Combined GNSS choking coil antenna and communication equipment

Abstract

The invention provides a combined GNSS choking coil antenna and communication equipment, and relates to the field of antennas. The combined GNSS choking coil antenna comprises a first multi-path suppression plate, a second multi-path suppression plate, a supporting piece, a GNSS antenna unit and a plurality of multi-path suppression units, the first multi-path suppression plate and the second multi-path suppression plate are oppositely arranged, and the supporting piece is arranged between the first multi-path suppression plate and the second multi-path suppression plate. The first multi-path suppression plate is located above the second multi-path suppression plate, the GNSS antenna unit is arranged above the first multi-path suppression plate, the plurality of multi-path suppression units are annularly arranged along the center of the first multi-path suppression plate and are vertically arranged on the outer edge of the first multi-path suppression plate, and the plurality of multi-path suppression units are electrically connected with the first multi-path suppression plate. The invention provides a combined GNSS choking coil antenna and communication equipment.

Description

Technical Field

[0001] The present invention relates to the field of antennas, and in particular to a combined GNSS choke antenna and communication equipment. Background Art

[0002] The global satellite navigation system is developing rapidly, and people are gradually pursuing high-performance positioning antennas. The existence of multipath effects and unstable antenna phase centers in the operating environment will inevitably affect the positioning accuracy of the system and are the main reasons affecting the positioning accuracy. Multipath signals are satellite signals received by the receiver antenna along with direct signals after electromagnetic waves are reflected or scattered when they encounter complex environments such as buildings and lakes during propagation. Compared with direct signals, multipath signals have a longer path, so the phase lags, and the amplitude will also attenuate or increase during the reflection or scattering process. That is, multipath signals will cause changes in the receiver's carrier-to-noise ratio and reduce the receiver's ranging accuracy.

[0003] Therefore, in order to suppress the multipath signal of the antenna, choke technology was born. A choke is a base structure composed of multiple concentric metal slots of a certain depth. The number of concentric slots on it is generally three to five, and the slot depth is usually about one-quarter of the wavelength of the antenna, so that the surface of the choke presents high impedance characteristics. It can generate a composite mode of the field to change the gain distribution of the antenna radiation field and reduce the back lobe and side lobe. Since multipath signals mostly enter the receiver from the low elevation angle and back lobe of the antenna, the choke has the ability to suppress multipath.

[0004] The choke is generally composed of three to five concentric circular grooves with a certain groove depth. As the ground plate of the antenna unit, the working principle is to change the gain distribution of the antenna by generating a composite mode, so that it has lower side lobes and back lobes, improve the symmetry of the directional pattern, and thus achieve multipath suppression. At present, the chokes used in GNSS antenna unit systems on the market are 2D and 3D concentric metal groove chokes, most of which are single-frequency structures, with a heavy overall weight and high cost, which is not conducive to carrying, transportation and use. Summary of the invention

[0005] The embodiment of the present invention discloses a combined GNSS choke ring antenna and a communication device. The combined GNSS choke ring antenna can effectively absorb most multipath signals and reduce the overall weight of the antenna, and has a simple structure and low design cost.

[0006] In the first aspect, the present invention discloses a combined GNSS choke antenna, which comprises: a first multipath suppression plate, a second multipath suppression plate, a support, a GNSS antenna unit and a plurality of multipath suppression units, wherein the first multipath suppression plate and the second multipath suppression plate are arranged opposite to each other, and the support is arranged between the first multipath suppression plate and the second multipath suppression plate, the first multipath suppression plate is located above the second multipath suppression plate, the GNSS antenna unit is arranged above the first multipath suppression plate, the plurality of multipath suppression units are arranged in a ring shape along the center of the first multipath suppression plate and are arranged vertically on the outer edge of the first multipath suppression plate, and the plurality of multipath suppression units are all electrically connected to the first multipath suppression plate. The plurality of multipath suppression units are arranged in a ring shape along the center of the first multipath suppression plate and are arranged vertically on the outer edge of the first multipath suppression plate, and the plurality of multipath suppression units are all electrically connected to the GNSS antenna unit to form a charge in the vertical direction, so as to effectively improve the antenna low elevation angle gain.

[0007] As an optional implementation, the multipath suppression unit is designed in an L shape. The L-shaped design of the multipath suppression unit can effectively extend the effective electrical length of the antenna, play a role in current suppression, block the surface current on the first multipath suppression plate from flowing backward, offset the energy of the antenna backward co-polarization and the different polarization energy of the low elevation angle part, thereby suppressing the radiation of the backward energy and improving the antenna's anti-multipath capability.

[0008] As an optional implementation manner, the L-shaped vertical arm of the multipath suppression unit is located inside and extends toward the center direction of the first multipath suppression plate.

[0009] As an optional implementation manner, the height of the multipath suppression unit is less than or equal to a quarter of the wavelength length.

[0010] As an optional implementation, the spacing between the first multipath suppression plate and the second multipath suppression plate is less than or equal to a quarter wavelength. The spacing between the first multipath suppression plate and the second multipath suppression plate is less than or equal to a quarter wavelength, which can effectively improve the multipath suppression capability of the antenna.

[0011] As an optional implementation manner, both the first multipath suppression plate and the second multipath suppression plate are circular plates, and the two are concentrically arranged.

[0012] As an optional implementation manner, the GNSS antenna unit is arranged concentrically with the first multipath suppression plate and the second multipath suppression plate.

[0013] As an optional implementation, the combined GNSS choke ring antenna further includes a Lora antenna, which is integrated in the center of the GNSS antenna unit. Optionally, a hole can be dug in the center of the antenna medium of the GNSS antenna unit to integrate the Lora antenna, which can make the overall weight lighter.

[0014] As an optional implementation, the combined GNSS choke ring antenna further includes a 4G antenna and a WiFi antenna, and the 4G antenna and the WiFi antenna are arranged on the outer peripheral upper surface of the second multipath suppression plate. The 4G antenna and the WiFi antenna are integrated on the outer periphery of the second multipath suppression plate to enhance the multipath suppression capability of the combined GNSS choke ring antenna.

[0015] As an optional implementation, the 4G antenna, WiFi antenna and Lora antenna can all adopt a monopole antenna method to achieve wide bandwidth, miniaturization, low-cost design, and stable performance.

[0016] In a second aspect, the present invention discloses a communication device, comprising any of the combined GNSS choke antennas described above.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] A combined GNSS choke antenna and communication equipment provided by an embodiment of the present invention adopts a combination mode of a first multipath suppression plate and a second multipath suppression plate, the first multipath suppression plate and the second multipath suppression plate are connected by a support, a plurality of multipath suppression units are arranged in a ring along the center of the first multipath suppression plate and are vertically arranged on the outer edge of the first multipath suppression plate, and the plurality of multipath suppression units are electrically connected to the GNSS antenna unit to form a charge in the vertical direction, so as to effectively improve the low elevation gain of the antenna. The combined GNSS choke antenna provided by the embodiment of the present invention has a strong anti-multipath interference capability. By arranging a multipath suppression unit on the first multipath suppression plate and adding a second multipath suppression plate, the low elevation gain of the antenna can be effectively improved and the axial ratio bandwidth of the antenna can be expanded, and most of the multipath signals can be absorbed. The embodiment of the present invention has the characteristics of simple structure and light weight. At the same time, the GNSS antenna unit adopts an air dielectric method, and the material weight of the plurality of multipath suppression units is much lower than that of the concentric metal slot, which can make the antenna structure simple and the phase center stable. The single-layer four-feed method is adopted, and the upper and lower resonant surfaces achieve broadband dual-frequency performance, effectively expanding the axial ratio bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of a combined GNSS choke ring antenna disclosed in an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the combined GNSS choke ring antenna from another perspective;

[0022] Figure 3 yes Figure 1 A schematic diagram of the structure of the combined GNSS choke ring antenna from another perspective;

[0023] Figure 4 yes Figure 1 Passive radiation pattern of the combined GNSS choke ring antenna at 1.227 GHz;

[0024] Figure 5 yes Figure 1 Passive radiation pattern of the combined GNSS choke ring antenna at 1.575 GHz.

[0025] Description of reference numerals:

[0026] 100-combined GNSS choke antenna; 110-first multipath suppression plate; 120-second multipath suppression plate; 130-support; 140-GNSS antenna unit; 150-multipath suppression unit; 160-Lora antenna; 170-4G antenna; 180-WiFi antenna. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0029] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0032] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0033] See also Figures 1 to 3 The embodiment of the present invention provides a combined GNSS choke ring antenna 100. The combined GNSS choke ring antenna 100 can effectively absorb most multipath signals and reduce the overall weight of the antenna, and has a simple structure and low design cost.

[0034] like Figure 1 and Figure 2As shown, the combined GNSS choke ring antenna 100 includes a first multipath suppression plate 110, a second multipath suppression plate 120, a support member 130, a GNSS antenna unit 140 and a plurality of multipath suppression units 150, the first multipath suppression plate 110 and the second multipath suppression plate 120 are arranged opposite to each other, and the support member 130 is arranged between the first multipath suppression plate 110 and the second multipath suppression plate 120, the first multipath suppression plate 110 is located above the second multipath suppression plate 120, and the GNSS antenna unit 140 is arranged above the first multipath suppression plate 110, as shown in FIG. Figure 3 As shown, the plurality of multipath suppression units 150 are arranged in a ring shape along the center of the first multipath suppression plate 110 and are vertically disposed at the outer edge of the first multipath suppression plate 110 . The plurality of multipath suppression units 150 are all electrically connected to the GNSS antenna unit 140 .

[0035] It should be pointed out that in the embodiment of the present invention, a first multipath suppression plate 110 and a second multipath suppression plate 120 are combined, the first multipath suppression plate 110 and the second multipath suppression plate 120 are connected by a support member 130, a plurality of multipath suppression units 150 are arranged in a ring along the center of the first multipath suppression plate 110 and are vertically arranged on the outer edge of the first multipath suppression plate 110, and the plurality of multipath suppression units 150 are electrically connected to the GNSS antenna unit 140 to form a charge in the vertical direction, thereby effectively improving the antenna's low elevation gain. The combined GNSS choke ring antenna 100 provided in the embodiment of the present invention has a strong ability to resist multipath interference. By providing the multipath suppression unit 150 on the first multipath suppression plate 110 and adding the second multipath suppression plate 120, the passive radiation patterns of the combined GNSS choke ring antenna 100 at 1.227 GHz and .575 GHz are respectively as follows: Figure 4 and Figure 5 As shown, the combined GNSS choke antenna 100 can effectively improve the antenna's low elevation gain and expand the antenna's axial ratio bandwidth, and can absorb most multipath signals. The embodiment of the present invention has the characteristics of simple structure and light weight. At the same time, the GNSS antenna unit 140 adopts an air dielectric method, and the material weight of the multiple multipath suppression units 150 is much lower than that of the concentric metal slots, which can make the antenna structure simple and the phase center stable. A single-layer four-feed method is adopted, and the upper and lower resonant surfaces achieve broadband dual-frequency performance, effectively expanding the axial ratio bandwidth.

[0036] Optionally, the support member 130 may be a nylon column.

[0037] As an optional implementation, the multipath suppression unit 150 is designed in an L shape. The L-shaped design of the multipath suppression unit 150 can effectively extend the effective electrical length of the antenna, play a role in current suppression, block the surface current on the first multipath suppression plate 110 from flowing backward, offset the energy of the antenna backward co-polarization and the different polarization energy of the low elevation angle part, thereby suppressing the radiation of the backward energy and improving the antenna's anti-multipath capability.

[0038] Optionally, in this embodiment, the L-shaped vertical arm of the multipath suppression unit 150 is located inside and extends toward the center of the first multipath suppression plate 110. That is, the narrow section faces the center, the L vertical arm is located inside and extends toward the center of the first multipath suppression plate 110, and the height of the multipath suppression unit 150 determines the multipath suppression capability of the antenna in the GNSS frequency band. Optionally, the height of the multipath suppression unit 150 can be set to a quarter wavelength length or less of the antenna operating frequency. Of course, it is not limited to this. In other embodiments of the present invention, the number and size of the multipath suppression units 150 can also be adaptively adjusted according to the antenna operating frequency and the allowed spatial structure, and the embodiment of the present invention does not make specific requirements and limitations on this.

[0039] Optionally, in this embodiment, the spacing between the first multipath suppression plate 110 and the second multipath suppression plate 120 is less than or equal to a quarter wavelength. The spacing between the first multipath suppression plate 110 and the second multipath suppression plate 120 is less than or equal to a quarter wavelength, which can effectively improve the multipath suppression capability of the antenna. Further, in this embodiment, the first multipath suppression plate 110 and the second multipath suppression plate 120 are both circular plates, and the outer peripheral surface is a circular surface, and the GNSS antenna unit 140 is concentrically arranged with the first multipath suppression plate 110 and the second multipath suppression plate 120. Optionally, the multipath suppression unit 150 can be an L-shaped plate structure made of copper-clad plate material, and the size and thickness of each multipath suppression unit 150 are substantially the same.

[0040] As an optional embodiment, the combined GNSS choke ring antenna 100 further includes a Lora antenna 160, which is integrated in the center of the GNSS antenna unit 140. Optionally, a hole can be dug in the center of the antenna medium of the GNSS antenna unit 140 to integrate the Lora antenna 160, which can make the overall weight lighter.

[0041] As an optional embodiment, the combined GNSS choke ring antenna 100 further includes a 4G antenna 170 and a WiFi antenna 180, which are arranged on the outer peripheral upper surface of the second multipath suppression plate 120. The 4G antenna 170 and the WiFi antenna 180 are integrated on the outer periphery of the second multipath suppression plate 120, have a simple structure, a compact size, and are far away from the first multipath suppression plate 110, thereby reducing interference to the GNSS unit, and facilitating enhancement of the multipath suppression capability of the combined GNSS choke ring antenna 100.

[0042] Optionally, the GNSS antenna unit 140 can be a single-layer quad-feed microstrip antenna, which uses an air medium to reduce the weight of a traditional antenna medium, has a low antenna profile and low cost, is connected to a feed network and a low-noise amplifier circuit, and is provided with four centrally symmetrically arranged feed ports. Optionally, the 4G antenna 170, the WiFi antenna 180, and the Lora antenna 160 can all use a monopole antenna to achieve wide bandwidth, miniaturization, low-cost design, and stable performance.

[0043] Please refer to Figures 1 to 5 Compared with the prior art, the combined GNSS choke antenna 100 provided in the embodiment of the present invention has the characteristics of strong anti-multipath interference capability. The embodiment of the present invention sets a multipath suppression unit 150 on the first multipath suppression plate 110 and sets a second multipath suppression plate 120. Through the position and distance relationship between the first multipath suppression plate 110, the second multipath suppression plate 120, that is, the multipath suppression unit 150, the antenna low elevation gain and the axial ratio bandwidth of the antenna are effectively improved, and most of the multipath signals can be absorbed. The combined GNSS choke antenna 100 provided in the embodiment of the present invention has the characteristics of simple structure and light weight. The GNSS antenna unit 140 adopts an air dielectric method, and the material weight of multiple multipath suppression units 150 is much lower than that of concentric metal slots. The antenna has a simple structure and a stable phase center. It adopts a single-layer four-feed method. The upper and lower resonant surfaces achieve broadband dual-frequency performance, effectively expand the axial ratio bandwidth, and the Lora antenna 160 is integrated in the center of the antenna medium, which is lighter. The 4G antenna 170 and the WiFi antenna 180 are integrated on the outer periphery of the second multipath suppression board 120 , have a simple structure, compact size, and are far away from the first multipath suppression board 110 , thereby reducing interference to the GNSS unit and facilitating enhancement of the multipath suppression capability of the GNSS antenna unit 140 .

[0044] An embodiment of the present invention further provides a combined GNSS choke ring antenna communication device including any one of the aforementioned embodiments.

[0045] The above is a detailed introduction to a combined GNSS choke antenna and communication equipment disclosed in an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the combined GNSS choke antenna and communication equipment of the present invention and its core idea: At the same time, for general technicians in this field, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A combined GNSS choke ring antenna, characterized in that: include: A first multipath suppression board, a second multipath suppression board, a support, a GNSS antenna unit and a plurality of multipath suppression units, wherein the first multipath suppression board and the second multipath suppression board are arranged opposite to each other, and the support is arranged between the first multipath suppression board and the second multipath suppression board, the first multipath suppression board is located above the second multipath suppression board, the GNSS antenna unit is arranged above the first multipath suppression board, the plurality of multipath suppression units are arranged in a ring shape along the center of the first multipath suppression board and are vertically arranged at the outer edge of the first multipath suppression board, and the plurality of multipath suppression units are electrically connected to the first multipath suppression board.

2. The combined GNSS choke ring antenna according to claim 1, characterized in that: The multipath suppression unit is designed to be L-shaped.

3. The combined GNSS choke ring antenna according to claim 2, characterized in that: The L-shaped vertical arm of the multipath suppression unit is located inside and extends toward the center of the first multipath suppression plate.

4. The combined GNSS choke ring antenna according to claim 2 or 3, characterized in that: The height of the multipath suppression unit is less than or equal to a quarter of the wavelength.

5. The combined GNSS choke ring antenna according to claim 1, characterized in that: The interval between the first multipath suppression plate and the second multipath suppression plate is less than or equal to a quarter wavelength length.

6. The combined GNSS choke ring antenna according to claim 1, characterized in that: The first multipath suppression plate and the second multipath suppression plate are both circular plates, and the two are concentrically arranged.

7. The combined GNSS choke ring antenna according to claim 6, characterized in that: The GNSS antenna unit is arranged concentrically with the first multipath suppression plate and the second multipath suppression plate.

8. The combined GNSS choke ring antenna according to claim 1, characterized in that: The combined GNSS choke ring antenna also includes a Lora antenna, which is integrated at the center of the GNSS antenna unit.

9. The combined GNSS choke ring antenna according to claim 8, characterized in that: The combined GNSS choke ring antenna also includes a 4G antenna and a WiFi antenna, and the 4G antenna and the WiFi antenna are arranged on the outer peripheral upper surface of the second multipath suppression plate.

10. A communication device, characterized in that: It comprises a combined GNSS choke ring antenna as described in any one of claims 1 to 9.

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