CN104659490A - Vehicle-mounted high-accuracy multi-mode Beidou navigation and location antenna - Google Patents
Vehicle-mounted high-accuracy multi-mode Beidou navigation and location antenna Download PDFInfo
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- CN104659490A CN104659490A CN201510087700.3A CN201510087700A CN104659490A CN 104659490 A CN104659490 A CN 104659490A CN 201510087700 A CN201510087700 A CN 201510087700A CN 104659490 A CN104659490 A CN 104659490A
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- radiation fin
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- beidou navigation
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Abstract
The invention discloses a vehicle-mounted high-accuracy multi-mode Beidou navigation and location antenna. The antenna comprises an antenna radiation part, a coupled feeding part and a feed network, wherein the antenna radiation part comprises a lower radiation sheet and an upper radiation sheet; the coupled feeding part comprises casings, medium filler and inner cores; the casings are connected with four output ports A,B, C and D of the feed network; the medium filler isolates each casing and each inner core to form a capacitive coupling effect, and the inner cores are not welded to the lower radiation sheet; the metal casings are connected with the output ports of the feed network. The antenna is compatible with Beidou2, GPS (global position system), GLONASS (global navigation satellite system) and Galileo satellite navigation systems, the phase center stability and the axial ratio characteristic of the antenna are improved in a four-point feed manner, the performance of a satellite navigation receiver is further improved, and the antenna is applicable to high-accuracy vehicle-mounted and airborne navigation and location.
Description
Technical field
The present invention relates to wide frequency antenna feeding technique field, especially a kind of vehicle-mounted high-precision multimode Beidou navigation positioning antenna.
Background technology
The current whole world has been runed or has been had the Galileo system in the gps system of the U.S., Muscovite CLONASS system, Europe in the satellite navigation system of building, and " No. two, the Big Dipper " satellite navigation and location system of China, be widely used in the multiple fields such as navigation, mapping, monitoring, time service, communication, especially geodesy and related discipline field thereof, comprises geodynamics, marine geodesy, astronomy, geophysical exploration, resource exploration, engineering survey and engineering project deformation monitoring etc.Along with the fast development in commercial satellite navigation application field, more and more higher to the required precision of navigator fix, as the important component part of high accuracy satellite navigation receiver, how its performance is directly connected to the size of satellite navigation receiver certainty of measurement, wherein the Phase center variation of antenna and multipath effect are the appreciable error sources in high accuracy satellite navigation measuring system, and the low elevation gain of antenna affects the sensitivity of receiver.
Prior art is difficult to the needs meeting people, for making up prior art deficiency, the present invention aims to provide a kind of vehicle-mounted high-precision multimode navigation positioning antenna being applicable to Beidou navigation satellite system, the frequency coverage Big Dipper 2 generation navigation system B1, B2 and B3 frequency range, and compatible with GPS, GLONASS and Galileo system, the present invention adopts the phase center of four-point feed technique guarantee antenna within the scope of wide angular domain and axial ratio characteristic, introducing with stylish couple feed structure has further expanded the beamwidth of antenna, improve the positioning precision of satellite navigation receiver system, positioning precision is made to reach centimetre even grade.
For realizing this technical purpose, the solution of the present invention is: a kind of vehicle-mounted high-precision multimode Beidou navigation positioning antenna, comprises aerial radiation part, couple feed part and feeding network three part; Described aerial radiation part comprises lower radiation fin and upper radiation fin; Described couple feed part comprises shell, Filled Dielectrics and inner core; Described shell and feeding network four output ports A, B, C and D are connected; Shell and inner core are isolated and are formed capacitive coupling effect by Filled Dielectrics, and inner core welds with lower radiation fin; Metal shell is connected with feeding network output port; Described feeding network part comprises 180 degree of directional couplers and two 90-degree phase shifters, the signal of output amplitude equal phase difference 90 degree.
As further technical scheme of the present invention: described couple feed part is in " dumbbell " shape, and lower radiation fin and upper radiation fin are original shape; Described upper radiation fin diameter is 60mm, and lower radiation fin diameter is 80mm, and metal floor diameter is 120mm.
As further technical scheme of the present invention: described lower radiation fin and upper radiation fin are located at low-frequency range and high band respectively.
Compared with prior art, the invention has the beneficial effects as follows: this vehicle-mounted high-precision multimode Beidou navigation positioning antenna, it utilizes novel couple feed structure while widening the beamwidth of antenna, enhance the controllability of couple feed, expand its scope of application, compatible Beidou2, GPS, GLONASS and Galileo satellite navigation system simultaneously, four-point feed mode is adopted to improve phase centre stability and the axial ratio characteristic of antenna, the performance of further raising satellite navigation receiver, is applicable to the vehicle-mounted and airborne navigator fix of high accuracy; Overall structure is simple; Practical, be easy to promote the use of.
Summary of the invention
Accompanying drawing explanation
Fig. 1 is radiation fin structural representation of the present invention;
Fig. 2 is couple feed part-structure schematic diagram of the present invention;
Fig. 3 is feed network structures schematic diagram of the present invention;
Fig. 4 is antenna return loss schematic diagram of the present invention;
Fig. 5 is far field radiation pattern of the present invention;
Fig. 6 is phase pattern of the present invention;
Fig. 7 is axial ratio schematic diagram of the present invention;
Wherein: shell 1; Filled Dielectrics 2; Inner core 3; Lower radiation fin 4; Upper radiation fin 5; Metal floor 6.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Figure of description 1 ~ 7, in the embodiment of the present invention, a kind of vehicle-mounted high-precision multimode Beidou navigation positioning antenna, comprises aerial radiation part, couple feed part and feeding network three part; Described aerial radiation part comprises lower radiation fin 4 and upper radiation fin 5; Described couple feed part comprises shell 1, Filled Dielectrics 2 and inner core 3; Described shell 1 and feeding network four output ports A, B, C and D are connected; Shell and inner core are isolated and are formed capacitive coupling effect by Filled Dielectrics 2, and inner core 3 welds with lower radiation fin 4; Metal shell 1 is connected with feeding network output port; Described feeding network part comprises 180 degree of directional couplers and two 90 degree of phase shifters, the signal of output amplitude equal phase difference 90 degree.
As further technical scheme of the present invention: described couple feed part is in " dumbbell " shape, and lower radiation fin 4 and upper radiation fin 5 are original shape; Described upper radiation fin diameter is 60mm, and lower radiation fin diameter is 80mm, and metal floor diameter is 120mm.
As further technical scheme of the present invention: described lower radiation fin 4 and upper radiation fin 5 are located at low-frequency range and high band respectively.
The present invention is when designing: antenna adopts Rogers 5880 microwave board, thickness 2.54mm, in order to ensure the symmetry designed, radiation fin is selected circular, upper radiation fin 5 and lower radiation fin 4 to be etched in respectively in microwave board and to fit tightly, and adopt foamed material to support between lower radiation fin 4 and metal floor, wherein going up radiation fin diameter in this example is 60mm, lower radiation fin diameter is 80mm, and metal floor diameter is 120mm; Couple feed part by four and " dumbbell " shape feed structure be evenly distributed on the circle centered by following radiation fin 4 form, and be connected with four output ports of feeding network, wherein inner core 3 welds with lower radiation fin 4, metal shell 5 is connected with feeding network output port, adopt polytetrafluoroethylmaterial material to fill between inner core 3 and metal shell, regulated the coupling of port by the diameter and length regulating " dumbbell " upper, middle and lower three part; Feeding network as shown in Figure 3, is made up of 1 180 degree of directional coupler and 2 90-degree phase shifters, and export four constant amplitudes, phase place is the signal of 0,90,180,270, to form right-handed circular polarization.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
The above; be only preferred embodiment of the present invention; not in order to limit the present invention, every above embodiment is done according to technical spirit of the present invention any trickle amendment, equivalently replace and improve, within the protection range that all should be included in technical solution of the present invention.
Claims (3)
1. a vehicle-mounted high-precision multimode Beidou navigation positioning antenna, comprises aerial radiation part, couple feed part and feeding network three part; It is characterized in that: described aerial radiation part comprises lower radiation fin (4) and upper radiation fin (5); Described couple feed part comprises shell (1), Filled Dielectrics (2) and inner core (3); Described shell (1) and feeding network four output ports A, B, C and D are connected; Shell and inner core are isolated and are formed capacitive coupling effect by Filled Dielectrics (2), and inner core (3) welds with lower radiation fin (4); Metal shell (1) is connected with feeding network output port; Described feeding network part comprises 180 degree of directional couplers and two 90-degree phase shifters, the signal of output amplitude equal phase difference 90 degree.
2. a kind of vehicle-mounted high-precision multimode Beidou navigation new definition antenna according to claim 1, is characterized in that: described couple feed part is in " dumbbell " shape, and lower radiation fin (4) and upper radiation fin (5) are original shape; Described upper radiation fin diameter is 60mm, and lower radiation fin diameter is 80mm, and metal floor diameter is 120mm.
3. a kind of vehicle-mounted high-precision multimode Beidou navigation new definition antenna according to claim 1, is characterized in that: described lower radiation fin (4) and upper radiation fin (5) are located at low-frequency range and high band respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510087700.3A CN104659490A (en) | 2015-02-15 | 2015-02-15 | Vehicle-mounted high-accuracy multi-mode Beidou navigation and location antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510087700.3A CN104659490A (en) | 2015-02-15 | 2015-02-15 | Vehicle-mounted high-accuracy multi-mode Beidou navigation and location antenna |
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| Publication Number | Publication Date |
|---|---|
| CN104659490A true CN104659490A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510087700.3A Pending CN104659490A (en) | 2015-02-15 | 2015-02-15 | Vehicle-mounted high-accuracy multi-mode Beidou navigation and location antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397881A (en) * | 2020-09-30 | 2021-02-23 | 北京空间飞行器总体设计部 | GNSS antenna suitable for high orbit satellite orbit determination |
-
2015
- 2015-02-15 CN CN201510087700.3A patent/CN104659490A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397881A (en) * | 2020-09-30 | 2021-02-23 | 北京空间飞行器总体设计部 | GNSS antenna suitable for high orbit satellite orbit determination |
| CN112397881B (en) * | 2020-09-30 | 2024-03-26 | 北京空间飞行器总体设计部 | GNSS antenna suitable for high orbit satellite orbit determination |
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Application publication date: 20150527 |
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| WD01 | Invention patent application deemed withdrawn after publication |