CN102916263A - Multi-mode antenna for satellite navigation - Google Patents
Multi-mode antenna for satellite navigation Download PDFInfo
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- CN102916263A CN102916263A CN2012104213629A CN201210421362A CN102916263A CN 102916263 A CN102916263 A CN 102916263A CN 2012104213629 A CN2012104213629 A CN 2012104213629A CN 201210421362 A CN201210421362 A CN 201210421362A CN 102916263 A CN102916263 A CN 102916263A
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Abstract
The invention discloses a multi-mode antenna for satellite navigation. The integral multi-mode antenna is divided into a first layer, a second layer, a third layer, a fourth layer and a fifth layer which are sequentially arranged from top to bottom. The first layer is a radiating layer and is of a double-layer short-circuit patch structure, an upper-layer patch of the radiating layer is positioned on the top of a first layer of dielectrics, and a lower-layer patch is positioned at the bottom of the first layer of dielectrics and is connected with the upper-layer patch by a short-circuit arm; the second layer is a dielectric layer for supporting the radiating layer and is positioned between a feed probe and the lower-layer patch; the third layer is an L-shaped probe feed layer and comprises four L-shaped probes, a horizontal portion of the third layer is printed on a dielectric layer, and a perpendicular portion of the third layer penetrates through the dielectric layer to be connected with a secondary feed network; the fourth layer is a secondary dielectric strip-line feed network layer and comprises two broadband 90-degree phase shifters; the fifth layer is a primary dielectric strip-line feed network layer and comprises a broadband 180-degree phase shifter; and the fourth layer is connected with the fifth layer by a metal probe. The antenna has the advantages of good low-elevation axial ratio characteristic and high multi-path interference resistance.
Description
Technical field
The invention belongs to radar electric systems technology field, relate to a kind of multimodal satellite navigation antenna, be specifically related to broadband, miniaturization, broad beam, wide angle elevation axis than multimodal satellite navigation antenna.
Background technology
Society, the science and technology develop rapidly so that the electronic information epoch society arrive in advance.In Position Fixing Navigation System, the terrestrial radio navigation system that tradition is used because the problem such as the range of signal of its covering is limited, positioning accuracy is lower, is difficult to support the requirement of modern society's navigation, aviation, land vehicle and military pinpoint accuracy location navigation.High, the fireballing satellite navigation system of positioning accuracy just develops rapidly for this reason.
Along with the application popularization of the satellite positioning navigation technology that develops rapidly, many countries have all set up the satellite navigation system of oneself.At present, the GPS of the U.S., Muscovite GLONASS is widely used, and the Compass of the Galileo in Europe and China has also all served society.Because every kind of navigation system is limited in the satellite distribution in space, can not cover tellurian All Ranges, so its location navigation precision and security reliability and availability also all have been subject to restriction, therefore following NAVSTAR is in order to improve the problem of positioning accuracy and solution triangular web coverage hole, will adopt the mutually pattern of compatibility of multiple satellite navigation system, and as vital component units-antenna in the satellite navigation system, the performance to satellite navigation system is in some sense played decisive role.Therefore the terminal antenna of studying the excellent performance of a kind of compatible multi-mode satellite positioning navigation system is of great immediate significance.
Usually satellite navigation aerial adopts microstrip antenna and four-arm spiral antenna dual mode.The shortcoming of microstrip antenna is that working band is narrow, and low elevation gain and axial ratio characteristic are poor; The shortcoming of four-arm spiral antenna is that size is large, is difficult for conformal.
Summary of the invention
The object of the invention is to overcome the deficiency of normally used two kinds of antenna forms in the satellite navigation system, a kind of multimodal satellite navigation antenna is proposed, the working band of this antenna satisfies the bandwidth requirement of current all main flow satellite navigation systems, has solved the Antenna Design problem that broadband, low profile, wide angle elevation axis ratio, broad beam cover.
Its technical scheme is:
A kind of multimodal satellite navigation antenna, being divided into is five layers, is followed successively by from top to bottom:
Ground floor is radiating layer, adopts double-deck short-circuit patch structure, and the upper strata paster is positioned at the top of ground floor medium, and lower floor's paster is positioned at the bottom of ground floor medium, and paster connects by the short circuit arm up and down;
Second layer dielectric support radiating layer is between feed probes and lower floor's paster;
The 3rd layer is L-type probe feed layer, is comprised of four L-type probes, and horizontal component is printed on dielectric layer, and vertical component passes dielectric layer and is connected with secondary feeding network;
The 4th layer is secondary media band line feeding network layer, is comprised of the 90 ° of phase shifters in two secondary broadbands;
Connect with metal probe between the 4th layer and the layer 5, the dielectric layer fluting at top, feeding network isolation resistance place is so that the feeding network dielectric layer is airtight good.
Described radiating layer at the middle and upper levels patch size greater than the radiation patch size of bottom.
In the described L-type probe feed layer, horizontal component is the operplate printing band of rectangle, and vertical component is that metal probe is connected with feeding network.
Described the 4th layer and the 4th layer adopt and add λ/8 open circuit and short circuit minor matters structures, and frequency band range differs in the scope of 180 ° ± 5 ° and 90 ° ± 5 ° in the scope of 1.1-1.6GHz.
The present invention's beneficial effect compared with prior art
(1) the present invention can satisfy the bandwidth requirement of multimodal satellite navigation system.
(2) the present invention adopts microstrip structure, and compact conformation is easily conformal.
(3) antenna beamwidth of the present invention is wide, and low elevation gain is high.
(4) live width angle, sky of the present invention elevation axis specific characteristic is good, and the anti-multipath interference performance is strong.
Description of drawings
Fig. 1 is the circular patch antenna structural representation;
Fig. 2 is four feed circular polarized antenna schematic diagrams;
Fig. 3 is that multipath disturbs schematic diagram;
Fig. 4 is the surface wave propagation performance plot;
Fig. 5 is the structural representation of antenna of the present invention;
Fig. 6 is antenna feeding network structure chart of the present invention, wherein the elementary feeding network structure chart of Fig. 6 a; Fig. 6 b is secondary feeding network structure chart;
Fig. 7 is emulation and actual measurement standing wave pattern;
Fig. 8 is emulation and actual measurement axial ratio figure,
Fig. 9 is different frequency axial ratio directional diagram, and wherein Fig. 9 is 1.2GHz axial ratio directional diagram a), and Fig. 9 (b) is 1.4GHz axial ratio directional diagram, and Fig. 9 (c) is 1.6GHz axial ratio directional diagram;
Figure 10 is the different frequency far-field pattern, and wherein Figure 10 (a) is 1.2GHz actual measurement directional diagram, and Figure 10 (b) is 1.4GHz actual measurement directional diagram, and Figure 10 (c) is 1.6GHz actual measurement directional diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described further.
The present invention has used the operation principle of microstrip antenna and many distributing points circular polarization.As shown in Figure 1, circular patch antenna is to paste the thin conduction circular patch of one deck at dielectric substrate, and the back side of substrate is the floor.Electric field in the substrate only has the z component basically, and magnetic field only has x component and y component.Because h＜＜λ
0So the field is constant in the z-direction, and the normal direction current component of microstrip edge approaches zero in edge.This just means that edge's magnetic field tangential component goes to zero.Based on these supposition, can be modeled to a cylindrical cavity to Circular Microstrip Antennas.Its upper and lower bottom surface is electric wall, and the side is the magnetic wall.Therefore, in little band areas of dielectric, the field can be determined with the method for separating the cavity problem.
The mode of SF single feed is come phase shift with the method that degeneracy separates unit, and standing-wave ratio and axial ratio bandwidth are all narrow, usually only have about 10%; And the mode of many feeds is given feeding network with phase shift, and radiation fin is only paid close attention to the electric field that encourages polarization orthogonal, amplitude to equate, axial ratio bandwidth can improve greatly.Many feeds can be divided into the modes such as two feeds, three feeds, four feeds, and need different feeding networks.Fig. 2 is four feed circular polarized antenna schematic diagrams.
To disturb be the main source of GPS position error to multipath always for a long time, and the multipath signal of well-known satellite-signal mainly comes from ground return, reception antenna may be at the low elevation angle or the negative elevation angle these reflected signals receptions, as shown in Figure 3.In fact all surface waves can be decomposed into TE and two kinds of patterns of TM, and as shown in Figure 4, any type of surface wave all can't be propagated on this table surface, d=λ/4.Add a short circuit wall at the radiation fin center, short-circuited conducting sleeve as shown in Figure 5, this structure can the establishment higher mode, thereby reduces surface wave propagation.The short-circuited conducting sleeve radius answers one should satisfy following equation:
J
1(k
1a)/Y
1(k
1a)＝J＇
1(k
1x＇
11/k
TM0)/Y＇
1(k
1x＇
11/k
TM0)(1)
According to above basic thought, the antenna structure of design as shown in Figure 5, it is five layers that antenna is divided into.Ground floor is radiating layer from top to bottom, and the upper strata paster is positioned at the top of ground floor medium, and lower floor's paster is positioned at the bottom of ground floor medium, and the levels paster is by short circuit arm road; Second layer medium has played the effect of supporting radiating layer and isolation feed probes and lower floor's paster; The 3rd layer is L-type probe feed layer, and it is comprised of four L-type probes, and horizontal component is printed on dielectric layer, and vertical component passes dielectric layer and is connected with secondary feeding network; The 4th layer is secondary media band line feeding network layer, and it is comprised of the 90 ° of phase shifters in two secondary broadbands; Layer 5 is elementary medium belt line feeding network layer, and it is comprised of the 180 ° of phase shifters in a secondary broadband.
1, broadband operation
The present invention adopts broadband phase-shift network and L-type probe coupling feed structure, so that the antenna working band is wide, can satisfy the bandwidth requirement of current all main flow satellite navigation systems.
2, compact conformation
The present invention adopts bilayer zone line feeding network structure, has effectively reduced the size of feeding network, makes the antenna overall structure become compact.Primary and secondary medium belt line structure as shown in Figure 6.
3, improve low elevation axis ratio
The present invention adopts four distributing points to add broadband network configuration and short circuit arm configuration, has improved the low elevation axis specific characteristic of antenna.
4, improve low elevation gain
The present invention has adopted double-deck short-circuit patch as radiant body, and two-layered medium band line when reducing volume, has also improved beamwidth as feeding network, has improved low elevation gain.
Fig. 7 and Fig. 8 be the standing wave curve of antenna and greatest irradiation axis of orientation than curve, as can be seen from the figure, the bandwidth of VSWR＜2 is 50.8%, can be from 1.1 to 1.85GHz, the bandwidth of AR＜3 is 45.5%, can be from 1.07 to 1.7GHz.Standing wave and axial ratio bandwidth can cover the GNSS frequency range fully.Fig. 9 be antenna at the axial ratio directional diagram of different frequency X-Z and Y-Z face, can find out, antenna has excellent wide angle elevation axis specific characteristic.Figure 10 be antenna at the far-field pattern curve of different frequency X-Z and Y-Z face, can find out, at the elevation angle during greater than 10 °, the gain of antenna is all greater than-5dBi.
The above; only be the better embodiment of the present invention; protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art; in the technical scope that the present invention discloses, the simple change of the technical scheme that can obtain apparently or equivalence are replaced and are all fallen within the scope of protection of the present invention.
Claims (4)
1. a multimodal satellite navigation antenna is characterized in that, being divided into is five layers, is followed successively by from top to bottom:
Ground floor is radiating layer, adopts double-deck short-circuit patch structure, and the upper strata paster is positioned at the top of ground floor medium, and lower floor's paster is positioned at the bottom of ground floor medium, and paster connects by the short circuit arm up and down;
Second layer dielectric support radiating layer is between feed probes and lower floor's paster;
The 3rd layer is L-type probe feed layer, is comprised of four L-type probes, and horizontal component is printed on dielectric layer, and vertical component passes dielectric layer and is connected with secondary feeding network;
The 4th layer is secondary media band line feeding network layer, is comprised of the 90 ° of phase shifters in two secondary broadbands;
Layer 5 is elementary medium belt line feeding network layer, is comprised of the 180 ° of phase shifters in a secondary broadband;
Connect with metal probe between the 4th layer and the layer 5.
2. multimodal satellite navigation antenna according to claim 1 is characterized in that, described radiating layer at the middle and upper levels patch size greater than the radiation patch size of bottom.
3. multimodal satellite navigation antenna according to claim 1 is characterized in that, in the described L-type probe feed layer, horizontal component is the operplate printing band of rectangle, and vertical component is that metal probe is connected with feeding network.
4. multimodal satellite navigation antenna according to claim 1, it is characterized in that, described the 4th layer and the 4th layer adopt and add λ/8 open circuit and short circuit minor matters structures, and frequency band range differs in the scope of 180 ° ± 5 ° and 90 ° ± 5 ° in the scope of 1.1-1.6GHz.
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| CN2012104213629A CN102916263A (en) | 2012-10-21 | 2012-10-21 | Multi-mode antenna for satellite navigation |
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| CN2012104213629A CN102916263A (en) | 2012-10-21 | 2012-10-21 | Multi-mode antenna for satellite navigation |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594794A (en) * | 2013-11-20 | 2014-02-19 | 大连海事大学 | High-performance multi-mode active satellite navigation antenna |
| CN104882661A (en) * | 2015-06-01 | 2015-09-02 | 蒋振东 | Wide-beam circularly-polarized micro-strip antenna |
| CN105870620A (en) * | 2016-05-26 | 2016-08-17 | 电子科技大学 | Overlapping type multi-mode patch antenna applied to four-port MIMO system |
| CN106532257A (en) * | 2016-10-27 | 2017-03-22 | 西安合众思壮导航技术有限公司 | Antenna and communication system |
| CN107834176A (en) * | 2017-11-16 | 2018-03-23 | 西安电子科技大学 | A kind of narrow beam H-shaped slot-coupled Section of Microstrip Antenna Array |
| CN110265779A (en) * | 2019-07-23 | 2019-09-20 | 福州大学 | A kind of high low elevation gain satellite navigation terminal antennae of diesis shape broadband |
| CN110289484A (en) * | 2019-06-25 | 2019-09-27 | 广东盛路通信科技股份有限公司 | A kind of broadband navigation antenna |
| CN110492243A (en) * | 2019-09-20 | 2019-11-22 | 河北省鸿文通讯设备制造有限公司 | A kind of Novel high-isolation double polarized micro strip antenna |
| CN111600122A (en) * | 2020-05-13 | 2020-08-28 | 中天宽带技术有限公司 | Patch antenna |
| CN111641041A (en) * | 2020-05-20 | 2020-09-08 | 广州吉欧电子科技有限公司 | Integrated broadband GNSS antenna device |
| WO2021203529A1 (en) * | 2020-04-08 | 2021-10-14 | 南京步微信息科技有限公司 | Low-profile wideband antenna |
| CN114530692A (en) * | 2022-02-25 | 2022-05-24 | 京东方科技集团股份有限公司 | Antenna device, antenna system and communication system |
| CN114824766A (en) * | 2021-01-19 | 2022-07-29 | 大唐移动通信设备有限公司 | Multi-mode navigation antenna |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594794A (en) * | 2013-11-20 | 2014-02-19 | 大连海事大学 | High-performance multi-mode active satellite navigation antenna |
| CN103594794B (en) * | 2013-11-20 | 2015-10-28 | 大连海事大学 | A kind of High-performance multi-mode active satellite navigation antenna |
| CN104882661A (en) * | 2015-06-01 | 2015-09-02 | 蒋振东 | Wide-beam circularly-polarized micro-strip antenna |
| CN105870620A (en) * | 2016-05-26 | 2016-08-17 | 电子科技大学 | Overlapping type multi-mode patch antenna applied to four-port MIMO system |
| CN105870620B (en) * | 2016-05-26 | 2019-05-10 | 电子科技大学 | Superposed type multimode paster antenna applied to four port mimo systems |
| CN106532257A (en) * | 2016-10-27 | 2017-03-22 | 西安合众思壮导航技术有限公司 | Antenna and communication system |
| CN107834176A (en) * | 2017-11-16 | 2018-03-23 | 西安电子科技大学 | A kind of narrow beam H-shaped slot-coupled Section of Microstrip Antenna Array |
| CN110289484A (en) * | 2019-06-25 | 2019-09-27 | 广东盛路通信科技股份有限公司 | A kind of broadband navigation antenna |
| CN110289484B (en) * | 2019-06-25 | 2023-09-15 | 广东盛路通信科技股份有限公司 | Broadband navigation antenna |
| CN110265779A (en) * | 2019-07-23 | 2019-09-20 | 福州大学 | A kind of high low elevation gain satellite navigation terminal antennae of diesis shape broadband |
| CN110265779B (en) * | 2019-07-23 | 2024-02-06 | 福州大学 | Dual-cross broadband high-low elevation gain satellite navigation terminal antenna |
| CN110492243A (en) * | 2019-09-20 | 2019-11-22 | 河北省鸿文通讯设备制造有限公司 | A kind of Novel high-isolation double polarized micro strip antenna |
| WO2021203529A1 (en) * | 2020-04-08 | 2021-10-14 | 南京步微信息科技有限公司 | Low-profile wideband antenna |
| CN111600122A (en) * | 2020-05-13 | 2020-08-28 | 中天宽带技术有限公司 | Patch antenna |
| CN111600122B (en) * | 2020-05-13 | 2022-12-30 | 中天宽带技术有限公司 | Patch antenna |
| CN111641041A (en) * | 2020-05-20 | 2020-09-08 | 广州吉欧电子科技有限公司 | Integrated broadband GNSS antenna device |
| CN114824766A (en) * | 2021-01-19 | 2022-07-29 | 大唐移动通信设备有限公司 | Multi-mode navigation antenna |
| CN114530692A (en) * | 2022-02-25 | 2022-05-24 | 京东方科技集团股份有限公司 | Antenna device, antenna system and communication system |
| CN114530692B (en) * | 2022-02-25 | 2024-03-26 | 京东方科技集团股份有限公司 | Antenna device, antenna system and communication system |
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Application publication date: 20130206 |