Dual-polarization satellite communication antenna

Abstract

A dual-polarized satellite communication antenna provided by the present invention comprises a dual-polarized antenna array surface, a vapor chamber, a plurality of radio frequency connectors and a transmit-receive assembly, the vapor chamber is installed and fixed on the transmit-receive assembly, the dual-polarized antenna array surface is installed on the vapor chamber, and the dual-polarized antenna array surface comprises a first antenna array and a second antenna array which are vertically arranged in a crossed manner. The transmitting and receiving assembly provides radio frequency signals of different phases to the first antenna array and / or the second antenna array through the radio frequency connector, so that when a radar detection function is carried out and a current linear polarization signal is interfered or the signal is not pure, the signal is transmitted to the first antenna array and / or the second antenna array. The dual-polarization satellite antenna can be switched into another linear polarization signal perpendicular to the dual-polarization satellite antenna, so that a reliable and stable radar detection function is kept.

Description

Technical Field

[0001] The invention relates to the field of communication antennas, and in particular to a dual-polarization satellite communication antenna. Background Art

[0002] When satellite communication antennas are used for radar detection, they generally adopt linear polarization working mode due to their working principle; when they are used for digital communication functions, they generally use circular polarization working mode. With the rapid development of satellite communication technology, the Starlink program and satellite launches are becoming more frequent, space satellites are increasing exponentially, and the space communication environment is deteriorating. Therefore, radar detection antennas and communication antennas for spacecraft need to resist interference from intersatellite clutter signals to ensure the success of system missions. Therefore, it is very necessary to propose a high-isolation dual-polarization satellite communication antenna that meets the requirements that satellite communication antennas can still maintain stable operation after being interfered by external interference signals in complex space environments.

[0003] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a high-isolation dual-polarization satellite communication antenna, which meets the requirement that the satellite communication antenna can still maintain stable operation after being interfered by external signals in a complex space environment.

[0005] To achieve the above-mentioned objectives, the present invention proposes a dual-polarization satellite communication antenna, comprising a dual-polarization antenna array, a heat spreader, multiple RF connectors and a transceiver assembly, wherein the heat spreader is mounted and fixed on the transceiver assembly, the dual-polarization antenna array is mounted on the heat spreader, and the transceiver assembly and the dual-polarization antenna array are RF-connected via the RF connector; the dual-polarization antenna array comprises a first antenna array and a second antenna array arranged vertically and crosswise, and the transceiver assembly provides RF signals of different phases to the first antenna array and / or the second antenna array via the RF connector.

[0006] Preferably, the heat spreader is provided with a plurality of through holes for the RF connector to pass through, and the upper surface of the transceiver assembly is provided with a plurality of RF channel openings, the first end of each of the RF connectors is arranged in the RF channel opening, and the second end passes through the through hole on the heat spreader to be connected to the first antenna array or the second antenna array.

[0007] Preferably, the first antenna array includes a plurality of first antenna units, the second antenna array includes a plurality of second antenna units, the number of the first antenna units and the number of the second antenna units are the same, and the first antenna units cross the second antenna units vertically.

[0008] Preferably, the first antenna array also includes a plurality of first RF connectors, which are arranged below the first antenna unit and connected one-to-one with the first antenna unit; the second antenna array also includes a plurality of second RF connectors, which are arranged below the second antenna unit and connected one-to-one with the second antenna unit; the first RF connector and the second RF connector are both connected one-to-one with the RF connector.

[0009] Preferably, the RF channel port includes a first channel port and a second channel port, the first channel port is connected to the first RF connector in a one-to-one correspondence through the RF connector, so that the first channel port corresponds to the first antenna unit in a one-to-one correspondence; the second channel port is connected to the second RF connector in a one-to-one correspondence through the RF connector, so that the second channel port corresponds to the second antenna unit in a one-to-one correspondence.

[0010] Preferably, the transceiver component adjusts the RF signals of the first channel port and the second channel port, thereby adjusting the presence and phase of the RF signals fed into the first RF connector and the second RF connector, so that the dual-polarized antenna array generates different polarization patterns.

[0011] Preferably, when only the first RF connector or the second RF connector has RF input, the dual-polarization antenna array generates a linear polarization pattern.

[0012] Preferably, when there is a 90° phase difference between the RF signals fed into the first RF connector and the second RF connector, the dual-polarization antenna array generates a circular polarization pattern.

[0013] Preferably, the phase of the radio frequency signal of each of the first channel port and the second channel port of the transceiver component can be dynamically adjusted from 0° to 354.375°.

[0014] Preferably, a plurality of lugs are provided on the outer side of the bottom of the transceiver assembly, through which the transceiver assembly is fixed to the satellite cabin; a power supply interface, a control interface, a first antenna array RF collection port, and a second antenna array RF collection port are also provided on the outer side of the bottom of the transceiver assembly.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages and beneficial effects:

[0016] This solution proposes a dual-polarization satellite communication antenna, including a dual-polarization antenna array, a heat spreader, multiple radio frequency connectors and a transceiver assembly, the heat spreader is fixed on the transceiver assembly, the dual-polarization antenna array is installed on the heat spreader, the dual-polarization antenna array includes a first antenna array and a second antenna array arranged crosswise and vertically, and the transceiver assembly provides radio frequency signals of different phases to the first antenna array and / or the second antenna array through the radio frequency connector, so that when performing a radar detection function, when the current linear polarization signal is interfered or the signal is impure, the dual-polarization satellite antenna of this solution can switch to another linear polarization signal perpendicular to it, so as to maintain a reliable and stable radar detection function;

[0017] The high-isolation dual-polarization satellite communication antenna of this solution has the ability to switch between left-hand circular polarization communication function or right-hand circular polarization communication function when performing communication function;

[0018] This solution is a satellite communication antenna, which can be extended to satellite-borne antenna products of various bands, functions, and array sizes, and is universal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of a dual-polarization satellite communication antenna;

[0020] Figure 2 A schematic diagram of the components of a dual-polarization satellite communication antenna;

[0021] Figure 3 A schematic top view of a dual-polarization satellite communication antenna;

[0022] Figure 4 is a side view schematic diagram of a dual-polarization satellite communication antenna;

[0023] Figure 5 It is a schematic diagram of the explosion of the structure of a single dual-polarized antenna unit;

[0024] Figure 6 is a schematic structural diagram of a first antenna unit;

[0025] Figure 7 is a schematic structural diagram of the second antenna unit;

[0026] Figure 8 is the first polarization radiation pattern;

[0027] Fig. 9 is the radiation pattern of the second plan;

[0028] Fig.10 is the left-hand circularly polarized radiation pattern;

[0029] Fig.11 It is the right-hand circularly polarized radiation pattern. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention Figures 1 to 11 , the technical solutions, structural features, objectives achieved and effects in the embodiments of the present invention are described in detail.

[0031] It should be noted that the drawings are in a very simplified form and use non-precise proportions. They are only used to conveniently and clearly assist in explaining the embodiments of the present invention, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention.

[0032] It should be noted that, in the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only the elements explicitly listed, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] See also Figures 1 to 3 , is a dual-polarization satellite communication antenna according to an embodiment of the present invention, comprising a dual-polarization antenna array 1, a heat spreader 2, a plurality of RF connectors 3 and a transceiver assembly 4, wherein the transceiver assembly 4 is an integrated transceiver assembly, the heat spreader 2 is fixed to the transceiver assembly 4 by a plurality of screws 5, and the dual-polarization antenna array 1 is installed on the heat spreader 2. The transceiver assembly 4 and the dual-polarization antenna array 1 are RF-connected via the RF connector 3. Specifically: the heat spreader 2 is provided with a plurality of through holes for the RF connector 3 to pass through, and the upper surface of the transceiver assembly 4 is provided with a plurality of RF channel openings 46, and the first end of each of the RF connectors 3 is arranged in the RF channel opening 46, and the second end passes through the through hole on the heat spreader 2 to be connected to the dual-polarization antenna array 1.

[0034] The dual-polarized antenna array 1 includes a first antenna array 11 and a second antenna array 12. The first antenna array 11 and the second antenna array 12 are both connected to the transceiver component 4 through the RF connector 3, so that the RF signal of the transceiver component 4 is fed into the dual-polarized antenna array 1. The transceiver component 4 can provide RF signals of different phases to the first antenna array 11 and / or the second antenna array 12 through the RF connector 3; the first antenna array 11 and the second antenna array 12 are arranged crosswise and vertically, so as to respectively generate two polarization forms with mutually orthogonal polarizations.

[0035] See also Figures 5 to 7 , the first antenna array 11 includes a plurality of first antenna units 111, the second antenna array 12 includes a plurality of second antenna units 121, the number of the first antenna units 111 and the second antenna units 121 are the same, and the first antenna units 111 and the second antenna units 121 are vertically crossed one by one to form a single dual-polarized antenna unit. In this embodiment, the first antenna array 11 includes 64 first antenna units 111, and the second antenna array 12 includes 64 second antenna units 121, forming a dual-polarized antenna array 1 with 8 rows and 8 columns.

[0036] The first antenna array 11 also includes a plurality of first RF connectors 112, the number of which is the same as the number of the first antenna units 111, the first RF connectors 112 are connected below the first antenna units 111, and each first antenna unit 111 is connected to a corresponding first RF connector 112 to achieve RF input. The second antenna array 12 also includes a plurality of second RF connectors 122, the number of which is the same as the number of the second antenna units 121, the second RF connectors 122 are connected below the second antenna units 121, and each second antenna unit 121 is connected to a corresponding second RF connector 122 to achieve RF input. Both the first RF connector 112 and the second RF connector 122 are SMP RF connectors, and their impedance is 50Ω.

[0037] Each of the first RF connector 112 and the second RF connector 122 is connected to the RF connector 3 in a one-to-one correspondence to feed the RF of the transceiver component 4 into the dual-polarized antenna array 1. The impedance of the RF connector 3 is also 50Ω.

[0038] The RF channel port 46 includes a first channel port 461 and a second channel port 462. The first channel port 461 is connected to the first RF connector 112 via the RF connector 3 in a one-to-one manner, so that the first channel port 461 corresponds to the first antenna unit 111; the second channel port 462 is connected to the second RF connector 112 via the RF connector 3 in a one-to-one manner, so that the second channel port 462 corresponds to the second antenna unit 121 in a one-to-one manner.

[0039] Since the first antenna array 11 and the second antenna array 12 are arranged orthogonally to each other, the dual-polarized antenna array 1 can generate multiple polarization patterns according to needs. Specifically, the transceiver component 4 adjusts the RF signal output from the first channel port 461 and the second channel port 462, thereby adjusting the presence and phase of the RF signal fed into the first RF connector 112 and the second RF connector 122, thereby enabling the dual-polarized antenna array 1 to generate different polarization patterns: when only the first RF connector 112 or the second RF connector 122 has RF input, the dual-polarized antenna array 1 generates a linear polarization pattern; when there is a 90° phase difference between the RF signals fed into the first RF connector 112 and the second RF connector 122, the dual-polarized antenna array 1 generates a circular polarization pattern.

[0040] See also Figure 8 When the first RF connector 112 has RF input and the second RF connector 122 has no RF input, a first polarized radiation pattern is generated, wherein the first antenna array 11 generates an H polarization pattern and the second antenna array 12 generates a V polarization pattern, and the maximum polarization isolation within the radiation range is better than 30dB.

[0041] See also Fig. 9 When the first RF connector 112 has no RF input and the second RF connector 122 has RF input, a second polarized radiation pattern is generated, wherein the first antenna array 11 generates a V-polarized pattern and the second antenna array 12 generates an H-polarized pattern, and the maximum polarization isolation within the radiation range is better than 25dB.

[0042] See also Fig.10 When the transceiver component 4 adjusts the RF channel port 46 so that the phase of the RF signal of the second RF connector 122 is 90° ahead of the first RF connector 112, the first antenna array 11 and the second antenna array 12 jointly synthesize a left-hand circular polarization pattern, and the maximum polarization isolation within the radiation range is better than 25dB.

[0043] See also Fig.11When the transceiver component 4 adjusts the RF channel port 46 so that the phase of the RF signal of the second RF connector 122 lags behind the first RF connector 112 by 90°, the first antenna array 11 and the second antenna array 12 jointly synthesize a right-hand circular polarization pattern, and the maximum polarization isolation within the radiation range is better than 40dB.

[0044] Furthermore, the phases of the radio frequency signals of each first channel port 461 and second channel port 462 of the transceiver assembly 4 can also be dynamically adjusted from 0° to 354.375°, so that the dual-polarized satellite communication antenna of this embodiment can scan at an off-axis angle of 67° and a rotation angle of 360°.

[0045] Please continue reading Figures 1 to 4 , the bottom outer side of the transceiver assembly 4 is provided with a plurality of lugs 41, through which the transceiver assembly 4 is fixed to the satellite cabin body, so that the dual-polarized satellite communication antenna of this embodiment is fixed to the satellite cabin body. The bottom outer side of the transceiver assembly 4 is also provided with a power supply interface 42, a control interface 43, a first antenna array RF collection port 44 and a second antenna array RF collection port 45. The power supply interface 42 is connected to an external power supply to provide power for the transceiver assembly 4. The control interface 43 is connected to an external antenna controller, and is used to control the phase information and amplitude information of the RF channel port 46 according to the information of the antenna controller, so that the dual-polarized satellite communication antenna forms beam scanning and phased array. The first antenna array RF collection port 44 is connected to each first channel port 461 to provide it with a RF signal, and the second antenna array RF collection port 45 is connected to each second channel port 462 to provide it with a RF signal. The interface impedance of the first antenna array RF collection port 44 and the second antenna array RF collection port 45 can be designed as needed, for example, 50Ω or 100Ω.

[0046] This embodiment can switch between a variety of polarization modes according to the current working conditions to adapt to communication and detection interference in different situations, thereby solving the problem of satellite communication antenna detection and communication functions being unable to communicate or channel interference due to interference from external signals in the increasingly complex space environment.

[0047] This embodiment can achieve reliable and stable communication functions by switching polarization modes when interfered by external signals or the current polarization purity is not high; this embodiment is a composite of phased array antennas with multi-polarization switchable transceiver channels, and has the capabilities of polarization switching, beam pointing, and adjustable directional patterns; this embodiment is a satellite data communication antenna, which can be extended to satellite-borne antenna products with various bands, various functions, various array sizes, and various radiation antenna power gain products.

[0048] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A dual-polarization satellite communication antenna, characterized in that: It includes a dual-polarized antenna array, a heat spreader, a plurality of radio frequency connectors and a transceiver assembly, wherein the heat spreader is fixed on the transceiver assembly, the dual-polarized antenna array is installed on the heat spreader, and the transceiver assembly and the dual-polarized antenna array are radio-frequency connected through the radio frequency connector; The dual-polarized antenna array includes a first antenna array and a second antenna array that are arranged vertically and crosswise, and the transceiver component provides radio frequency signals with different phases to the first antenna array and / or the second antenna array through the radio frequency connector.

2. A dual-polarization satellite communication antenna as claimed in claim 1, characterized in that: The heat spreader is provided with a plurality of through holes through which the RF connector can pass, and the upper surface of the transceiver assembly is provided with a plurality of RF channel openings, the first end of each of the RF connectors is arranged in the RF channel opening, and the second end passes through the through hole on the heat spreader to be connected to the first antenna array or the second antenna array.

3. A dual-polarization satellite communication antenna as claimed in claim 2, characterized in that: The first antenna array includes a plurality of first antenna units, and the second antenna array includes a plurality of second antenna units. The number of the first antenna units and the number of the second antenna units are the same, and the first antenna units cross the second antenna units vertically.

4. A dual-polarization satellite communication antenna as claimed in claim 3, characterized in that: The first antenna array also includes a plurality of first RF connectors, which are arranged below the first antenna unit and connected to the first antenna unit in a one-to-one correspondence; the second antenna array also includes a plurality of second RF connectors, which are arranged below the second antenna unit and connected to the second antenna unit in a one-to-one correspondence; the first RF connector and the second RF connector are both connected to the RF connector in a one-to-one correspondence.

5. A dual-polarization satellite communication antenna as claimed in claim 4, characterized in that: The RF channel port includes a first channel port and a second channel port, the first channel port is connected to the first RF connector in a one-to-one correspondence through the RF connector, so that the first channel port corresponds to the first antenna unit in a one-to-one correspondence; the second channel port is connected to the second RF connector in a one-to-one correspondence through the RF connector, so that the second channel port corresponds to the second antenna unit in a one-to-one correspondence.

6. A dual-polarization satellite communication antenna as claimed in claim 5, characterized in that: The transceiver component adjusts the RF signals of the first channel port and the second channel port, thereby adjusting the presence and phase of the RF signals fed into the first RF connector and the second RF connector, so that the dual-polarized antenna array generates different polarization patterns.

7. A dual-polarization satellite communication antenna as claimed in claim 6, characterized in that: When only the first RF connector or the second RF connector has RF input, the dual-polarization antenna array generates a linear polarization pattern.

8. A dual-polarization satellite communication antenna as claimed in claim 6, characterized in that: When there is a 90° phase difference between the RF signals fed into the first RF connector and the second RF connector, the dual-polarized antenna array generates a circular polarization pattern.

9. A dual-polarization satellite communication antenna as claimed in claim 6, characterized in that: The phase of the radio frequency signal of each of the first channel port and the second channel port of the transceiver component can achieve 0°~ 354.375° dynamic adjustment.

10. A dual-polarization satellite communication antenna as claimed in claim 6, characterized in that: A plurality of lugs are provided on the outer side of the bottom of the transceiver assembly, and the transceiver assembly is fixed to the satellite cabin through the lugs; The bottom outer side of the transceiver component is also provided with a power supply interface, a control interface, a first antenna array RF collection port and a second antenna array RF collection port.

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