CN216793977U

CN216793977U - Low-cost eight-feed-point full-band high-precision positioning antenna

Info

Publication number: CN216793977U
Application number: CN202220080983.4U
Authority: CN
Inventors: 汪漪; 刘奎伶; 王金燕; 孙中亮
Original assignee: Shenzhen Huada Beidou Technology Co ltd
Current assignee: Shenzhen Huada Beidou Technology Co ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-06-21
Anticipated expiration: 2032-01-12

Abstract

The embodiment of the utility model discloses a low-cost eight-feed-point full-band high-precision positioning antenna which comprises an antenna bottom plate, a combiner circuit, an upper FR4 plate, a lower FR4 plate and a feed probe, wherein the lower FR4 plate is arranged between the upper FR4 plate and the antenna bottom plate, the combiner circuit is integrated on the antenna bottom plate, and the combiner circuit comprises a GNSS high-frequency band four-point feed combiner circuit and a GNSS low-frequency band four-point feed combiner circuit; the number of the feed probes is 8; the FR4 board on the upper layer is connected with a GNSS high-frequency section four-point feed combiner circuit; the lower FR4 board is connected with the GNSS low-frequency section four-point feed combiner circuit. The utility model adopts the design of common FR4 board, can also meet the bandwidth and gain requirements of full frequency bands, does not need to adopt low-dielectric-coefficient high-frequency board, is manufactured by using FR4 board, and has low cost and convenient material supply; FR4 panel's dielectric coefficient is big, and the antenna size is little, and the diameter can be less than 80mm, and the range of application is wider.

Description

Low-cost eight-feed-point full-band high-precision positioning antenna

Technical Field

The utility model relates to the technical field of satellite navigation, in particular to a low-cost eight-feed-point full-band high-precision positioning 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.

In addition, the full-band high-precision antenna on the market at present adopts an eight-feed-point design scheme, and adopts a laminated high-frequency plate design with a low dielectric coefficient (the general dielectric coefficient is 2.65, and the loss angle is 0.0017): the lower high-frequency plate adopts a four-point feed design, the thickness is 10mm, and the working frequency band is as follows: 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 solution are: 1. in order to meet the bandwidth requirement, a large-thickness high-frequency plate needs to be adopted to manufacture the antenna, and the cost is high. 2. The high-frequency plate with the dielectric coefficient of 2.65 is generally used, the size is larger, the diameter of the antenna bottom plate is larger than 110mm generally, and the application range is limited.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the embodiments of the present invention is to provide a low-cost eight-feed-point full-band high-precision positioning antenna, so that the antenna can be applied to a high-precision positioning scene, and simultaneously, the cost is reduced.

In order to solve the technical problem, an embodiment of the present invention provides a low-cost eight-feed-point full-band high-precision positioning antenna, including an antenna bottom plate and a combining circuit, further including an upper FR4 plate, a lower FR4 plate, and a feed probe, where the lower FR4 plate is disposed between the upper FR4 plate and the antenna bottom plate, the combining circuit is integrated on the antenna bottom plate, and the combining circuit includes a GNSS high-band and GNSS low-band four-point feed combining circuit; the number of the feed probes is 8; 4 symmetrical feed probes are welded on the upper surface metal layer of the FR4 board of the upper layer, the 4 feed probes penetrate through the FR4 board of the lower layer and the antenna baseplate, and a GNSS high-frequency-band four-point feed combiner circuit is welded on the back of the antenna baseplate; the upper surface metal layer of the lower FR4 board is welded with another 4 symmetrical feed probes, the other 4 feed probes penetrate through the antenna bottom plate, and the back of the bottom plate is welded with a GNSS low-frequency-band four-point feed combiner circuit.

Furthermore, the four-point feed combining circuit of the GNSS high-frequency band and the GNSS low-frequency band adopts four-point feed, the difference between the feed points is 90 degrees, 3 90-degree patch bridge elements are used, and the right-hand circular polarization function is realized.

Further, the antenna base plate is a circular FR4 circuit board.

Further, the FR4 board material of the upper layer is a round FR4 board material, the diameter of which is 60mm, and the thickness of which is 6 mm.

Further, the FR4 plate material of the lower layer is a round FR4 plate material, the diameter of the round FR4 plate material is 76mm, and the thickness of the round FR4 plate material is 10 mm.

The utility model has the beneficial effects that: the utility model adopts the design of common FR4 board, can also meet the bandwidth and gain requirements of full frequency band, does not need to adopt low dielectric coefficient high frequency board, is manufactured by FR4 board, has low cost and convenient incoming material; the FR4 board has large dielectric coefficient, small antenna size, diameter smaller than 80mm, and wider application range.

Drawings

Fig. 1 is a three-dimensional structure diagram of a low-cost eight-feed-point full-band high-precision positioning antenna according to an embodiment of the present invention.

Fig. 2 is a perspective view of a low-cost eight-feed-point full-band high-precision positioning antenna according to an embodiment of the utility model.

FIG. 3 is a side perspective view of a low cost eight feed point full band high accuracy positioning antenna of an embodiment of the present invention.

Description of the reference numerals

The antenna comprises an upper FR4 board 1, a lower FR4 board 2, an antenna base plate 3 and a feed probe 4.

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 back … …) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the movement of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is 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 of the feature.

Referring to fig. 1 to 3, the low-cost eight-feed-point full-band high-precision positioning antenna according to the embodiment of the present invention includes an antenna substrate, a combining circuit, an upper FR4 board, a lower FR4 board, and a feed probe.

The low-cost eight-feed-point full-band high-precision positioning antenna disclosed by the embodiment of the utility model adopts a laminated common FR4 plate structure (the dielectric coefficient is 4.4, and the loss angle is 0.02), and the lower FR4 plate is arranged between the upper FR4 plate and the antenna bottom plate.

Compared with the full-band navigation antenna in the current market, the low-cost eight-feed-point full-band high-precision positioning antenna provided by the embodiment of the utility model is realized by adopting the common FR4 plate, and because the working frequency band of the GNSS antenna is below 2GHz, the gain loss caused by the poor loss angle of the FR4 plate is not large, according to the test, the design of the common FR4 plate can meet the bandwidth and gain requirements of the full frequency band, and a low-dielectric-coefficient high-frequency plate is not required.

The combining circuit is integrated on the antenna bottom plate and comprises a GNSS high-frequency band and a GNSS low-frequency band four-point feed combining circuit. The antenna bottom plate simultaneously supports the high-frequency and low-frequency four-point feeding combination of the GNSS frequency band and also supports the pilot frequency combination of the high frequency and the low frequency of the GNSS frequency band.

The number of the feed probes is 8. 4 symmetrical feed probes are welded on the upper surface metal layer of the FR4 board of the upper layer, the 4 feed probes penetrate through the FR4 board of the lower layer and the antenna baseplate, and a GNSS high-frequency-band four-point feed combining circuit is welded on the back of the antenna baseplate; the upper surface metal layer of the lower FR4 board is welded with another 4 symmetrical feed probes, the other 4 feed probes penetrate through the bottom plate of the antenna, and the back of the bottom plate is welded with a GNSS low-frequency-band four-point feed combiner circuit.

As an implementation manner, the four-point feed combining circuit of the GNSS high-frequency band and the GNSS low-frequency band both adopts four-point feed, the difference between the feed points is 90 °, and 3 90-degree patch bridge components are used, so that the right-hand circular polarization function is realized.

In one embodiment, the antenna chassis is a circular FR4 circuit board.

In one embodiment, the FR4 board material in the upper layer is a circular FR4 board material with a diameter of 60mm and a thickness of 6 mm.

In one embodiment, the FR4 lower plate is a circular FR4 plate with a diameter of 76mm and a thickness of 10 mm.

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

1. A low-cost eight-feed-point full-band high-precision positioning antenna comprises an antenna bottom plate and a combining circuit, and is characterized by further comprising an upper FR4 plate, a lower FR4 plate and a feed probe, wherein the lower FR4 plate is arranged between the upper FR4 plate and the antenna bottom plate, the combining circuit is integrated on the antenna bottom plate, and the combining circuit comprises a GNSS high-frequency band and a GNSS low-frequency band four-point feed combining circuit; the number of the feed probes is 8; 4 symmetrical feed probes are welded on the metal layer on the upper surface of the FR4 board of the upper layer, the 4 feed probes penetrate through the FR4 board of the lower layer and the antenna bottom plate, and a GNSS high-frequency section four-point feed combiner circuit is welded on the back of the antenna bottom plate; the upper surface metal layer of the lower FR4 board is welded with another 4 symmetrical feed probes, the other 4 feed probes penetrate through the bottom plate of the antenna, and the back of the bottom plate is welded with a GNSS low-frequency-band four-point feed combiner circuit.

2. The low-cost eight-feed-point full-band high-precision positioning antenna as claimed in claim 1, wherein four-point feed combining circuits of the GNSS high-frequency band and the GNSS low-frequency band adopt four-point feed, the difference between the feed points is 90 degrees, and 3 90-degree patch bridge components are used to realize right-hand circular polarization function.

3. The low-cost eight-feed-point full-band high-precision positioning antenna as claimed in claim 1, wherein the antenna bottom board is a circular FR4 circuit board.

4. The low-cost eight-feed-point full-band high-precision positioning antenna as claimed in claim 1, wherein the FR4 board as the upper layer is a circular FR4 board with a diameter of 60mm and a thickness of 6 mm.

5. The low-cost eight-feed-point full-band high-precision positioning antenna as claimed in claim 1, wherein the lower FR4 plate is a circular FR4 plate with a diameter of 76mm and a thickness of 10 mm.