Method for improving performance of space-borne rness navigation service system

Abstract

The application provides a method for improving performance of a spaceborne RNSS navigation service system, which comprises optimizing an antenna array, increasing a beam range and antenna gain, and improving power amplifier output power, so as to further improve service capability of the Beidou navigation satellite system for users at an orbital altitude of 36000km without increasing implementation complexity of the Beidou navigation satellite system and without adding additional single machines or antennas.

Description

Technical Field

[0001] This invention relates to the field of navigation satellite technology, and in particular to a method for improving the performance of a spaceborne RNSS navigation service system. Background Technology

[0002] Satellite navigation systems provide precise and continuous three-dimensional position, velocity, and time information to users worldwide with corresponding receiving equipment via satellites. They have become a fundamental strategic infrastructure closely related to national security and socio-economic development.

[0003] Generally, the service airspace of satellite navigation systems covers the area below the Earth's surface and a certain altitude (e.g., 3000 km). Within this area, which is within the pointing range of the satellite's transmitting antenna main lobe, the received satellite signal strength is guaranteed, and the probability of simultaneously seeing four or more satellites is close to 100%. However, with the enhancement of human space exploration capabilities and the expansion of activity range, the number of high-orbit (above 3000 km) satellites and spacecraft is increasing. Space exploration, ground remote sensing, broadcasting and communication, and various satellite constellation networking and formation flying all require more continuous, accurate, and real-time orbit determination and PVT measurement services. To address the navigation and positioning needs of medium- and high-orbit and deep-space user spacecraft, these spacecraft can be equipped with navigation receivers to capture the radiation signals from the edges and side lobes of the navigation satellite system's antenna main lobe to achieve positioning, timing, and auxiliary orbit determination functions. Figure 1 As shown. However, the existing BeiDou navigation satellites lack sufficient service capabilities for high-orbit users at an altitude of 36,000 km and need further improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a method for improving the performance of a spaceborne RNSS navigation service system, in order to address the problem that the existing BeiDou navigation satellites have insufficient service capabilities for high-orbit users at an altitude of 36,000 km, and that further improvements are needed.

[0005] To address the aforementioned technical problems, this invention provides a method for improving the performance of a spaceborne RNSS navigation service system, comprising:

[0006] Without increasing the complexity of the BeiDou navigation satellite system or adding additional units or antennas, the antenna array is optimized to increase the beam range and antenna gain, while the power amplifier output power is increased, so as to further improve the service capability of the BeiDou navigation satellite system for users at an orbital altitude of 36,000 km.

[0007] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0008] Under the condition that the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System gradually decreases outside the ±13.2° beam, the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is increased to achieve the following effect:

[0009] Without increasing the complexity of implementing the BeiDou navigation satellite system, and without adding any additional individual units or antennas,

[0010] Reduce the gain roll-off at the main lobe edge and side lobes of the RNSS antenna in the BeiDou navigation satellite system.

[0011] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0012] Under the condition that the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System gradually decreases outside the ±13.2° beam, the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is increased to achieve the following effect:

[0013] Without increasing the complexity of implementing the BeiDou navigation satellite system, and without adding any additional individual units or antennas,

[0014] Improve the consistency, antenna gain, and power amplifier output power of the RNSS antenna in the BeiDou navigation satellite system across different cross sections.

[0015] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0016] Under the condition that the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System gradually decreases outside the ±13.2° beam, the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is increased to achieve the following effect:

[0017] Without increasing the complexity of implementing the BeiDou navigation satellite system, and without adding any additional individual units or antennas,

[0018] Achieve 100% availability to users at an orbital altitude of 36,000 km.

[0019] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0020] By optimizing the antenna array of the RNSS antenna of the BeiDou Navigation Satellite System and increasing the power amplifier output power of the RNSS antenna of the BeiDou Navigation Satellite System, the EIRP of the civilian signal B1I at the ±34.3° beam is improved.

[0021] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0022] By calculating the signal power at the aperture of the GEO user receiving antenna, it was found that the signal power at the aperture of the GEO user receiving antenna is not less than -180.85 dBW.

[0023] By comparing the signal power at the antenna aperture of the GEO user and the threshold of the receiver system including the antenna, it is verified that the improved B1I signal signal power at ±34.3° can meet the receiver threshold requirements of the GEO user, achieving 100% availability for users at an orbital altitude of 36,000 km.

[0024] The threshold for the receiver system, including the antenna, is -181 dBW.

[0025] Optionally, in the aforementioned method for improving the performance of a spaceborne RNSS navigation service system, the improved B1I parameters include:

[0026] The satellite transmit EIRP of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is 13.73–20.93 dBW.

[0027] The BeiDou navigation satellite transmits signals at a frequency of 1561MHz;

[0028] The free space range of the BeiDou Navigation Satellite System is 69,000 km;

[0029] The free space loss of the BeiDou navigation satellite system is -193.08 dB.

[0030] The combined polarization and pointing loss of the BeiDou navigation satellite system is -1.5dB.

[0031] The voltage level of the user receiving antenna of the BeiDou Navigation Satellite System is -180.85 to -173.65 dBW.

[0032] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0033] The first mode is used to serve the Earth's surface and the airspace below 3000km. The first mode includes: a conventional high-power amplifier combined with an array antenna in a saddle shape.

[0034] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0035] The second mode serves the airspace at an orbital altitude of 36,000 km above the Earth's surface. The second mode includes the use of an ultra-high power amplifier with an output power greater than that of a conventional high power amplifier.

[0036] Increase the beam range of the antenna array, optimize the cross-section consistency, and improve the beam edge gain;

[0037] By employing ultra-high power amplifiers, increasing the antenna array beam range, optimizing cross-section consistency, and improving beam edge gain, the performance of the beam is improved within a range of ±34.3°.

[0038] Optionally, the method for improving the performance of the spaceborne RNSS navigation service system further includes:

[0039] The antenna array layout is optimized by using 12 spiral element antennas.

[0040] Appropriate amplitude and phase weighting is applied to each antenna element.

[0041] Optimize the aperture distribution function according to requirements and perform beamforming, including:

[0042]

[0043] in The radiation pattern of the array antenna. This is the radiation pattern of a single antenna element. As array factor, These are the off-axis angle and azimuth angle;

[0044] The above steps are used to raise the ±34.3° beam of the RNSS antenna array;

[0045] At the same time, the existing navigation and launch system will be upgraded by adopting GaN solid-state power amplifiers with an output power of 300W or higher to improve the service performance of the downlink beam main lobe edge and side lobe of navigation satellites and enhance the service capability for high-orbit spacecraft.

[0046] The inventors of this invention have discovered through research that the general performance of current GEO user satellite receiver systems is as follows:

[0047] Antenna dimensions: 140*140*452.5mm;

[0048] Antenna gain: ≥7dB (±30° beamwidth);

[0049] Receiver sensitivity (excluding antenna): -174dBW.

[0050] With the above-mentioned satellite receiver system configured at the GEO user terminal, without considering receiver threshold requirements, a downlink antenna beam angle of ±34.3° for 24 BeiDou MEO satellites can achieve 100% quadruple coverage of an area at an altitude of 36,000 km, with an average PDOP of approximately 83.96, and a positioning accuracy of ten to one hundred meters.

[0051] However, in the current design of the BeiDou Navigation Satellite System's RNSS antenna, in order to ensure that the received signal power reaching all parts of the Earth's surface is basically the same, the RNSS antenna uses an array antenna for beamforming. This results in a "saddle" shape within the off-axis angle range of 0–13.2° (Earth's Edge Obstruction Angle). Beyond 13.2°, the gain gradually decreases, and the antenna performance at the main lobe edges and side lobes is not guaranteed. This leads to a large gain roll-off at the main lobe edges and side lobes, and significant differences between different beam sections. Figure 2 As shown.

[0052] The signal power at the aperture of the GEO user receiving antenna is calculated based on the EIRP of the BeiDou navigation satellite civilian signal B1I at the ±34.3° beam, as shown in Table 1.

[0053] Table 1

[0054] Satellite launched at EIRP (±34.3°) dBW -13.27～13.93 Satellite transmission signal frequency MHz 1561 Free space distance km 69000 Free space loss dB -193.08 Comprehensive analysis of polarization and pointing loss, etc. dB -1.5 User receive antenna aperture level dBW -207.85～-180.65

[0055] It is evident that the signal power at ±34.3° of the BeiDou B1I beam is insufficient to fully meet the receiver threshold requirements of GEO users (the threshold for the receiver system including the antenna is -181dBW), thus failing to achieve 100% quadruple coverage. Therefore, the service capability of BeiDou navigation satellites for high-orbit users at an altitude of 36,000km is inadequate and needs further improvement.

[0056] In the performance enhancement method of the spaceborne RNSS navigation service system provided by this invention, the antenna array is optimized without increasing the implementation complexity of the BeiDou navigation satellite system or adding any additional units or antennas. This optimization increases the beam range and antenna gain, while simultaneously improving the power amplifier output power. This further enhances the service capability of the BeiDou navigation satellite system for users at an orbital altitude of 36,000 km. It addresses the current problem of poor service capability and difficulty in achieving 100% availability for high-orbit spacecraft at an orbital altitude of 36,000 km by current navigation satellites. The method further extends navigation satellite services into the depths of space. Without increasing the implementation complexity of the satellite system or adding any additional units or antennas, the RNSS antenna array of the navigation satellite system is optimized to increase the beam range and antenna gain, while simultaneously improving the power amplifier output power. This meets the receiver threshold requirements for users at an orbital altitude of 36,000 km, achieving 100% availability. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of existing GEO satellites receiving radiation signals from the main lobe edge and side lobes of navigation satellites;

[0058] Figure 2 This is a schematic diagram showing the large roll-off of the main lobe edge and side lobe beam gain due to the current orientation of the BeiDou B1I antenna.

[0059] Figure 3This is a schematic diagram of the B1I antenna direction of the improved performance enhancement method for the spaceborne RNSS navigation service system in one embodiment of the present invention;

[0060] Figure 4 This is a schematic diagram of the overall scheme of the performance improvement method of the spaceborne RNSS navigation service system in one embodiment of the present invention;

[0061] Figure 5 This is a schematic diagram of the optimized antenna array layout of the performance improvement method for a spaceborne RNSS navigation service system according to an embodiment of the present invention;

[0062] Figure 6 This is a schematic diagram of the overall optimized architecture of the performance improvement method for a spaceborne RNSS navigation service system according to an embodiment of the present invention. Detailed Implementation

[0063] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0064] It should be noted that the components in the various figures may be shown exaggeratedly for illustrative purposes and are not necessarily to scale. In each figure, the same reference numerals are used for components that are identical or have the same function.

[0065] In this invention, unless otherwise specified, "arranged on," "arranged above," and "arranged on top of" do not exclude the possibility of an intermediate element between them. Furthermore, "arranged on or above" merely indicates the relative positional relationship between two components, and in certain cases, such as when the product orientation is reversed, it can also be converted to "arranged below or under," and vice versa.

[0066] In this invention, the various embodiments are merely intended to illustrate the solutions of the invention and should not be construed as limiting.

[0067] In this invention, unless otherwise specified, the quantifiers “a” and “one” do not exclude scenarios involving multiple elements.

[0068] It should also be noted that, in the embodiments of the present invention, only a portion of the components or parts may be shown for clarity and simplicity. However, those skilled in the art will understand that, under the teachings of the present invention, necessary components or parts can be added as needed for specific scenarios. Furthermore, unless otherwise stated, features in different embodiments of the present invention can be combined with each other. For example, a feature in the second embodiment can replace a corresponding or functionally identical or similar feature in the first embodiment, and the resulting embodiment will also fall within the scope of disclosure or description of this application.

[0069] It should also be noted that, within the scope of this invention, the terms "same," "equal," and "equal to" do not imply that the two values ​​are absolutely equal, but rather allow for a certain reasonable margin of error. In other words, the terms also encompass "substantially the same," "substantially equal," and "substantially equal to." Similarly, in this invention, the directional terms "perpendicular to," "parallel to," etc., also encompass the meanings of "substantially perpendicular to" and "substantially parallel to."

[0070] Furthermore, the numbering of the steps in the methods of the present invention does not limit the execution order of the method steps. Unless otherwise specified, the method steps may be executed in different orders.

[0071] The performance improvement method for the spaceborne RNSS navigation service system proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0072] The purpose of this invention is to provide a method for improving the performance of a spaceborne RNSS navigation service system, in order to address the problem that the existing BeiDou navigation satellites have insufficient service capabilities for high-orbit users at an altitude of 36,000 km, and that further improvements are needed.

[0073] To achieve the above objectives, the present invention provides a method for improving the performance of a spaceborne RNSS navigation service system, comprising: optimizing the antenna array, increasing the beam range and antenna gain, and increasing the power amplifier output power without increasing the implementation complexity of the BeiDou navigation satellite system or adding additional single units or antennas, so as to further improve the service capability of the BeiDou navigation satellite system for users at an orbital altitude of 36,000 km.

[0074] Addressing the current limitations of the BeiDou Navigation Satellite System's RNSS antenna, such as gradual gain attenuation outside the ±13.2° beam, large gain roll-off at the main lobe edges and side lobes, poor consistency across different sections, and low gain, this invention proposes an optimization scheme to achieve 100% availability for users at an orbital altitude of 36,000 km without increasing the complexity of the satellite system or adding additional units or antennas. This scheme optimizes the antenna array, increases the beam range and antenna gain, and simultaneously improves the power amplifier output power. The ±34.3° beam of the RNSS antenna is raised, for example... Figure 3 As shown.

[0075] An embodiment of the present invention provides a method for improving the performance of a spaceborne RNSS navigation service system, comprising: optimizing the antenna array, increasing the beam range and antenna gain, and increasing the power amplifier output power without increasing the implementation complexity of the BeiDou navigation satellite system or adding additional single units or antennas, so as to further improve the service capability of the BeiDou navigation satellite system for users at an orbital altitude of 36,000 km.

[0076] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: under the condition that the antenna gain outside the ±13.2° beam of the RNSS antenna of the BeiDou navigation satellite system gradually decreases, the antenna gain of the RNSS antenna of the BeiDou navigation satellite system at the ±34.3° beam is increased to achieve the following effect: without increasing the implementation complexity of the BeiDou navigation satellite system, without adding additional single units or antennas, the antenna gain roll-off at the main lobe edge and side lobes of the RNSS antenna of the BeiDou navigation satellite system is reduced.

[0077] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: under the condition that the antenna gain outside the ±13.2° beam of the RNSS antenna of the BeiDou navigation satellite system gradually decreases, the antenna gain of the RNSS antenna of the BeiDou navigation satellite system at the ±34.3° beam is increased to achieve the following effect: without increasing the implementation complexity of the BeiDou navigation satellite system, without adding additional single units or antennas, the consistency between various sections of the RNSS antenna of the BeiDou navigation satellite system, the antenna gain, and the power amplifier output power are improved.

[0078] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: under the condition that the antenna gain outside the ±13.2° beam of the RNSS antenna of the BeiDou navigation satellite system gradually decreases, the antenna gain of the RNSS antenna of the BeiDou navigation satellite system at the ±34.3° beam is increased to achieve the following effect: without increasing the implementation complexity of the BeiDou navigation satellite system, without adding additional single units or antennas, 100% availability to users at an orbital altitude of 36,000 km is achieved.

[0079] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: optimizing the antenna array of the RNSS antenna of the BeiDou navigation satellite system and increasing the power amplifier output power of the RNSS antenna of the BeiDou navigation satellite system to improve the EIRP of the civilian signal B1I at the ±34.3° beam.

[0080] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: calculating the signal power at the aperture of the GEO user receiving antenna to obtain a signal power at the aperture of the GEO user receiving antenna of not less than -180.85 dBW; verifying that the improved signal power at ±34.3° of the B1I signal can meet the GEO user receiver threshold requirement by comparing the signal power at the aperture of the GEO user receiving antenna with the threshold of the receiver system including the antenna, thus achieving 100% availability for users at an orbital altitude of 36,000 km; wherein the threshold of the receiver system including the antenna is -181 dBW.

[0081] In one embodiment of the present invention, the antenna array layout (composed of 12 helical element antennas) is optimized, and the array arrangement is optimized, such as... Figure 5 As shown, appropriate amplitude and phase weighting is applied to each antenna element, i.e., the aperture distribution function is optimized according to requirements, and beamforming is performed. in The radiation pattern of the array antenna. This is the radiation pattern of a single antenna element. As array factor, (For off-axis angle and azimuth angle), such as Figure 3 As shown, the RNSS antenna array's ±34.3° beam is raised, and the existing navigation transmission system is upgraded by using GaN solid-state power amplifiers with an output power of 300W or higher. The overall architecture is as follows. Figure 6 As shown, this improves the service performance of the main lobe edge and sidelobe of the downlink beam of navigation satellites, thereby enhancing the service capability for high-orbit spacecraft.

[0082] By optimizing the antenna array and increasing the power amplifier output power, the EIRP of the civilian signal B1I at ±34.3° beamwidth can be improved. The signal power at the aperture of the GEO user receiving antenna is calculated as shown in Table 2. It can be seen that the signal power at the aperture of the GEO user receiving antenna is not less than -180.85dBW. The improved B1I signal power at ±34.3° can basically meet the threshold requirements of the GEO user receiver (the threshold of the receiver system including the antenna is -181dBW), achieving 100% availability.

[0083] Table 2

[0084] Satellite launched at EIRP (±34.3°) dBW 13.73～20.93 Satellite transmission signal frequency MHz 1561 Free space distance km 69000 Free space loss dB -193.08 Comprehensive analysis of polarization and pointing loss, etc. dB -1.5 User receive antenna aperture level dBW -180.85～-173.65

[0085] In one embodiment of the present invention, in the performance improvement method of the spaceborne RNSS navigation service system, the improved B1I parameters include: the satellite transmit EIRP of the RNSS antenna of the BeiDou navigation satellite system at the ±34.3° beam is 13.73~20.93dBW; the transmit signal frequency of the BeiDou navigation satellite is 1561MHz; the free space distance of the BeiDou navigation satellite system is 69000km; the free space loss of the BeiDou navigation satellite system is -193.08dB; the combined polarization and pointing loss of the BeiDou navigation satellite system is -1.5dB; and the aperture level of the user receiving antenna of the BeiDou navigation satellite system is -180.85~-173.65dBW.

[0086] This invention proposes a scheme to optimize the antenna array, increase beam range and antenna gain, and simultaneously improve power amplifier output power without increasing the complexity of the satellite system or adding additional units or antennas. This further enhances the service capability of the BeiDou navigation satellite system for users at an orbital altitude of 36,000 km. Figure 4 As shown.

[0087] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: using a first mode to serve the Earth's surface and the airspace below 3000km, wherein the first mode includes: a conventional high-power amplifier combined with an array antenna in a saddle shape.

[0088] In one embodiment of the present invention, the method for improving the performance of the spaceborne RNSS navigation service system further includes: using a second mode to serve the airspace range at an orbital altitude of 36,000 km above the Earth's surface. The second mode includes: using an ultra-high power amplifier with an output power greater than that of a conventional high power amplifier; increasing the antenna array beam range, optimizing the cross-sectional consistency, and improving the beam edge gain; and improving the performance within a beam range of ±34.3° by using an ultra-high power amplifier, increasing the antenna array beam range, optimizing the cross-sectional consistency, and improving the beam edge gain.

[0089] In summary, the above embodiments have provided detailed descriptions of different configurations for improving the performance of a spaceborne RNSS navigation service system. Of course, this invention includes, but is not limited to, the configurations listed in the above embodiments. Any modifications made based on the configurations provided in the above embodiments are within the scope of protection of this invention. Those skilled in the art can apply the principles described in the above embodiments to other similar applications.

[0090] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0091] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A method for improving the performance of a spaceborne RNSS navigation service system, characterized in that, include: Without increasing the complexity of the BeiDou navigation satellite system or adding additional units or antennas, the antenna array is optimized to increase the beam range and antenna gain, while simultaneously improving the power amplifier output power. This further enhances the BeiDou navigation satellite system's service capability for users at an orbital altitude of 36,000 km. The method also includes: The antenna array layout is optimized by using 12 spiral element antennas. Appropriate amplitude and phase weighting is applied to each antenna element. Optimize the aperture distribution function according to requirements and perform beamforming, including: in The radiation pattern of the array antenna. This is the radiation pattern of a single antenna element. As array factor, These are the off-axis angle and azimuth angle; The above steps are used to raise the ±34.3° beam of the RNSS antenna array; Simultaneously, the existing navigation and launch system will be upgraded by adopting GaN solid-state power amplifiers with an output power of 300W or higher to improve the service performance of the downlink beam main lobe edge and sidelobe of navigation satellites, thereby enhancing the service capability for high-orbit spacecraft. Specifically: The satellite transmit EIRP of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is 13.73–20.93 dBW. The BeiDou navigation satellite transmits signals at a frequency of 1561MHz; The free space range of the BeiDou Navigation Satellite System is 69,000 km; The free-space loss of the BeiDou navigation satellite system is -193.08 dB. The combined polarization and pointing loss of the BeiDou navigation satellite system is -1.5dB. The user receiving antenna aperture level of the BeiDou Navigation Satellite System is -180.85 to -173.65 dBW; The method also includes: By calculating the signal power at the aperture of the GEO user receiving antenna, it was found that the signal power at the aperture of the GEO user receiving antenna is not less than -180.85 dBW. By comparing the signal power at the antenna aperture of the GEO user and the threshold of the receiver system including the antenna, it is verified that the improved B1I signal signal power at ±34.3° can meet the receiver threshold requirements of the GEO user, achieving 100% availability for users at an orbital altitude of 36,000 km. The threshold for the receiver system, including the antenna, is -181 dBW; The antenna dimensions are 140*140*452.5mm; The antenna gain is ≥7dB (±30°) and the beamwidth is ≥7dB.

2. The method for improving the performance of a spaceborne RNSS navigation service system as described in claim 1, characterized in that, Also includes: Under the condition that the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System gradually decreases outside the ±13.2° beam, the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is increased to achieve the following effect: Without increasing the complexity of implementing the BeiDou navigation satellite system, and without adding any additional individual units or antennas, Reduce the gain roll-off at the main lobe edge and side lobes of the RNSS antenna in the BeiDou navigation satellite system.

3. The method for improving the performance of a spaceborne RNSS navigation service system as described in claim 1, characterized in that, Also includes: Under the condition that the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System gradually decreases outside the ±13.2° beam, the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is increased to achieve the following effect: Without increasing the complexity of implementing the BeiDou navigation satellite system, and without adding any additional individual units or antennas, Improve the consistency, antenna gain, and power amplifier output power of the RNSS antenna in the BeiDou navigation satellite system across different cross sections.

4. The method for improving the performance of a spaceborne RNSS navigation service system as described in claim 1, characterized in that, Also includes: Under the condition that the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System gradually decreases outside the ±13.2° beam, the antenna gain of the RNSS antenna of the BeiDou Navigation Satellite System at the ±34.3° beam is increased to achieve the following effect: Without increasing the complexity of implementing the BeiDou navigation satellite system, and without adding any additional individual units or antennas, Achieve 100% availability to users at an orbital altitude of 36,000 km.

5. The method for improving the performance of a spaceborne RNSS navigation service system as described in claim 2, characterized in that, Also includes: By optimizing the antenna array of the RNSS antenna of the BeiDou Navigation Satellite System and increasing the power amplifier output power of the RNSS antenna of the BeiDou Navigation Satellite System, the EIRP of the civilian signal B1I at the ±34.3° beam is improved.

6. The method for improving the performance of a spaceborne RNSS navigation service system as described in claim 1, characterized in that, Also includes: The first mode is used to serve the Earth's surface and the airspace below 3000km. The first mode includes: a conventional high-power amplifier combined with an array antenna in a saddle shape.

7. The method for improving the performance of a spaceborne RNSS navigation service system as described in claim 1, characterized in that, Also includes: The second mode serves the airspace at an orbital altitude of 36,000 km above the Earth's surface. The second mode includes the use of an ultra-high power amplifier with an output power greater than that of a conventional high power amplifier. Increase the beam range of the antenna array, optimize the cross-section consistency, and improve the beam edge gain; By employing ultra-high power amplifiers, increasing the antenna array beam range, optimizing cross-section consistency, and improving beam edge gain, the performance of the beam is improved within a range of ±34.3°.

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