High-precision satellite signal antenna

Abstract

The utility model discloses a high-precision satellite signal antenna, relates to the field of antennas, and solves the problem that an existing high-precision satellite signal antenna cannot meet the requirement for receiving SBAS signals. Comprising an L2 wave band patch antenna, an L1 wave band patch antenna and a PCB. The L2 wave band patch antenna is located at the bottom layer of the antenna and is arranged at the top layer of the PCB, and resonance is in a GNSS L2 wave band; the L1 wave band patch antenna is installed in the top layer radiation surface of the L2 wave band patch antenna in an overlapped mode, resonance is in the GNSS L1 wave band, and L-band frequency is included. The vertical line direction of the top layer radiation surface of the L1 wave band patch antenna is connected with a first polarization decomposition network circuit in the bottom layer of the PCB through a first feed pin, and GNSS L1 wave band signals are decomposed into right-hand and left-hand circularly polarized signals through the first polarization decomposition network circuit. The vertical line direction of the top layer radiation surface of the L2 wave band patch antenna is connected with a second polarization decomposition network circuit in the bottom layer of the PCB through a second feed pin, and GNSS L2 wave band signals are decomposed into right-hand and left-hand circularly polarized signals through the second polarization decomposition network circuit.

Description

Technical Field

[0001] The utility model relates to the field of antennas, in particular to a high-precision satellite signal antenna. Background Art

[0002] Global Navigation Satellite System (GNSS) signals are the foundation of high-precision positioning. Their basic principle is to determine the receiver's position by measuring the distance from the satellite to the receiver and leveraging the position information of multiple satellites. However, positioning accuracy based solely on GNSS signals is affected by factors such as satellite orbit errors and ionospheric and tropospheric delays, resulting in positioning errors. Satellite-Based Augmentation System (SBAS) signals can effectively correct these errors, thereby improving positioning accuracy.

[0003] To receive both GNSS and SBAS signals, a high-precision satellite signal antenna requires an integrated design. One design solution currently available is to widen the L1 band bandwidth of the GNSS antenna, enabling it to receive both right-hand circularly polarized GNSS and right-hand circularly polarized SBAS signals in the L1 band.

[0004] However, currently, global SBAS signals can be not only right-hand circularly polarized signals but also left-hand circularly polarized signals, and their frequencies can be in the L1 band or the L2 band. The above-mentioned integrated design scheme for high-precision satellite signal antennas cannot meet the needs of receiving global SBAS signals. Utility Model Content

[0005] The embodiment of the present utility model provides a high-precision satellite signal receiving antenna to solve the problem that the high-precision satellite signal antenna provided by the prior art cannot meet the need for receiving global SBAS signals.

[0006] In order to solve the above problems, the embodiment of the present utility model discloses a high-precision satellite signal antenna, comprising: an L2 band patch antenna, an L1 band patch antenna and a printed circuit board PCB; wherein,

[0007] The L2 band patch antenna is located at the bottom layer of the antenna, is arranged on the top layer of the PCB, and resonates in the GNSS L2 band of the global navigation satellite system;

[0008] The L1 band patch antenna is superimposed and mounted on the top radiation surface of the L2 band patch antenna, resonating in the GNSS L1 band, and the frequency range includes the L-band frequency;

[0009] A first feed pin is used to connect a vertical line of the top radiation surface of the L1 band patch antenna to a first polarization decomposition network circuit in the bottom layer of the PCB. A GNSS L1 band signal is input into the first polarization decomposition network circuit through the first feed pin, and the first polarization decomposition network circuit decomposes the GNSS L1 band signal into a right-hand circularly polarized signal and a left-hand circularly polarized signal.

[0010] The vertical direction of the top radiating surface of the L2 band patch antenna is connected to the second polarization decomposition network circuit in the bottom layer of the PCB using a second feed needle. The GNSS L2 band signal is input into the second polarization decomposition network circuit through the second feed needle, and the second polarization decomposition network circuit decomposes the GNSS L2 band into right-hand circularly polarized signals and left-hand circularly polarized signals.

[0011] Furthermore, there are four first feed needles and four second feed needles, the four first feed needles are orthogonally distributed along the center of the top radiating surface of the L1 band patch antenna, and the four second feed needles are orthogonally distributed along the center of the top radiating surface of the L2 band patch antenna.

[0012] Furthermore, the first feed needle and the second feed needle may be in any of the following forms:

[0013] Cylindrical metal conductors, rivets and screws.

[0014] Furthermore, the first polarization decomposition network circuit is composed of a 90° bridge, a 90° delay line and a 50 ohm load circuit; or,

[0015] The first polarization decomposition network circuit is composed of a balun and a 90° bridge.

[0016] Furthermore, the second polarization decomposition network circuit is composed of a 90° bridge, a 90° delay line and a 50 ohm load circuit. Or,

[0017] The second polarization decomposition network circuit is composed of a balun and a 90° bridge.

[0018] Furthermore, the output end of the first polarization decomposition network circuit and the output end of the second polarization decomposition network circuit are connected to the signal combination circuit in the bottom layer of the PCB, and the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L1 band, and the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L2 band are combined through the combination circuit.

[0019] Furthermore, the signal combination circuit is composed of a filter, a low-noise amplifier, a combiner and a broadband amplifier.

[0020] Furthermore, the edge of the top radiating surface of the L2 band patch antenna combines the radiator of the 5G antenna and / or the radiator of the short-range wireless communication antenna, wherein the short-range wireless communication antenna includes: a Bluetooth BT linear polarization antenna and a Wi-Fi linear polarization antenna.

[0021] Furthermore, the radiator of the 5G antenna and / or the radiator of the short-range wireless communication antenna are symmetrically distributed on the edge of the top radiation surface of the L2 band patch antenna.

[0022] Furthermore, the vertical direction of the radiator of the 5G antenna is connected to the connector in the bottom layer of the PCB using a third feed pin; and / or,

[0023] The vertical direction of the radiator of the short-range wireless communication antenna is connected to the connector using a fourth feed pin.

[0024] Compared with the prior art, the technical solution provided by the embodiment of the present invention includes an L2 band patch antenna and an L1 band patch antenna, so that the technical solution provided by the embodiment of the present invention can receive global SBAS signals and GNSS signals in the L1 band and L2 band, solving the problem that the prior art can only receive GNSS signals and right-handed SBAS signals in the L1 band; a first polarization decomposition network circuit and a second polarization decomposition network circuit are provided, so that the technical solution provided by the embodiment of the present invention can obtain right-handed circularly polarized signals and left-handed circularly polarized signals in the GNSS L1 band, as well as GNSS The right-hand circularly polarized signal and the left-hand circularly polarized signal of the L2 band, that is, it can receive and obtain the right-hand circularly polarized signal of the GNSS in the L1 band, the right-hand circularly polarized signal of the SBAS in the L1 band, the left-hand circularly polarized signal of the SBAS in the L1 band, and the right-hand circularly polarized signal of the SBAS in the L2 band, the left-hand circularly polarized signal of the SBAS in the L2 band, etc., which solves the problem that the existing technology can only receive the right-hand circularly polarized GNSS signal of the L1 band and the global SBAS signal. Through the first polarization decomposition network circuit and the second polarization decomposition network circuit, the problem that the ±90° phase shift of the right-hand circularly polarized signal and the left-hand circularly polarized signal of the passive antenna just cancel each other out and cannot be directly synthesized is solved. The technical solution provided by the embodiment of the present utility model can integrate the GNSS antenna and the SBAS antenna into an integrated design, which is simple to implement and can meet the reception requirements of the global SBAS signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. 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 paying any creative labor.

[0026] Figure 1 A schematic longitudinal section of a high-precision satellite signal antenna provided by an embodiment of the present utility model;

[0027] Figure 2 A three-dimensional diagram of a high-precision satellite signal antenna provided by an embodiment of the present utility model;

[0028] Figure 3 A schematic diagram of the feeding points corresponding to the feeding pins of the high-precision satellite signal antenna provided in an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of a first polarization decomposition network circuit in a high-precision satellite signal antenna provided by an embodiment of the present utility model;

[0030] Figure 5 The second schematic diagram of the first polarization decomposition network circuit in the high-precision satellite signal antenna provided by an embodiment of the present utility model;

[0031] Figure 6 A schematic diagram of a second polarization decomposition network circuit in a high-precision satellite signal antenna provided by an embodiment of the present utility model;

[0032] Figure 7 A schematic diagram of a combined circuit in a high-precision satellite signal antenna provided by an embodiment of the present utility model;

[0033] Figure 8 is the right-hand polarization pattern in the vertical plane of the GNSS L1 band;

[0034] Figure 9 is the vertical plane right-hand polarization pattern of the GNSS L2 band;

[0035] Figure 10 It is the left-hand polarization pattern in the vertical plane of the GNSS L1 band;

[0036] Figure 11 is the horizontal plane pattern of the 5G antenna;

[0037] Figure 12 is the vertical plane radiation pattern of the 5G antenna;

[0038] Figure 13 is the horizontal plane radiation pattern of the BT / Wi-Fi antenna;

[0039] Figure 14 is the vertical plane radiation pattern of the BT / Wi-Fi antenna;

[0040] Figure 15 This is a schematic diagram of the 5G antenna standing wave ratio;

[0041] Figure 16This is a diagram of BT / Wi-Fi standing wave ratio.

[0042] 1-L1 band patch antenna; 2-L2 band patch antenna; 3-PCB; 4-5G antenna; 5-short-range wireless communication antenna; 6-shielding cover; 11-top radiating surface of the L1 band patch antenna; 12-first feeding point corresponding to the first feed pin; 21-top radiating surface of the L2 band patch antenna; 22-second feeding point corresponding to the second feed pin; 41-third feeding point corresponding to the third feed pin; 51-fourth feeding point corresponding to the fourth feed pin. DETAILED DESCRIPTION

[0043] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0044] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] In order to solve the problem that the high-precision satellite signal antenna provided by the prior art cannot meet the need for receiving SBAS signals, an embodiment of the present utility model provides a high-precision satellite signal receiving antenna.

[0046] like Figure 1 and 2 As shown, the high-precision satellite signal receiving antenna provided by the embodiment of the present invention includes: an L2 band patch antenna 2, an L1 band patch antenna 1 and a printed circuit board (PCB) 3. Optionally, a shielding cover 6 may also be included.

[0047] The L2 band patch antenna 2 is located at the bottom layer of the antenna, is arranged on the top layer of the PCB 3, and resonates in the GNSS L2 band.

[0048] The L1 band patch antenna 1 is superimposed and mounted on the top radiation surface 21 of the L2 band patch antenna 2, resonating in the GNSS L1 band, and the frequency range includes the L-band frequency;

[0049] The vertical direction of the top radiating surface 11 of the L1 band patch antenna 1 is connected to the first polarization decomposition network circuit in the bottom layer of the PCB3 using a first feed needle. The GNSS L1 band signal is input into the first polarization decomposition network circuit through the first feed needle, and the first polarization decomposition network circuit decomposes the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L1 band.

[0050] The vertical direction of the top radiating surface 21 of the L2 band patch antenna 2 is connected to the second polarization decomposition network circuit in the bottom layer of the PCB 3 using a second feed needle. The GNSS L2 band signal is input into the second polarization decomposition network circuit through the second feed needle, and the right-hand circular polarization signal and the left-hand circular polarization signal of the GNSS L2 band are decomposed by the second polarization decomposition network circuit.

[0051] In this embodiment, the L2 band patch antenna 2 is formed with the top radiating surface 21 by using injection molding and electroplating processes.

[0052] In this embodiment, there are four first feed pins and four second feed pins, and the four first feed pins are orthogonally distributed along the center of the top radiation surface 11 of the L1 band patch antenna, and the four second feed pins are orthogonally distributed along the center of the top radiation surface 21 of the L2 band patch antenna. Figure 3 The four first feed pins correspond to the first feed points 12 and the four second feed pins correspond to the second feed points 22 .

[0053] In this embodiment, the first feed pin and the second feed pin are in any one of the following shapes: a cylindrical metal conductor, a rivet, a screw, etc.

[0054] In this embodiment, the first polarization decomposition network circuit may be composed of a 90° bridge, a 90° delay line, and a 50 ohm load circuit. Figure 4 shown. Figure 4 In the figure, feed point 1 (0°), feed point 2 (90°), feed point 3 (180°) and feed point 4 (270°) are the four first feeding points corresponding to the four first feed needles.

[0055] In this embodiment, the first polarization decomposition network circuit can also be composed of a balun and a 90° bridge. Figure 5 shown. Figure 5 In the figure, feed point 1 (0°), feed point 2 (90°), feed point 3 (180°) and feed point 4 (270°) are the four first feeding points corresponding to the four first feed needles.

[0056] Of course, the above Figure 4 and Figure 5 The first polarization decomposition network circuit shown is only a specific example. In actual use, the first polarization decomposition network circuit can also be designed into other feasible solutions, and each case will not be described here one by one.

[0057] In this embodiment, the second polarization decomposition network circuit may be composed of a 90° bridge, a 90° delay line, and a 50 ohm load circuit. Figure 6 shown.

[0058] In this embodiment, the second polarization decomposition network circuit may also be composed of a balun and a 90° bridge.

[0059] Of course, the second polarization decomposition network circuit described above is only a specific example. In actual use, the second polarization decomposition network circuit can also be designed into other feasible solutions, and each case will not be described here one by one.

[0060] Through the above Figure 4-6 The first polarization decomposition network circuit and the second polarization decomposition network circuit shown can decompose and obtain the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L1 band, as well as the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L2 band, thereby achieving the purpose of receiving and acquiring the GNSS right-hand circularly polarized signal of the L1 band, the SBAS right-hand circularly polarized signal of the L1 band, the SBAS left-hand circularly polarized signal of the L1 band, and the SBAS right-hand circularly polarized signal of the L2 band.

[0061] In this embodiment, the output end of the first polarization decomposition network circuit and the output end of the second polarization decomposition network circuit are connected to the signal combination circuit in the bottom layer of the PCB3, and the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L1 band and the right-hand circularly polarized signal of the GNSS L2 band are combined through the combination circuit.

[0062] In this embodiment, the signal combining circuit is composed of a filter, a low noise amplifier, a combiner and a broadband amplifier. Figure 7 shown.

[0063] pass Figure 7 As can be seen from the combined circuit shown, the technical solution provided by the embodiment of the utility model supports not only the reception of L-band left-hand circularly polarized and right-hand circularly polarized SBAS signals, but also the reception of L2-band left-hand circularly polarized and right-hand circularly polarized SBAS signals. The four signals, L1+L-band right-hand, L-band left-hand, L2 right-hand, and L2 left-hand, are output from the GNSS double-layer patch antenna through the L1 and L2 band polarization decomposition networks. These signals are then filtered by low-loss filters of the corresponding frequency bands, amplified by low-noise amplifiers, and then, after secondary filtering, combined into one signal using a combiner. Finally, they are amplified by a broadband amplifier and output to the integrated GNSS and SBAS receiver.

[0064] Optionally, in this embodiment, the edge of the top radiating surface 21 of the L2 band patch antenna 2 combines the radiator of the 5G antenna 4 and / or the radiator of the short-range wireless communication antenna 5, wherein the short-range wireless communication antenna 5 includes: a Bluetooth (BT) linear polarization antenna and a Wi-Fi linear polarization antenna.

[0065] In order not to affect the hemispherical shape of the directional pattern of the L2 band patch antenna 2, in this embodiment, the radiator of the 5G antenna 4 and / or the radiator of the short-range wireless communication antenna 5 are symmetrically distributed on the edge of the top radiation surface 21 of the L2 band patch antenna 2. For example, Figure 2 As shown, two radiators of the 5G antenna 4 and two radiators of the short-range wireless communication antenna 5 are symmetrically arranged on the edges of the top radiation surface 21 of the L2 band patch antenna 2.

[0066] In this embodiment, the vertical direction of the radiator of the 5G antenna 4 is connected to the connector in the bottom layer of the PCB2 using a third feed needle, wherein the layout of the third feed point 41 corresponding to the third feed needle can be exemplified as shown in FIG. Figure 3 As shown; and / or, the vertical direction of the radiator of the short-range wireless communication antenna 5 is connected to the connector using a fourth feed needle, wherein the layout of the fourth feed point 51 corresponding to the fourth feed needle can be exemplary as shown in FIG. Figure 3 shown.

[0067] By combining the radiator of the 5G antenna 4 and / or the radiator of the short-range wireless communication antenna 5 on the edge of the top radiating surface 21 of the L2 band patch antenna 2, 5G, BT and Wi-Fi can be integrated on the basis of the integrated design of GNSS and SBAS, so that the high-precision satellite signal antenna provided by the embodiment of the present invention can further receive 5G, BT and Wi-Fi signals, which is convenient for subsequent use.

[0068] Compared with the prior art, the technical solution provided by the embodiment of the present invention includes an L2 band patch antenna and an L1 band patch antenna, so that the technical solution provided by the embodiment of the present invention can receive global SBAS signals and GNSS signals in the L1 band and L2 band, solving the problem that the prior art can only receive GNSS signals and right-handed SBAS signals in the L1 band; a first polarization decomposition network circuit and a second polarization decomposition network circuit are provided, so that the technical solution provided by the embodiment of the present invention can obtain right-handed circularly polarized signals and left-handed circularly polarized signals in the GNSS L1 band, as well as GNSS The right-hand circularly polarized signal and the left-hand circularly polarized signal of the L2 band, that is, it can receive and obtain the right-hand circularly polarized signal of the GNSS in the L1 band, the right-hand circularly polarized signal of the SBAS in the L1 band, the left-hand circularly polarized signal of the SBAS in the L1 band, and the right-hand circularly polarized signal of the SBAS in the L2 band, the left-hand circularly polarized signal of the SBAS in the L2 band, etc., which solves the problem that the existing technology can only receive the right-hand circularly polarized GNSS signal of the L1 band and the global SBAS signal. Through the first polarization decomposition network circuit and the second polarization decomposition network circuit, the problem that the ±90° phase shift of the right-hand circularly polarized signal and the left-hand circularly polarized signal of the passive antenna just cancel each other out and cannot be directly synthesized is solved. The technical solution provided by the embodiment of the present utility model can integrate the GNSS antenna and the SBAS antenna into an integrated design, which is simple to implement and can meet the reception requirements of the global SBAS signal.

[0069] In order to enable those skilled in the art to more clearly understand the beneficial effects brought about by the technical solutions provided by the embodiments of the present invention, specific experimental data are provided below for illustration.

[0070] See for example Figure 8 The figure shows the right-handed vertical polarization pattern for the GNSS L1 band. The L1-band patch antenna 1 has a maximum gain exceeding 5dBi in the L1 band, an axial ratio of less than 2dB, and a gain of approximately -1dBi at a low elevation angle of 20 degrees, resulting in a nearly hemispherical antenna pattern. The L1-band patch antenna 1 has a front-to-back radiation ratio greater than 22dB, improving antenna efficiency while suppressing multipath interference signals, enhancing the positioning accuracy and stability of the GNSS receiver.

[0071] See for example Figure 9 The figure shows the right-handed vertical polarization pattern for the GNSS L2 band. The L2-band patch antenna 2 has a maximum gain exceeding 4dBi in the L2 band, an axial ratio of less than 3dB, and a gain of approximately -2dBi at a low elevation angle of 20 degrees, resulting in a nearly hemispherical antenna pattern. The L2-band patch antenna 2 has a front-to-back radiation ratio greater than 22dB, improving antenna efficiency while suppressing multipath interference signals, enhancing the positioning accuracy and stability of the GNSS receiver.

[0072] See for example Figure 10 The figure shows the vertical plane left-handed polarization pattern for the GNSS L1 band. The L1-band patch antenna 1 achieves a maximum left-handed gain exceeding 4dBi in the L-band, an axial ratio less than 1dB, and a gain greater than -3dBi at a low elevation angle of 20 degrees, resulting in a nearly hemispherical antenna pattern. The L-band antenna's front-to-back radiation ratio exceeds 22dB, improving antenna efficiency. The low-elevation gain exceeds -3dBi, enhancing the stability of GNSS receivers in receiving left-handed SBAS signals globally.

[0073] See for example Figure 11 Figure 2 shows the horizontal radiation pattern of a 5G antenna. 5G base stations and terminals are installed on the ground, and the horizontal orientation of the terminals is uncertain. Therefore, the horizontal gain and pattern circularity of 5G antenna 4 are important indicators affecting device communication reliability. When the device rotates, the smaller the horizontal gain variation, the more stable the system reception signal.

[0074] See for example Figure 12 Figure 2 shows the vertical radiation pattern of a 5G antenna. 5G base stations are installed on the ground, and terminals are also on the ground. The changes in base station height and terminal elevation angle require high gain at elevation angles of 0 to 30 degrees in the vertical direction of the terminal antenna to ensure stable communication.

[0075] See for example Figure 13 The figure shows the horizontal radiation pattern of the BT / Wi-Fi antenna. Figure 14 The figure shows the vertical radiation pattern of the BT / Wi-Fi antenna. The BT / Wi-Fi antenna only supports the 2.4 GHz band and has not been evaluated for the 5 GHz band. Since BT / Wi-Fi antennas are primarily used for communication between devices and handheld devices, with a communication range of approximately 10 meters, an antenna gain of at least -10 dBi will not affect device communication.

[0076] See for example Figure 15 Figure 2 shows a schematic diagram of the 5G antenna standing wave ratio (SWR). In this embodiment, 5G antenna 4 only supports the low-band frequency range; other frequencies were not evaluated. A lower SWR indicates higher transmission efficiency and less reflection.

[0077] See for example Figure 16 The figure below shows the BT / Wi-Fi VSWR diagram. BT / Wi-Fi only supports the 2.4GHz frequency band, where the VSWR is less than 2.

[0078] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0079] Embodiments of the present invention may be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, and the like that perform specific tasks or implement specific abstract data types. The present invention may also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communications network. In distributed computing environments, program modules may be located in local and remote computer storage media, including storage devices.

[0080] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, commodity, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, commodity, or device that includes the element.

[0081] The above is a detailed introduction to the image calling method and device provided by the utility model. Specific examples are used in this article to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea; at the same time, for general technical personnel in this field, based on the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A high-precision satellite signal antenna, characterized in that: include: L2 band patch antenna, L1 band patch antenna and printed circuit board PCB; wherein, The L2 band patch antenna is located at the bottom layer of the antenna, is arranged on the top layer of the PCB, and resonates in the GNSS L2 band of the global navigation satellite system; The L1 band patch antenna is superimposed and installed in the top radiation surface of the L2 band patch antenna, resonating in the GNSSL1 band, and the frequency range includes the L-band frequency; A first feed pin is used to connect a vertical line of the top radiation surface of the L1 band patch antenna to a first polarization decomposition network circuit in the bottom layer of the PCB. A GNSS L1 band signal is input into the first polarization decomposition network circuit through the first feed pin, and the first polarization decomposition network circuit decomposes the GNSS L1 band signal into a right-hand circularly polarized signal and a left-hand circularly polarized signal. The vertical direction of the top radiating surface of the L2 band patch antenna is connected to the second polarization decomposition network circuit in the bottom layer of the PCB using a second feed needle. The GNSS L2 band signal is input into the second polarization decomposition network circuit through the second feed needle, and the second polarization decomposition network circuit decomposes the GNSS L2 band into right-hand circularly polarized signals and left-hand circularly polarized signals.

2. The high-precision satellite signal antenna according to claim 1, characterized in that: There are four first feed needles and four second feed needles. The four first feed needles are orthogonally distributed along the center of the top radiation surface of the L1 band patch antenna, and the four second feed needles are orthogonally distributed along the center of the top radiation surface of the L2 band patch antenna.

3. The high-precision satellite signal antenna according to claim 1, characterized in that: The first feed needle and the second feed needle may be in any of the following forms: Cylindrical metal conductors, rivets and screws.

4. The high-precision satellite signal antenna according to claim 1, characterized in that: The first polarization decomposition network circuit is composed of a 90° bridge, a 90° delay line and a 50 ohm load circuit; or, The first polarization decomposition network circuit is composed of a balun and a 90° bridge.

5. The high-precision satellite signal antenna according to claim 1, characterized in that: The second polarization decomposition network circuit is composed of a 90° bridge, a 90° delay line and a 50 ohm load circuit; or, The second polarization decomposition network circuit is composed of a balun and a 90° bridge.

6. The high-precision satellite signal antenna according to claim 1, characterized in that: The output end of the first polarization decomposition network circuit and the output end of the second polarization decomposition network circuit are connected to the signal combination circuit in the bottom layer of the PCB, and the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L1 band, and the right-hand circularly polarized signal and the left-hand circularly polarized signal of the GNSS L2 band are combined through the combination circuit.

7. The high-precision satellite signal antenna according to claim 6, characterized in that: The signal combination circuit is composed of a filter, a low-noise amplifier, a combiner and a broadband amplifier.

8. The high-precision satellite signal antenna according to claim 1, characterized in that: The edge of the top radiating surface of the L2 band patch antenna is combined with the radiator of the 5G antenna and / or the radiator of the short-range wireless communication antenna, wherein the short-range wireless communication antenna includes: a Bluetooth BT linear polarization antenna and a Wi-Fi linear polarization antenna.

9. The high-precision satellite signal antenna according to claim 8, characterized in that: The radiator of the 5G antenna and / or the radiator of the short-range wireless communication antenna are symmetrically distributed on the edge of the top radiation surface of the L2 band patch antenna.

10. The high-precision satellite signal antenna according to claim 8, characterized in that: The vertical direction of the radiator of the 5G antenna is connected to the connector in the bottom layer of the PCB using a third feed pin; and / or, The vertical direction of the radiator of the short-range wireless communication antenna is connected to the connector using a fourth feed pin.

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