Columnar parabolic reflector system SAR antenna and satellite

Abstract

The utility model relates to a cylindrical parabolic reflector system SAR antenna and a satellite, and belongs to the technical field of spaceborne antennas. The antenna comprises an SAR cylindrical parabolic reflector and a phased array feed source, the SAR cylindrical parabolic reflector comprises an expandable truss, the expandable truss comprises a first parabola expansion joint, a second parabola expansion joint and a baseline expansion joint, and the first parabola expansion joint is connected with the second parabola expansion joint. The expandable truss can be expanded and locked in the parabola direction through the first parabola expansion joint and the second parabola expansion joint; the deployable truss can be deployed and locked in the baseline direction through the baseline deployment joints. According to the utility model, the rapid unfolding and locking of the SAR antenna of the cylindrical parabolic reflector system are realized, the structure is simple, electric energy is not needed in the unfolding and locking process, and the electric energy consumption of a satellite is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of satellite-borne antennas, in particular to a columnar parabolic reflector system SAR antenna and a satellite. Background Art

[0002] At present, satellite-borne antennas are widely used on various satellites in Earth orbit, and their tasks include ground communication, observation, reconnaissance, remote sensing, meteorology, etc. Modern satellite applications require multi-functions, large capacity, multi-band, high power, etc., which all require antennas with larger apertures. By increasing the aperture of the antenna, the antenna can have higher gain and wider frequency bandwidth, improve the satellite's observation range and observation accuracy, and also reduce the size of ground receiving equipment. Satellite-borne cylindrical parabolic reflector antennas have the advantages of high gain, strong directivity, easy light-speed scanning, and multi-band sharing due to the unique shaping method of the reflector. The cylindrical parabolic deployable antenna plays an irreplaceable role in the field of satellite-borne antennas.

[0003] The existing cylindrical parabolic reflector antenna deployment process generally uses a shape memory carbon fiber composite material system component or a driving rope to drive the cylindrical parabolic reflector antenna to deploy; when a shape memory alloy component is used to drive the cylindrical parabolic reflector antenna to deploy, it is necessary to stick a heating film on the outer surface of the shape memory alloy component and cover it with multiple layers, and the heating film is electrically heated to achieve the deployment and fixation of the cylindrical parabolic reflector antenna after deployment; when a driving rope is used to drive the cylindrical parabolic reflector antenna to deploy, it is necessary to control the driving rope by a motor to control the deployment of the cylindrical parabolic reflector antenna, and fix the deployed cylindrical parabolic reflector antenna by fixing the driving rope after deployment; the above deployment and fixation methods of the cylindrical parabolic reflector antenna are relatively complex in structure, and a certain amount of electrical energy is required to achieve the deployment and fixation of the cylindrical parabolic reflector antenna, which undoubtedly increases the energy consumption of satellites operating in space. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a cylindrical parabolic reflector system SAR antenna and satellite to solve at least one of the problems of the existing cylindrical parabolic reflector antenna, namely, the complex structure and the need to consume electric energy during the deployment and fixing process.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] A cylindrical parabolic reflector SAR antenna, comprising a SAR cylindrical parabolic reflector, wherein the SAR cylindrical parabolic reflector comprises an expandable truss, wherein the expandable truss comprises a plurality of parabolic cylindrical support ribs, wherein the parabolic cylindrical support ribs comprise a first parabolic expansion joint;

[0007] The first parabolic expansion joint includes a first expansion device, which includes an outer shell, a rotating shaft, a scroll spring, a locking groove, an elastic pressure plate and a locking pin, and the locking pin can be inserted into the locking groove; the rotating shaft is rotatably connected to the outer shell; one end of the scroll spring is fixedly connected to the rotating shaft, and the other end is fixedly connected to the outer shell, and the scroll spring is used to drive the outer shell to rotate; the elastic pressure plate is fixedly connected to the locking pin, and the elastic pressure plate is used to press the locking pin into the locking groove.

[0008] Furthermore, the second parabolic deployment joint includes a third connecting rod and a second deployment device and a third deployment device arranged at both ends of the third connecting rod, and the structures of the second deployment device and the third deployment device are the same as the structure of the first deployment device; the deployable truss also includes a baseline deployment mechanism, and the baseline deployment mechanism is used to drive multiple parabolic cylindrical support ribs to deploy along the baseline direction; the baseline deployment mechanism includes a baseline deployment joint, and the baseline deployment joint has the same structure as the second parabolic deployment joint.

[0009] Furthermore, the parabolic cylindrical support rib also includes a root rib bar, an intermediate rib bar and an end rib bar, the root rib bar and the intermediate rib bar are connected by a first parabola expansion joint, and the intermediate rib bar and the end rib bar are connected by a second parabola expansion joint.

[0010] Furthermore, the first parabolic deployment joint also includes a first connecting rod and a second connecting rod, the two ends of the first connecting rod are respectively fixedly connected to the root rib rod and the rotating shaft in the first deployment device, and the two ends of the second connecting rod are respectively fixedly connected to the outer shell and the middle rib rod in the first deployment device.

[0011] Furthermore, the second parabolic deployment joint also includes a fourth connecting rod and a fifth connecting rod; the two ends of the third connecting rod are respectively fixedly connected to the outer shell in the second deployment device and the outer shell in the third deployment device, the two ends of the fourth connecting rod are respectively fixedly connected to the middle rib rod and the rotating shaft in the second deployment device, and the two ends of the fifth connecting rod are respectively fixedly connected to the end rib rod and the rotating shaft in the third deployment device.

[0012] Furthermore, the first parabolic expansion joint also includes a first blocking film, which is fixedly mounted on the first connecting rod, and one end of the first blocking film is slidably connected to the second connecting rod; the second parabolic expansion joint also includes a second blocking film, which is fixedly mounted on the third connecting rod, and both ends of the second blocking film are slidably connected to the fourth connecting rod and the fifth connecting rod respectively.

[0013] Furthermore, the expandable truss also includes a first tightening strap, a first expander clamping device, a second tightening strap and a second expander clamping device, the first tightening strap is arranged opposite to the first expander clamping device, and the second tightening strap is arranged opposite to the second expander clamping device.

[0014] Furthermore, the cylindrical parabolic reflector SAR antenna also includes a phased array feed.

[0015] A satellite comprises an upper deck and a SAR antenna of a columnar parabolic reflector system; the SAR columnar parabolic reflector and a phased array feed are both mounted on the upper deck; a heat dissipation pipe is arranged in the upper deck, and the heat dissipation pipe is used to dissipate heat for the phased array feed.

[0016] Furthermore, the heat dissipation pipe comprises a first longitudinal heat dissipation pipe, a second longitudinal heat dissipation pipe, a third longitudinal heat dissipation pipe and a transverse heat dissipation pipe, and the transverse heat dissipation pipe is connected to the first longitudinal heat dissipation pipe, the second longitudinal heat dissipation pipe and the third longitudinal heat dissipation pipe in sequence.

[0017] The technical solution of the utility model can achieve at least one of the following effects:

[0018] (1) The utility model adopts a cylindrical parabolic reflector system SAR antenna, including a SAR cylindrical parabolic reflector, wherein the SAR cylindrical parabolic reflector includes an expandable truss, wherein the expandable truss includes a plurality of parabolic cylindrical support ribs and a baseline expansion mechanism, wherein the parabolic cylindrical support ribs include a first parabola expansion joint and a second parabola expansion joint, and the baseline expansion mechanism includes a baseline expansion joint, wherein the parabolic cylindrical support ribs can be expanded and locked along the parabola direction through the first parabola expansion joint and the second parabola expansion joint, and the plurality of parabolic cylindrical support ribs can be expanded and locked along the baseline direction through the baseline expansion joint; thus, the SAR cylindrical parabolic reflector antenna can be quickly expanded and locked, and the structure is simple, and no electric energy is required during the expansion and locking process, thereby reducing the electric energy consumption of the satellite.

[0019] (2) The utility model provides a satellite, including an upper deck and a columnar parabolic reflector system SAR antenna; the SAR columnar parabolic reflector and the phased array feed are both mounted on the upper deck; a heat dissipation pipe is arranged on the upper deck, the heat dissipation pipe includes a first longitudinal heat dissipation pipe, a second longitudinal heat dissipation pipe, a third longitudinal heat dissipation pipe and a transverse heat dissipation pipe, the transverse heat dissipation pipe is connected to the first longitudinal heat dissipation pipe, the second longitudinal heat dissipation pipe and the third longitudinal heat dissipation pipe in sequence, and the heat dissipation of the phased array feed can be carried out through the heat dissipation pipe, so that the phased array feed maintains a suitable operating temperature.

[0020] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0022] Figure 1 It is a structural schematic diagram of a cylindrical parabolic reflector SAR antenna and a satellite in a folded state according to an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the unfolded state of the cylindrical parabolic reflector SAR antenna and the satellite of the embodiment of the utility model;

[0024] Figure 3 This is a schematic structural diagram of a deployable truss according to an embodiment of the utility model;

[0025] Figure 4 This is a schematic structural diagram of a parabolic cylindrical support rib according to an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of a first parabola unfolding joint of an embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of a first unfolding device according to an embodiment of the utility model;

[0028] Figure 7 It is a structural schematic diagram of a second parabola unfolding joint of an embodiment of the utility model;

[0029] Figure 8 It is a structural schematic diagram of the baseline unfolding mechanism of an embodiment of the utility model;

[0030] Fig. 9 It is a structural schematic diagram of a phased array feed source according to an embodiment of the utility model;

[0031] Fig.10 It is a schematic structural diagram of a heat dissipation pipe according to an embodiment of the utility model.

[0032] Reference numerals:

[0033] 100-SAR cylindrical parabolic reflector;

[0034] 101- expandable truss; 102- wire mesh; 103- parabolic cylinder support rib; 104- baseline expansion mechanism; 105- root rib rod; 106- middle rib rod; 107- end rib rod; 108- first parabola expansion joint; 109- second parabola expansion joint; 110- first connecting rod; 111- second connecting rod; 112- first expansion device; 113- housing; 114- rotating shaft; 115- scroll spring; 116- lock Tightening groove; 117-elastic pressure plate; 118-locking pin; 119-first blocking film; 120-third connecting rod; 121-fourth connecting rod; 122-fifth connecting rod; 123-second unfolding device; 124-third unfolding device; 125-second blocking film; 126-first connecting beam; 127-second connecting beam; 128-baseline unfolding joint; 129-first tightening strap; 130-second tightening strap; 131-micro switch;

[0035] 200-Phase array feed;

[0036] 201-antenna radiation unit; 202-TR component; 203-delay amplification component; 204-integrated power supply wave control box;

[0037] 300-upper deck;

[0038] 301 - heat dissipation pipe; 302 - first longitudinal heat dissipation pipe; 303 - second longitudinal heat dissipation pipe; 304 - third longitudinal heat dissipation pipe; 305 - transverse heat dissipation pipe. DETAILED DESCRIPTION

[0039] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0040] Example 1

[0041] A specific embodiment of the utility model discloses a cylindrical parabolic reflector system SAR antenna, such as Figure 1 and Figure 2 As shown, the SAR cylindrical parabolic reflector 100 and the phased array feed 200 are included. The SAR cylindrical parabolic reflector 100 includes a deployable truss 101 and a metal wire mesh 102. The deployable truss 101 is installed on the satellite and can be deployed along a parabolic direction (such as Figure 2 B direction in the figure) and the baseline direction (such as Figure 2The metal mesh 102 is mounted on the deployable truss 101 to reflect electromagnetic signals; the metal mesh 102 fits the deployable truss 101 to ensure the accuracy of receiving and sending signals by the SAR cylindrical parabolic reflector 100; when the deployable truss 101 is deployed along the parabola direction and the baseline direction, the metal mesh 102 can be gradually deployed with the deployable truss 101 to form a parabolic cylinder shape.

[0042] Preferably, if Figure 3 As shown, the deployable truss 101 includes a plurality of parabolic support ribs 103 and a baseline deployment mechanism 104. At least one of the plurality of parabolic support ribs 103 is fixedly connected to the satellite, and the remaining parabolic support ribs 103 are connected via the baseline deployment mechanism 104. The parabolic support ribs 103 can be deployed along a parabolic direction, and the baseline deployment mechanism 104 is used to drive the plurality of parabolic support ribs 103 to deploy in a direction away from each other, that is, the deployable truss 101 can be deployed along the parabolic direction and the baseline direction, and the deployable truss 101 after deployment forms a parabolic shape.

[0043] Preferably, if Figure 4 The parabolic cylindrical support rib 103 includes a root rib rod 105, an intermediate rib rod 106, an end rib rod 107, a first parabolic expansion joint 108 and a second parabolic expansion joint 109. The root rib rod 105 and the intermediate rib rod 106 are connected via the first parabolic expansion joint 108, and the intermediate rib rod 106 and the end rib rod 107 are connected via the second parabolic expansion joint 109. The first parabolic expansion joint 108 is used to drive the intermediate rib rod 106 to rotate relative to the root rib rod 105, that is, the intermediate rib rod 106 can be driven to expand via the first parabolic expansion joint 108. The second parabolic expansion joint 109 is used to drive the end rib rod 107 to rotate relative to the intermediate rib rod 106, that is, the end rib rod 107 can be driven to expand via the second parabolic expansion joint 109, thereby realizing the expansion of the parabolic cylindrical support rib 103 along the parabolic direction.

[0044] Preferably, if Figure 5 As shown, the first parabolic deployment joint 108 includes a first connecting rod 110, a second connecting rod 111 and a first deployment device 112, the two ends of the first connecting rod 110 are respectively connected to the root rib rod 105 and the first deployment device 112, the two ends of the second connecting rod 111 are respectively connected to the first deployment device 112 and the middle rib rod 106, the first deployment device 112 is used to drive the second connecting rod 111 to rotate relative to the first connecting rod 110, and lock the second connecting rod 111 rotated into place, so as to realize the automatic deployment of the middle rib rod 106 along the parabolic direction, and automatically lock it after being deployed into place.

[0045] Preferably, if Figure 6 As shown, the first unfolding device 112 includes a shell 113, a rotating shaft 114 and a spiral spring 115, the rotating shaft 114 is passed through the shell 113 and is rotatably connected to the shell 113; the shell 113 is fixedly connected to the second connecting rod 111, and the rotating shaft 114 is fixedly connected to the first connecting rod 110; one end of the spiral spring 115 is fixedly connected to the rotating shaft 114, and the other end is fixedly connected to the shell 113, and the spiral spring 115 is always in a compressed state, and is used to apply elastic tension to the second connecting rod 111, so that the second connecting rod 111 can rotate relative to the first connecting rod 110, so as to drive the middle rib rod 106 to automatically unfold along the parabolic direction.

[0046] Preferably, the first deployment device 112 also includes a locking groove 116, an elastic pressure plate 117 and a locking pin 118, wherein the locking groove 116 is arranged on the second connecting rod 111; the locking pin 118 can be inserted into the locking groove 116, and is used to fix the second connecting rod 111 that has been rotated into place, so that the second connecting rod 111 maintains an unchanged relative position with the first connecting rod 110 after being rotated into place; one end of the elastic pressure plate 117 is fixedly connected to the first connecting rod 110, and the other end is fixedly connected to the locking pin 118, and the elastic pressure plate 117 is used to apply elastic pressure to the locking pin 118, so that the locking pin 118 maintains contact with the second connecting rod 111; when the volute spring 115 drives the second connecting rod 111 to rotate relative to the first connecting rod 110, the locking pin 118 is always in contact with the second connecting rod 110 under the elastic pressure of the elastic pressure plate 117 1 contact, when the locking pin 118 is inserted into the locking groove 116, it means that the second connecting rod 111 has been rotated into place, and the elastic pressure plate 117 can press the locking pin 118 into the locking groove 116 to prevent the locking pin 118 from coming out of the locking groove 116. The second connecting rod 111 that has been deployed into place is fixed by the elastic pressure plate 117, the locking pin 118 and the locking groove 116 cooperating with each other, so that the second connecting rod 111 keeps the relative position with the first connecting rod 110 unchanged after being rotated into place, and the middle rib rod 106 after being deployed is automatically locked, and the positions of the middle rib rod 106 and the root rib rod 105 after being deployed are kept fixed. Compared with the prior art, the first parabola deployment joint 108 has a simple structure, and the middle rib rod 106 can be automatically deployed along the parabola direction without using electric energy, and automatically locked after being deployed into place.

[0047] Preferably, the first parabolic expansion joint 108 also includes a first blocking film 119, which is fixedly mounted on the first connecting rod 110, and one end of which is slidably connected to the second connecting rod 111, and the first blocking film 119 always keeps in contact with the second connecting rod 111, thereby preventing the metal mesh 102 from being rolled into the first expansion device 112 when the middle rib 106 is in a folded state, thereby preventing the metal mesh 102 from being hooked by the first expansion device 112 and damaging the metal mesh 102.

[0048] Preferably, if Figure 7 As shown, the second parabolic expansion joint 109 includes a third link 120, a fourth link 121, a fifth link 122, a second expansion device 123 and a third expansion device 124, the two ends of the third link 120 are respectively connected to the second expansion device 123 and the third expansion device 124, the two ends of the fourth link 121 are respectively connected to the middle rib 106 and the second expansion device 123, the two ends of the fifth link 122 are respectively connected to the third expansion device 124 and the end rib 107, the second expansion device 123 is used to drive the fourth link 121 to rotate relative to the third link 120, and lock the fourth link 121 rotated into place, the third expansion device 124 is used to drive the fifth link 122 to rotate relative to the third link 120, and lock the fifth link 122 rotated into place, so as to realize the automatic expansion of the end rib 107 along the parabolic direction, and automatic locking after expansion into place.

[0049] Preferably, the structures of the second unfolding device 123 and the third unfolding device 124 are the same as that of the first unfolding device 112; compared with the prior art, the second parabolic unfolding joint 109 has a simple structure and can automatically unfold the end rib rod 107 along the parabolic direction without using electrical energy, and automatically lock after unfolding into place.

[0050] Preferably, the second parabolic unfolding joint 109 also includes a second blocking film 125, which is fixedly mounted on the third connecting rod 120, and its two ends are respectively slidably connected to the fourth connecting rod 121 and the fifth connecting rod 122, and the second blocking film 125 always keeps in contact with the fourth connecting rod 121 and the fifth connecting rod 122, thereby preventing the wire mesh 102 from being drawn into the second unfolding device 123 and / or the third unfolding device 124 when the end rib 107 is in the retracted state, thereby preventing the wire mesh 102 from being hooked by the second unfolding device 123 and / or the third unfolding device 124 and damaging the wire mesh 102.

[0051] Preferably, if Figure 8As shown, the baseline deployment mechanism 104 includes a first connecting beam 126, a second connecting beam 127 and a baseline deployment joint 128, one end of the first connecting beam 126 is connected to the parabolic cylindrical support rib 103, and the other end is connected to the baseline deployment joint 128, one end of the second connecting beam 127 is connected to the baseline deployment joint 128, and the other end is connected to another parabolic cylindrical support rib 103, the baseline deployment joint 128 is used to drive the first connecting beam 126 and the second connecting beam 127 to rotate relative to each other, that is, through the baseline deployment joint 128, multiple parabolic cylindrical support ribs 103 can be driven to deploy in a direction away from each other, that is, the deployable truss 101 can be deployed along the baseline direction.

[0052] Preferably, the structure of the baseline deployment joint 128 is the same as that of the second parabola deployment joint 109; compared with the prior art, the baseline deployment joint 128 has a simple structure and can deploy multiple parabolic cylindrical support ribs 103 along the baseline direction without using electrical energy, and automatically lock after being deployed into place.

[0053] Preferably, if Figure 3 The expandable truss 101 further comprises a first tightening strap 129 and a first expander clamping device, wherein the first tightening strap 129 is mounted on the end rib 107, and the first expander clamping device is mounted on the middle rib 106. When the expandable truss 101 is in a folded state, the first tightening strap 129 is fixedly connected to the first expander clamping device, and is used to tighten and fix the folded end rib 107 to prevent the end rib 107 from automatically expanding along a parabolic direction.

[0054] Preferably, the deployable truss 101 also includes a second tightening strap 130 and a second expander clamping device, wherein the second tightening strap 130 is installed on the middle rib rod 106, and the second expander clamping device is installed on the satellite. When the deployable truss 101 is in a folded state, it is used to tighten and fix the folded middle rib rod 106 to prevent the middle rib rod 106 from automatically expanding along the parabolic direction.

[0055] Preferably, the first breaker clamping device and the second breaker clamping device both adopt the memory alloy breaker clamping device in the prior art.

[0056] Preferably, the first unfolding device 112 also includes a micro switch 131, and the micro switch 131 is installed on the first connecting rod 110. The micro switch 131 is used to feedback a signal to the satellite controller that the middle rib 106 is fully unfolded when the locking pin 118 is inserted into the locking groove 116. After receiving the signal, the controller controls the first expander clamping device to disconnect from the first tightening strap 129, so that the second parabolic unfolding joint 109 drives the end rib 107 to automatically unfold along the parabolic direction, and automatically locks the end rib 107 after unfolding. At the same time, the baseline unfolding mechanism 104 drives multiple parabolic cylindrical support ribs 103 to automatically unfold along the baseline direction, and automatically locks the parabolic cylindrical support ribs 103 after unfolding. That is, the expandable truss 101 is simultaneously unfolded along the parabolic direction and the baseline direction, thereby improving the unfolding efficiency.

[0057] Preferably, if Fig. 9 As shown, the phased array feed 200 includes an antenna radiating unit 201, a TR component 202, a delay amplifying component 203 and an integrated power wave control box 204 connected in sequence. The antenna radiating unit 201, the TR component 202, the delay amplifying component 203 and the integrated power wave control box 204 are all provided in plurality, and the plurality of antenna radiating units 201 are arranged linearly; the plurality of TR components 202 are arranged linearly and arranged relative to the antenna radiating unit 201; the plurality of delay amplifying components 203 are arranged linearly and arranged relative to the TR component 202; the plurality of integrated power wave control boxes 204 are arranged linearly and arranged relative to the delay amplifying component 203; the antenna radiating unit 201, the TR component 202, the delay amplifying component 203 and the integrated power wave control box 204 are all existing equipment.

[0058] Example 2

[0059] Embodiment 2 provides a satellite, comprising an upper deck 300 and the cylindrical parabolic reflector system SAR antenna described in Embodiment 1; the phased array feed 200 is fixedly mounted on the upper deck 300, and the SAR cylindrical parabolic reflector 100 is fixedly mounted on the upper deck 300.

[0060] Preferably, a heat dissipation pipe 301 is provided in the upper deck 300 , and the heat dissipation pipe 301 is connected to other external heat dissipation mechanisms for dissipating heat from the phased array feed source 200 , so that the phased array feed source 200 maintains a suitable operating temperature.

[0061] Preferably, in order to accurately dissipate heat for the phased array feed 200, Fig.10As shown, the heat dissipation pipe 301 includes a first longitudinal heat dissipation pipe 302, a second longitudinal heat dissipation pipe 303 and a third longitudinal heat dissipation pipe 304. The first longitudinal heat dissipation pipe 301 is arranged in the installation area of ​​the TR component 202, and is used to dissipate heat for the antenna radiation unit 201 and the TR component 202; the second longitudinal heat dissipation pipe 303 is arranged in the installation area of ​​the delay amplifier component 203, and is used to dissipate heat for the delay amplifier component 203; the third longitudinal heat dissipation pipe 304 is arranged in the installation area of ​​the integrated power supply wave control box 204, and is used to dissipate heat for the integrated power supply wave control box 204.

[0062] Preferably, since the heat generated by the antenna radiation unit 201 and the TR component 202 during operation is greater than the heat generated by the delay amplifier component 203 and the integrated power wave control box 204 during operation, in order to speed up the heat dissipation of the antenna radiation unit 201 and the TR component 202, the heat dissipation pipe 301 also includes a transverse heat dissipation pipe 305, and the transverse heat dissipation pipe 305 is connected to the first longitudinal heat dissipation pipe 302, the second longitudinal heat dissipation pipe 303 and the third longitudinal heat dissipation pipe 304 in sequence, and can be used to transfer the heat in the first longitudinal heat dissipation pipe 302 to the second longitudinal heat dissipation pipe 303 and the third longitudinal heat dissipation pipe 304, thereby realizing rapid heat dissipation of the antenna radiation unit 201 and the TR component 202; a plurality of transverse heat dissipation pipes 305 are provided.

[0063] Preferably, the first longitudinal heat dissipation tube 302 is filled with a phase change material, so as to achieve thermal insulation of the antenna radiation unit 201 and the TR component 202 .

[0064] Preferably, a heater is further provided in the first longitudinal heat dissipation tube 302, and the operating temperature of the antenna radiation unit 201 and the TR component 202 can be adjusted by the heater to improve the working stability of the antenna radiation unit 201 and the TR component 202; the threshold value of the temperature control of the first longitudinal heat dissipation tube 302 by the heater is -10°C to -9°C.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A cylindrical parabolic reflector SAR antenna, characterized in that: The SAR columnar parabolic reflector (100) comprises a deployable truss (101), the deployable truss (101) comprises a plurality of parabolic cylindrical support ribs (103), and the parabolic cylindrical support ribs (103) comprise a first parabolic deployment joint (108); The first parabolic expansion joint (108) includes a first expansion device (112), which includes a housing (113), a rotating shaft (114), a scroll spring (115), a locking groove (116), an elastic pressure plate (117) and a locking pin (118), wherein the locking pin (118) can be inserted into the locking groove (116); the rotating shaft (114) is rotatably connected to the housing (113); one end of the scroll spring (115) is fixedly connected to the rotating shaft (114), and the other end is fixedly connected to the housing (113), and the scroll spring (115) is used to drive the housing (113) to rotate; the elastic pressure plate (117) is fixedly connected to the locking pin (118), and the elastic pressure plate (117) is used to press the locking pin (118) into the locking groove (116).

2. The cylindrical parabolic reflector SAR antenna according to claim 1, characterized in that: The parabolic cylindrical support rib (103) further comprises a second parabolic expansion joint (109), the second parabolic expansion joint (109) comprises a third connecting rod (120) and a second expansion device (123) and a third expansion device (124) arranged at two ends of the third connecting rod (120), the structures of the second expansion device (123) and the third expansion device (124) are the same as the structure of the first expansion device (112); the expandable truss (101) further comprises a baseline expansion mechanism (104), the baseline expansion mechanism (104) is used to drive multiple parabolic cylindrical support ribs (103) to expand along a baseline direction; the baseline expansion mechanism (104) comprises a baseline expansion joint (128), the baseline expansion joint (128) has the same structure as the second parabolic expansion joint (109).

3. The cylindrical parabolic reflector SAR antenna according to claim 2, characterized in that: The parabolic cylindrical support rib (103) further comprises a root rib bar (105), an intermediate rib bar (106) and an end rib bar (107); the root rib bar (105) and the intermediate rib bar (106) are connected via a first parabolic expansion joint (108); and the intermediate rib bar (106) and the end rib bar (107) are connected via a second parabolic expansion joint (109).

4. The cylindrical parabolic reflector SAR antenna according to claim 3, characterized in that: The first parabolic deployment joint (108) further comprises a first connecting rod (110) and a second connecting rod (111), wherein two ends of the first connecting rod (110) are respectively fixedly connected to the root rib rod (105) and the rotating shaft (114) in the first deployment device (112), and two ends of the second connecting rod (111) are respectively fixedly connected to the outer shell (113) and the middle rib rod (106) in the first deployment device (112).

5. The cylindrical parabolic reflector SAR antenna according to claim 4, characterized in that: The second parabolic expansion joint (109) further comprises a fourth connecting rod (121) and a fifth connecting rod (122); the two ends of the third connecting rod (120) are respectively fixedly connected to the outer shell (113) in the second expansion device (123) and the outer shell (113) in the third expansion device (124); the two ends of the fourth connecting rod (121) are respectively fixedly connected to the middle rib rod (106) and the rotating shaft (114) in the second expansion device (123); the two ends of the fifth connecting rod (122) are respectively fixedly connected to the end rib rod (107) and the rotating shaft (114) in the third expansion device (124).

6. The cylindrical parabolic reflector SAR antenna according to claim 5, characterized in that: The first parabola expansion joint (108) further comprises a first blocking film (119), wherein the first blocking film (119) is fixedly mounted on the first connecting rod (110), and one end of the first blocking film (119) is slidably connected to the second connecting rod (111); the second parabola expansion joint (109) further comprises a second blocking film (125), wherein the second blocking film (125) is fixedly mounted on the third connecting rod (120), and two ends of the second blocking film (125) are slidably connected to the fourth connecting rod (121) and the fifth connecting rod (122), respectively.

7. The cylindrical parabolic reflector SAR antenna according to claim 6, characterized in that: The expandable truss (101) further comprises a first tightening strap (129), a first expander clamping device, a second tightening strap (130) and a second expander clamping device, wherein the first tightening strap (129) is arranged opposite to the first expander clamping device, and the second tightening strap (130) is arranged opposite to the second expander clamping device.

8. A cylindrical parabolic reflector SAR antenna according to any one of claims 1 to 7, characterized in that: Also included is a phased array feed (200).

9. A satellite, characterized in that: The invention comprises an upper deck (300) and a SAR antenna of a cylindrical parabolic reflector system as claimed in any one of claims 1 to 8; the SAR cylindrical parabolic reflector (100) and the phased array feed (200) are both mounted on the upper deck (300); a heat dissipation pipe (301) is provided in the upper deck (300), and the heat dissipation pipe (301) is used to dissipate heat from the phased array feed (200).

10. A satellite according to claim 9, characterized in that: The heat dissipation pipe (301) comprises a first longitudinal heat dissipation pipe (302), a second longitudinal heat dissipation pipe (303), a third longitudinal heat dissipation pipe (304) and a transverse heat dissipation pipe (305), and the transverse heat dissipation pipe (305) is sequentially connected to the first longitudinal heat dissipation pipe (302), the second longitudinal heat dissipation pipe (303) and the third longitudinal heat dissipation pipe (304).

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