CN219959424U - High-precision global navigation satellite antenna device - Google Patents

Abstract

The utility model relates to the technical field of circularly polarized antennas, in particular to a high-precision global navigation satellite antenna device, which comprises: the antenna reflecting plate and the antenna radiating plate are arranged above the antenna plate in parallel, and isolation columns are vertically arranged between the antenna radiating plate and the antenna reflecting plate; the top of the antenna reflecting plate is a fully conductive reflecting surface, and a signal circuit is arranged at the bottom of the antenna reflecting plate; the antenna radiation plate top is equipped with the radiation face, the radiation face comprises ring microstrip line and connect the inside many plane helix of ring microstrip line, each the plane helix respectively through feed needle with signal circuit electric connection, its antenna frequency range covers 1GHz ~ 2GHz to accessible adjustment radiation face size and the distance of reflecting surface can select the application in 300MHz ~ 30GHz frequency band, still through simplifying mounting structure has reduced the antenna cost.

Description

High-precision global navigation satellite antenna device

Technical Field

The utility model relates to the technical field of circularly polarized antennas, in particular to a high-precision global navigation satellite antenna device.

Background

With the development of the Beidou satellite positioning system, the application of the global satellite positioning system is generally applied to various fields, and the four large satellite navigation systems of the Beidou navigation system in China, the GPS in the U.S., the GLONASS in Russia and the Galileo in Europe basically realize global coverage, so that the frequency bandwidth requirements on global satellite navigation signals are wider and wider, and a wideband global satellite navigation system antenna, particularly a high-precision satellite navigation positioning antenna, is required.

The requirements on the performance and the cost of the antenna in the application fields of automatic driving of agricultural machinery, automatic control of industrial machinery, high-precision measurement and mapping, land and ocean high-precision positioning and navigation and the like are higher and higher. In order to meet the new application market demands, the utility model provides a brand new low-cost, wide-band and high-gain global satellite positioning high-precision antenna which is used for receiving signals of a global satellite navigation system.

Disclosure of Invention

The utility model provides a high-precision global navigation satellite antenna device, wherein the frequency range of the antenna covers 1 GHz-2 GHz, the antenna can be selectively applied in the frequency band of 300 MHz-30 GHz by adjusting the size of a radiation surface and the distance of a reflecting surface, and the cost of the antenna is reduced by simplifying an installation structure.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a high precision global navigation satellite antenna device, comprising: the antenna reflecting plate and the antenna radiating plate are arranged above the antenna plate in parallel, and isolation columns are vertically arranged between the antenna radiating plate and the antenna reflecting plate; the top of the antenna reflecting plate is a fully conductive reflecting surface, and a signal circuit is arranged at the bottom of the antenna reflecting plate; the top of the antenna radiation plate is provided with a radiation surface, the radiation surface is composed of a circular microstrip line and a plurality of planar spiral lines connected inside the circular microstrip line, and each planar spiral line is electrically connected with the signal circuit through a feed pin.

Preferably, the reflecting surface is spaced from the radiating surface by 1 to 40 mm.

Preferably, the number of the planar spiral lines is four, and the four planar spiral lines are uniformly and orthogonally distributed.

Preferably, the diameter of the initial end of each planar spiral line is 1-20 mm, the line width is 0.2-5 mm, and the number of winding turns is 0.1-3 turns; the antenna reflecting plate is provided with through holes corresponding to the starting ends of the plane spiral lines, and the feed pins longitudinally penetrate through the through holes and are connected between the signal circuit and the starting ends of the plane spiral lines.

Preferably, the antenna reflecting plate is of a double-sided PCB structure, and the antenna reflecting plate is of a single-sided PCB structure.

Preferably, the signal circuit comprises a feed network, a filter, a low noise amplifier, a duplex combiner.

Preferably, the spiral direction of each planar spiral is uniform.

The utility model has the beneficial effects that:

(1) The planar broadband GNSS high-precision antenna provided by the utility model covers GPS\BDS\GLONASS\Galileo global satellite navigation frequency and L-Band interstellar differential frequency, the frequency range of the antenna covers 1 GHz-2 GHz, and the antenna can be selectively applied in a frequency Band of 300 MHz-30 GHz by adjusting the size of a radiation surface and the distance of a reflection surface.

(2) The technical scheme of the utility model ensures high performance at all global satellite navigation frequencies, including high gain, high precision, anti-interference and the like, the maximum gain of the antenna is not lower than 5dBi, the phase center error is better than 2mm, and the polarization axis ratio is smaller than 3dB.

(3) The technical scheme of the utility model simplifies the installation structure, thereby reducing the cost of the antenna, and the four feed pins replace transmission lines or TONG ZHOU cables, and the four conductive isolation columns have the functions of connecting a radiation surface and a reflecting surface, and also have the functions of choking and improving low elevation gain.

In summary, the high-precision global navigation satellite antenna device provided by the utility model is used for an antenna of a satellite communication system, and is not limited to be applied to the fields of survey and mapping, agricultural machinery control, automatic driving, driving test driving school and the like, and high-precision positioning, navigation and control systems of various land vehicles and ocean aircrafts.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

fig. 2 is a top view of an antenna radiating plate of the present utility model;

FIG. 3 is a schematic side view of the present utility model;

FIG. 4 is a primary satellite navigation frequency pattern;

FIG. 5 is a GPS L1 gain pattern;

FIG. 6 is a GPS L2 gain pattern;

FIG. 7 is a GPS L5 gain pattern;

FIG. 8 is a BDS B1 gain pattern;

FIG. 9 is a BDS B2 gain pattern;

FIG. 10 is a BDS B3 gain pattern;

FIG. 11 is a Galileo E6 gain pattern;

FIG. 12 is a BDS B1 AR;

FIG. 13 is a BDS B2 AR;

FIG. 14 is a BDS B3 AR;

FIG. 15 is a GPS L1 AR;

FIG. 16 is a GPS L2 AR;

FIG. 17 is GPS L5 AR;

FIG. 18 is Galileo E6 AR;

fig. 19 is an antenna port standing wave ratio curve.

Detailed Description

The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, 2 and 3, a high-precision global navigation satellite antenna device includes: an antenna reflecting plate 1 and an antenna radiating plate 2 arranged above the antenna reflecting plate in parallel, wherein an isolation column 3 is vertically arranged between the antenna radiating plate 2 and the antenna reflecting plate 1; the top of the antenna reflecting plate 1 is a fully conductive reflecting surface 4, and the bottom of the antenna reflecting plate 1 is provided with a signal circuit 5; the top of the antenna radiation plate 2 is provided with a radiation surface, the radiation surface is composed of a circular microstrip line 6 and a plurality of planar spiral lines 7 connected inside the circular microstrip line 6, and each planar spiral line 7 is electrically connected with the signal circuit 5 through a feed needle 8.

Wherein the distance between the reflecting surface 4 and the radiating surface is 1 to 40 mm. The number of the plane spiral lines 7 is four, and the four plane spiral lines 7 are uniformly and orthogonally distributed. The diameter of the initial end 9 of each plane spiral line 7 is 1-20 mm, the line width is 0.2-5 mm, and the winding turns are 0.1-3 turns; the antenna reflecting plate 1 is provided with through holes corresponding to the starting ends 9 of the planar spiral lines 7, and the feed pins 8 longitudinally penetrate through the through holes and are connected between the signal circuit 5 and the starting ends 9 of the planar spiral lines 7. At the same time, the spiral direction of each planar spiral 7 is identical.

The high-precision global navigation satellite antenna device is characterized in that four feed pins 8 are used for replacing a transmission line, the four feed pins 8 are distributed in adjacent orthogonality, the four feed pins 8 lead out that four received antenna signals are also in adjacent orthogonality, the four antenna signals are respectively 0 degree, 90 degrees, 180 degrees and 270 degrees, and the four signals can be used for synthesizing circularly polarized signals through a phase-shifting bridge or a delay transmission line and also can be used for synthesizing linearly polarized signals.

In addition, the antenna reflecting plate 1 has a double-sided PCB structure, and the antenna radiating plate 2 has a single-sided PCB structure. Preferably, the signal circuit 5 comprises a feed network, a filter, a low noise amplifier, a duplex combiner. Therefore, the technical scheme of the utility model simplifies the installation structure, thereby reducing the cost of the antenna, the four feed pins 8 replace transmission lines or coaxial cables, the four conductive isolation columns 3 have the function of connecting the radiation surface and the reflection surface 4, and the utility model also has the functions of choking and improving the low elevation gain. In addition, the PCB medium is a low-loss medium material, and can be replaced by air, a low-loss plastic material, ceramic and the like. The shape of the dielectric material is related to the reflector plate and the mounting mode, and the height of the dielectric material is smaller than or equal to the distance between the radiation surface and the reflection surface 4.

According to the embodiments shown in fig. 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19, the high-precision global navigation satellite antenna device covers gps\bds\glonass\galileo global satellite navigation frequencies and L-Band interstar differential frequencies, the antenna frequency range covers 1GHz to 2GHz, and the adjustment of the size of the radiation surface and the distance of the reflection surface 4 can be selectively applied in the 300MHz to 30GHz frequency Band. The high performance of the antenna is guaranteed at all global satellite navigation frequencies, including high gain, high precision, interference resistance and the like, the maximum gain of the antenna is not lower than 5dBi, the phase center error is better than 2mm, and the polarization axis ratio is smaller than 3dB.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (7)

1. A high precision global navigation satellite antenna device, comprising:

the antenna reflecting plate and the antenna radiating plate are arranged above the antenna plate in parallel, and isolation columns are vertically arranged between the antenna radiating plate and the antenna reflecting plate;

the top of the antenna reflecting plate is a fully conductive reflecting surface, and a signal circuit is arranged at the bottom of the antenna reflecting plate;

the top of the antenna radiation plate is provided with a radiation surface, the radiation surface is composed of a circular microstrip line and a plurality of planar spiral lines connected inside the circular microstrip line, and each planar spiral line is electrically connected with the signal circuit through a feed pin.

2. A high precision global navigation satellite antenna device according to claim 1, wherein: the reflecting surface is spaced from the radiating surface by 1 to 40 millimeters.

3. A high precision global navigation satellite antenna device according to claim 2, wherein: the number of the plane spiral lines is four, and the four plane spiral lines are uniformly and orthogonally distributed.

4. A high precision global navigation satellite antenna device according to claim 3, wherein: the diameter of the initial end of each plane spiral line is 1-20 mm, the line width is 0.2-5 mm, and the number of winding turns is 0.1-3 turns; the antenna reflecting plate is provided with through holes corresponding to the starting ends of the plane spiral lines, and the feed pins longitudinally penetrate through the through holes and are connected between the signal circuit and the starting ends of the plane spiral lines.

5. A high precision global navigation satellite antenna device according to claim 3, wherein: the antenna reflecting plate is of a double-sided PCB structure, and the antenna reflecting plate is of a conductive plane structure or a single-sided PCB structure.

6. A high precision global navigation satellite antenna device according to claim 1, wherein: the signal circuit comprises a feed network, a filter, a low noise amplifier and a double-circuit multiplexer.

7. A high precision global navigation satellite antenna device according to claim 3, wherein: the spiral directions of the plane spiral lines are consistent.