular ceramic micro-strip antenna based on slot array |
| CN103401069A (en) * | 2013-08-20 | 2013-11-20 | 厦门大学 | Composite slit leading dual-band and double-fed microstrip antenna with low elevation and high gain |
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| US7501990B2 (en) * | 2007-05-01 | 2009-03-10 | Laird Technologies, Inc. | Dual band slot array antenna above ground plane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157798A (en) * | 2011-02-18 | 2011-08-17 | 厦门大学 | Beidou rectangular ceramic micro-strip antenna based on slot array |
| CN103401069A (en) * | 2013-08-20 | 2013-11-20 | 厦门大学 | Composite slit leading dual-band and double-fed microstrip antenna with low elevation and high gain |
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