CN216671915U - Low-cost four-point coupling feed full-frequency-band high-precision navigation antenna - Google Patents
Low-cost four-point coupling feed full-frequency-band high-precision navigation antenna Download PDFInfo
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- CN216671915U CN216671915U CN202220080981.5U CN202220080981U CN216671915U CN 216671915 U CN216671915 U CN 216671915U CN 202220080981 U CN202220080981 U CN 202220080981U CN 216671915 U CN216671915 U CN 216671915U
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Abstract
The embodiment of the utility model discloses a low-cost four-point coupling feed full-frequency-band high-precision navigation antenna, which comprises an antenna bottom plate, a combining circuit, a radiation sheet, a coupling feed sheet and a support column, wherein the combining circuit adopts four-point feed; 4 coupling feed sheets penetrate through the antenna bottom plate and are welded for feeding, and the coupling feed sheets are correspondingly connected with the combiner circuit respectively and are inverted L-shaped; the radiation sheet is positioned above the antenna bottom plate and is spaced from the antenna bottom plate by a preset distance; the support column has 4, support column one end is fixed in on the antenna bottom plate, and the other end is connected fixedly with the radiation piece. The coupling feed of the utility model takes air as a medium, thereby meeting the bandwidth requirement of full frequency band, needing no large-thickness high-frequency plate, having low cost, needing no separate feed of high frequency band and low frequency band, and having simple feed network; the utility model has the advantages of low elevation axial ratio and good phase precision, meets the requirement of positioning dotting precision, and is suitable for occasions requiring high antenna phase precision such as CORS stations.
Description
Technical Field
The utility model relates to the technical field of positioning navigation, in particular to a low-cost four-point coupling feed full-frequency-band high-precision navigation antenna.
Background
Global satellite navigation system refers to space based radio navigation positioning system that provides users with all weather 3-dimensional coordinates and velocity and time information at any location on the earth's surface or near-earth space, the principle being that the satellite-to-user distance measurement is based on the difference between the time of transmission of the satellite signals and the time of arrival at the receiver, called pseudorange, which requires the reception of at least signals from 4 satellites in order to calculate the three-dimensional position of the user and the receiver clock bias. With the development of global integration, satellite navigation systems have applications in various fields such as aviation, automobile navigation, communication, surveying and mapping, entertainment and the like.
Currently, there are four major satellite positioning systems around the world: the Global Positioning System (GPS) in the united states, the global navigation satellite system (GLONASS) in russia, the galileo satellite positioning system in the european space agency, and the beidou navigation satellite positioning system in china.
Because the working frequency bands of the navigation systems are different greatly, and a plurality of navigation systems are needed to be used under many conditions, a navigation antenna (a circularly polarized antenna with the working frequency band of 1.175 GHz-1.607 GHz) supporting all civil navigation systems needs to be invented, and meanwhile, the antenna is required to have high phase precision and low cost, and can be used in occasions requiring high-precision positioning, such as a CORS station and the like.
The current market of full-band navigation antennas usually adopts the following two design schemes:
the first design scheme adopts the design of range upon range of high frequency panel, and lower floor's high frequency board adopts the design of four point feed, and thickness 10mm, the working frequency range is: 1.175GHz-1.279 GHz. The upper high-frequency board also adopts the design of four-point feed, and thickness 6mm, the working frequency channel is: 1.559GHz-1.607 GHz. The disadvantages of this design are: 1. in order to meet the bandwidth requirement, a high-frequency plate with large thickness is required to be used for manufacturing the antenna, and the cost is high. 2. The high frequency band and the low frequency band are separately fed, and the feed network is complex.
The second design scheme adopts a broadband cross dipole antenna to realize design and adopts two-point feed. The antenna has wide bandwidth and working frequency range of 1.175 GHz-1.607GHZ, but has poor low elevation axial ratio and phase precision, so that the positioning dotting precision is insufficient, and the antenna can not be used in occasions with high requirements on antenna phase precision, such as CORS stations.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the embodiments of the present invention is to provide a low-cost four-point coupling feeding full-band high-precision navigation antenna, so as to improve the positioning precision and reduce the cost.
In order to solve the technical problem, an embodiment of the present invention provides a low-cost four-point coupling feeding full-band high-precision navigation antenna, including an antenna bottom plate and a combining circuit integrated on the antenna bottom plate, further including a radiation sheet, a coupling feeding sheet, and a support pillar, wherein the combining circuit adopts four-point feeding; 4 coupling feed sheets penetrate through the antenna bottom plate and are welded for feeding, and the coupling feed sheets are correspondingly connected with the combiner circuit respectively and are inverted L-shaped; the radiation sheet is positioned above the antenna bottom plate and is spaced from the antenna bottom plate by a preset distance; the support column has 4, support column one end is fixed in on the antenna bottom plate, and the other end passes coupling feed piece respectively and is connected fixedly with the radiation piece.
Furthermore, the difference between the feed points of the combiner circuit is 90 degrees, and 3 90-degree broadband patch bridge components are used to realize the right-hand circular polarization function.
Furthermore, the antenna also comprises a copper stud, the copper stud is arranged between the radiation sheet and the antenna bottom plate, and the two ends of the copper stud are respectively fixed at the centers of the radiation sheet and the antenna bottom plate.
Further, the support column is made of a nylon material.
The utility model has the beneficial effects that: the coupling feed of the utility model takes air as a medium, thereby meeting the bandwidth requirement of full frequency band, needing no large-thickness high-frequency plate, having low cost, needing no separate feed of high frequency band and low frequency band, and having simple feed network; the utility model has the advantages of low elevation axial ratio and good phase precision, meets the requirement of positioning dotting precision, and is suitable for occasions requiring high antenna phase precision such as CORS stations.
Drawings
Fig. 1 is a three-dimensional structure diagram of a low-cost four-point coupling feeding full-band high-precision navigation antenna according to an embodiment of the present invention.
Fig. 2 is a side view of a low-cost four-point coupled feed full-band high-precision navigation antenna according to an embodiment of the utility model.
Fig. 3 is a top view of a low-cost four-point coupled feeding full-band high-precision navigation antenna according to an embodiment of the present invention.
Description of the reference numerals
The antenna comprises an antenna bottom plate 1, a radiation piece 2, a coupling feed piece 3, a support column 4 and a copper stud 5.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, and the present invention is further described in detail with reference to the drawings and specific embodiments.
If directional indications (such as up, down, left, right, front, and rear … …) are provided in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the movement, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
Referring to fig. 1 to 3, a low-cost four-point coupling feed full-band high-precision navigation antenna according to an embodiment of the present invention includes an antenna bottom plate, a combiner circuit, a radiation sheet, a coupling feed sheet, and a support pillar.
The combiner circuit is integrated on the antenna base plate. The antenna backplane is preferably a circular FR4 circuit board. The combiner circuit adopts four-point feed, the difference between all feed points is 90 degrees, and 3 90-degree broadband patch bridge components are used to realize the right-hand circular polarization function.
The four coupling feed points have 90-degree difference, and the combiner circuit uses 3 90-degree broadband patch bridge components to realize the right-hand circular polarization function.
The number of the coupling feed pieces is 4, the coupling feed pieces penetrate through the antenna bottom plate to be welded and fed, and are correspondingly connected with the combiner circuit respectively, and the coupling feed pieces are inverted L-shaped. The coupling feed piece adopts L type feed piece, and the width is 4mm, and feed piece end width becomes 1mm, passes antenna bottom plate welding feed. In specific implementation, the L-shaped feeding plate adopted by the utility model can be replaced by a coupling feeding plate with other shapes.
The radiation sheet is positioned above the antenna bottom plate and is spaced from the antenna bottom plate by a preset distance. The radiating sheet is preferably a metal plate with the diameter of 60mm and the thickness of 1mm, and the distance between the lower surface of the radiating sheet and the upper surface of the antenna base plate is preferably 25 mm. The support column has 4, support column one end is fixed in on the antenna bottom plate, and the other end passes coupling feed piece respectively and is connected fixedly with the radiation piece.
As an implementation mode, the low-cost four-point coupling feed full-frequency band high-precision navigation antenna further comprises a copper stud, the copper stud is arranged between the radiation piece and the antenna bottom plate, and the two ends of the copper stud are respectively fixed to the centers of the radiation piece and the antenna bottom plate. In order to better fix the position between the radiation piece and the antenna base plate, the centers of the radiation piece and the antenna base plate are fixedly grounded by using a single-pass hexagonal copper stud of M3 × 25+ 6.
In one embodiment, the support post is made of nylon material. The support column is used for fixed coupling feed piece, beats the hole of diameter 2mm on the feed piece, uses single-pass hexagonal nylon support column, and the model is M2 22+6, and above-mentioned support column screw thread end passes feed piece back and adds the M2 nylon gasket of two 1mm thickness, lets support column screw thread end pass the radiation piece again, then fixes with the nylon nut, and support column through-hole end uses the nylon screw to fix on the antenna bottom plate.
The four-point coupling feed metal plate antenna is adopted, coupling feed is carried out through the L-shaped feed sheet, the change is small in the range of 50 ohms in the full frequency band range of the GNSS of 1.175 GHz-1.607GHz, and broadband matching is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A low-cost four-point coupling feed full-frequency-band high-precision navigation antenna comprises an antenna bottom plate and a combiner circuit integrated on the antenna bottom plate, and is characterized by further comprising a radiation sheet, a coupling feed sheet and a support column, wherein the combiner circuit adopts four-point feed; 4 coupling feed sheets penetrate through the antenna bottom plate and are welded for feeding, and the coupling feed sheets are correspondingly connected with the combiner circuit respectively and are inverted L-shaped; the radiation sheet is positioned above the antenna bottom plate and is spaced from the antenna bottom plate by a preset distance; the support column has 4, support column one end is fixed in on the antenna bottom plate, and the other end passes coupling feed piece respectively and is connected fixedly with the radiation piece.
2. The low-cost four-point coupling feed full-band high-precision navigation antenna as claimed in claim 1, wherein the difference between the feed points of the combining circuit is 90 °, and 3 90 ° broadband patch bridge components are used to realize the right-hand circular polarization function.
3. The low-cost four-point coupling feed full-band high-precision navigation antenna according to claim 1, further comprising a copper stud, wherein the copper stud is arranged between the radiation piece and the antenna base plate, and the two ends of the copper stud are respectively fixed at the centers of the radiation piece and the antenna base plate.
4. The low-cost four-point coupled feed full-band high-precision navigation antenna as claimed in claim 1, wherein the supporting posts are made of nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220080981.5U CN216671915U (en) | 2022-01-12 | 2022-01-12 | Low-cost four-point coupling feed full-frequency-band high-precision navigation antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220080981.5U CN216671915U (en) | 2022-01-12 | 2022-01-12 | Low-cost four-point coupling feed full-frequency-band high-precision navigation antenna |
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| CN216671915U true CN216671915U (en) | 2022-06-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114421136A (en) * | 2022-01-12 | 2022-04-29 | 深圳华大北斗科技股份有限公司 | Low-cost four-point coupling feed full-frequency-band high-precision navigation antenna |
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2022
- 2022-01-12 CN CN202220080981.5U patent/CN216671915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114421136A (en) * | 2022-01-12 | 2022-04-29 | 深圳华大北斗科技股份有限公司 | Low-cost four-point coupling feed full-frequency-band high-precision navigation antenna |
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