Vehicle-mounted test tool for SAR (Synthetic Aperture Radar) radar antenna

Abstract

The utility model provides a vehicle-mounted test tool for an SAR (synthetic aperture radar) antenna, which comprises a test tool assembly, the SAR antenna is mounted on the test tool assembly, and the test tool assembly is fixedly mounted in a pickup truck box. The tool has the advantages that the SAR antenna sub-array can be fixedly installed on the pickup truck box, the antenna extends laterally at a certain angle, the tool has enough rigidity and strength, and the requirement for the stability in the driving process of the pickup truck is met; the test tool has an angle adjustable function, can adjust the installation angle of the SAR radar antenna sub-array, and is used for testing the performance of the SAR radar antenna sub-array at different angles. The test adopts a pure mechanical design, and has the advantages of simplicity in assembly and easiness in angle adjustment.

Description

Technical Field

[0001] The utility model belongs to the field of on-vehicle testing of antennas, and in particular relates to a tooling for on-vehicle testing of SAR radar antennas. Background Technique

[0002] Spaceborne SAR radar antennas are SAR radar phased array antennas used on synthetic aperture radar systems (abbreviated as spaceborne SAR) carried on small satellite platforms. Spaceborne SAR mainly consists of a central electronic device (DCU), a SAR radar antenna, connecting cables, etc. Since there are no means and capabilities to debug and modify the software and hardware of the SAR payload after the SAR satellite is launched into orbit, and there are also certain uncertainties during the satellite launch process, during ground testing, it is necessary to comprehensively evaluate the various test indicators of the spaceborne SAR payload system.

[0003] For ground testing, there are currently two main means. One is to carry out testing using a signal simulator, and the other is to carry out uniform linear motion in the form of being carried by a car or an airplane, and receive and transmit signals during the motion to simulate the ground imaging during the satellite's on-orbit flight for testing. When the spaceborne SAR payload is tested on the ground, it is necessary to carry it by a car to verify its performance indicators on the ground. The current on-vehicle testing tooling has problems such as insufficient stiffness and strength, inability to meet the stability requirements during the driving of a pickup truck, inability to conveniently test the performance of the SAR radar antenna subarray at different angles, and difficulty in assembly. Content of the Utility Model

[0004] In view of this, the utility model aims to propose a tooling for on-vehicle testing of SAR radar antennas to solve at least one problem existing in the prior art.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A tooling for on-vehicle testing of SAR radar antennas, including a testing tooling component. The SAR radar antenna is installed on the testing tooling component, and the testing tooling component is fixedly installed in the pickup truck box.

[0007] The testing tooling component includes eight fixing frames, a fixing bottom plate, a main bracket, two groups of ball head tie rod assemblies, an electric push rod assembly, and an antenna support assembly. The bottom of the main bracket is installed with the fixing bottom plate. The bottom of the fixing bottom plate is installed on the bottom of the pickup truck box through eight fixing frames, and the eight fixing frames are symmetrically arranged in pairs. One side of the top of the main bracket is installed on the antenna support assembly through two groups of ball head tie rod assemblies and the electric push rod assembly. One side of the antenna support assembly is installed with the SAR radar antenna.

[0008] Further, eight openings are provided inside the pickup truck box, and the openings are used to install and fix the bottom plate. Two load-bearing beams are also installed below the pickup truck box, and the load-bearing beams are used to dock with the fixing frame.

[0009] Further, the fixing frame is made of steel plate. The C-shaped groove on the fixing frame is used to clamp the load-bearing beam of the pickup truck box. The fixed bottom plate is a rectangular steel plate structure, and eight first slot holes matching the openings are provided on the surface of the fixed bottom plate.

[0010] Further, a plurality of second slot holes for connecting with the fixed bottom plate are respectively provided at the bottom of the main support. A first threaded interface for connecting with the electric push rod assembly is provided in the middle of one side of the main support. Two second threaded interfaces for connecting with the antenna support assembly are respectively provided at both ends of one side of the main support, and the two second threaded interfaces are symmetrically distributed. Two third threaded interfaces for connecting with the ball head tie rod assembly are also respectively provided at both ends of one side of the main support, and the two third threaded interfaces are symmetrically distributed.

[0011] Further, the ball head tie rod assembly includes a ball head tie rod, a first rotatable support and a second rotatable support. The first rotatable support and the second rotatable support are respectively installed at both ends of the ball head tie rod. The first rotatable support is connected to the third threaded interface on the main support, and the first rotatable support is connected to the antenna support assembly.

[0012] Further, the electric push rod assembly includes a worm and gear push rod, a third rotatable support and a fourth rotatable support. The third rotatable support and the fourth rotatable support are respectively installed at both ends of the worm and gear push rod. The third rotatable support is connected to the antenna support assembly, and the fourth rotatable support is connected to the first threaded interface on the main support.

[0013] Further, the antenna support assembly includes an antenna support, two auxiliary supports, two groups of mounting hinge pairs, an IMU support and an antenna connection column. One auxiliary support is respectively installed on both sides of the antenna support. The bottom of the antenna support is installed on the main support through two groups of mounting hinge pairs. An IMU support is installed on one side of the top of the antenna support. A number of antenna connection columns are installed on the surface of the antenna support, and the antenna connection columns are used for connecting the SAR radar antenna and the antenna support.

[0014] Further, four symmetrically distributed fourth threaded interfaces for connecting with the ball head tie rod assembly are installed on the surface of the antenna support. A fifth threaded interface for connecting with the electric push rod assembly is installed in the middle of the antenna support. A number of through holes for connecting with the antenna connection columns are also provided on the surface of the antenna support. Two groups of sixth threaded interfaces for connecting with the auxiliary supports are symmetrically installed on both sides of the antenna support respectively.

[0015] Further, the installation hinge pair includes a moving hinge, a rotating shaft and a fixed hinge. The moving hinge is connected to the fixed hinge through the rotating shaft. The moving hinge is installed on the antenna bracket, and the fixed hinge is installed on the main bracket.

[0016] Further, one side of the antenna connecting column is a screw rod for connecting with the SAR radar antenna, and the other side of the antenna connecting column is a threaded hole for connecting with the antenna bracket.

[0017] Compared with the prior art, the vehicle-mounted test tooling for the SAR radar antenna of the present utility model has the following advantages:

[0018] The vehicle-mounted test tooling for the SAR radar antenna of the present utility model can install and fix the SAR radar antenna sub-array on the pickup truck box, make the antenna extend laterally at a certain angle, and the tooling has sufficient stiffness and strength to meet the stability requirements during the driving of the pickup truck; this test tooling has an angle adjustable function and can adjust the installation angle of the SAR radar antenna sub-array to test the performance of the SAR radar antenna sub-array at different angles; this test also adopts a pure mechanical design and has the advantages of simple assembly and easy angle adjustment. Description of the Drawings

[0019] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 is the schematic diagram of the overall structure according to the embodiment of the present utility model;

[0021] Figure 2 is the schematic diagram of the test tooling assembly according to the embodiment of the present utility model;

[0022] Figure 3 is the top view schematic diagram of the pickup truck box according to the embodiment of the present utility model;

[0023] Figure 4 is the side view schematic diagram of the pickup truck box according to the embodiment of the present utility model;

[0024] Figure 5 is the schematic diagram of the fixed bottom plate according to the embodiment of the present utility model;

[0025] Figure 6 is the schematic diagram of the fixing frame according to the embodiment of the present utility model;

[0026] Figure 7 is the top view schematic diagram of the overall structure according to the embodiment of the present utility model;

[0027] Figure 8Front partial schematic view of the overall structure according to an embodiment of the present utility model;

[0028] Figure 9 Schematic view of the main bracket according to an embodiment of the present utility model;

[0029] Figure 10 Another perspective schematic view of the main bracket according to an embodiment of the present utility model;

[0030] Figure 11 Schematic view of the ball head tie rod assembly according to an embodiment of the present utility model;

[0031] Figure 12 Schematic view of the electric push rod assembly according to an embodiment of the present utility model;

[0032] Figure 13 Schematic view of the antenna support assembly according to an embodiment of the present utility model;

[0033] Figure 14 Schematic view of the antenna support according to an embodiment of the present utility model;

[0034] Figure 15 Schematic view of the mounting hinge pair according to an embodiment of the present utility model;

[0035] Figure 16 Schematic view of the antenna connection post according to an embodiment of the present utility model.

[0036] Explanation of reference numerals:

[0037] 1, pickup truck box; 11, opening; 12, load-bearing beam; 2, test tooling assembly; 21, fixing frame; 22, fixing base plate; 23, main bracket; 231, second slot; 232, first threaded interface; 233, second threaded interface; 234, third threaded interface; 24, ball head tie rod assembly; 241, ball head tie rod; 242, first rotatable support; 243, second rotatable support; 25, electric push rod assembly; 251, worm and gear push rod; 252, third rotatable support; 253, fourth rotatable support; 26, antenna support assembly; 261, antenna support; 2611, fourth threaded interface; 2612, fifth threaded interface; 2613, through hole; 2614, sixth threaded interface; 262, auxiliary support; 263, mounting hinge pair; 2631, moving hinge; 2632, rotating shaft; 2633, fixed hinge; 264, IMU support; 265, antenna connection post; 3, SAR radar antenna. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0040] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0041] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0042] As Figure 1 shown, a vehicle-mounted test tooling for a SAR radar antenna includes a test tooling assembly 2, and the SAR radar antenna 3 is installed on the test tooling assembly 2. The test tooling assembly 2 is fixedly installed in the pickup truck box 1. The SAR radar antenna 3 maintains a certain angle with the ground. The test tooling assembly 2 is designed with an adjustable angle and can change the angle between the SAR radar antenna 3 and the ground. The SAR radar antenna 3 extends out of the pickup truck box 1 so that the antenna field of view is not blocked.

[0043] As Figure 2As shown in the figure, the test tooling assembly 2 consists of eight fixing brackets 21, a fixing base plate 22, a main bracket 23, two sets of ball joint tie rod assemblies 24, an electric push rod assembly 25, and an antenna bracket assembly 26. It is difficult to directly install the main bracket 23 into the pickup truck box 1. Considering the change of the test interface for subsequent models, the main bracket 23 is indirectly installed into the pickup truck box 1 through a fixing base plate 22. In this way, when the shape / interface of the main bracket 23 changes later, only the holes need to be drilled on the fixing base plate 22. The ball joint tie rod assembly 24 and the worm and gear push rod assembly 25 have variable lengths. By changing the lengths, the installation angle of the antenna bracket assembly 26 on the main bracket 23 can be adjusted, so as to adjust the included angle between the SAR radar antenna 3 and the horizontal plane.

[0044] Figure 3-4 As shown in the figure is the pickup truck box 1. The model is a common pickup truck. There are 8 φ20 openings 11 inside the pickup truck box 1 for butt joint installation with the fixing base plate 22; there are two rectangular load-bearing beams 12 on the lower side of the pickup truck box 1 for butt joint with the fixing brackets 21. The openings 11 are opened beside the load-bearing beams 12.

[0045] Figure 5-6 Schematic diagrams of the fixing bracket 21 and the fixing base plate 22 are shown. The fixing bracket 21 is a sheet metal part made of steel plate, with gussets welded inside to strengthen the overall stiffness. The first slot hole on the fixing bracket 21 is used to cooperate with the opening 11 on the pickup truck box 1 to install screws, and the C-shaped slot on the fixing bracket 21 is used to clamp the load-bearing beam 12 on the pickup truck box 1. The fixing base plate 22 is a thick steel plate with a relatively large weight. There are 8 groups of first slot holes on the thick steel plate for cooperating with the openings 11 on the pickup truck box 1 to install screws, and there are multiple threaded holes on the thick steel plate for installing the main bracket 23.

[0046] Figure 7-8 A detailed schematic diagram of installing the fixing bracket 21 and the fixing base plate 22 onto the pickup truck box 1 is shown. The C-shaped slot on the fixing bracket 21 clamps the load-bearing beam 12 on the pickup truck box 1. Eight M16 long screws are sequentially passed through the first slot holes on the fixing base plate 22, the φ20 openings 11 inside the pickup truck box 1, and the opening 11 on the fixing bracket 21 and then locked with nuts, which can firmly fix the fixing base plate 22 to the pickup truck box 1. Then the main bracket 23 is installed onto the fixing base plate 22 through multiple screws.

[0047] Figure 9-10Shown is the main bracket 23. The main body of the main bracket 21 is made of Q235 steel pipe with a cross-section of 40×40×2.5 mm and steel plates with thicknesses of 5 mm, 10 mm, and 12 mm welded together. Through holes, threaded holes and other external interfaces are arranged thereon. The external interfaces mainly include: a plurality of second slot holes 231 connected to the fixed base plate 22, a first threaded interface 232 connected to the electric push rod assembly 25, two second threaded interfaces 233 connected to the antenna bracket assembly 26 symmetrically distributed, and two third threaded interfaces 234 connected to the ball head pull rod assembly 24 symmetrically distributed.

[0048] Figure 11-12 They are the ball head pull rod assembly 24 and the electric push rod assembly 25. The ball head pull rod assembly 24 mainly includes a ball head pull rod 241 in the middle and first rotatable supports 242 and second rotatable supports 243 at both ends. The ball head pull rod 241 is a standard part, and the distance between the interfaces at both ends can be changed by rotating the external hexagonal part in the middle, playing the role of connecting and transmitting force. The first rotatable support 242 is connected to the third threaded interface 234 on the main bracket 23, and the first rotatable support 242 is connected to the antenna bracket assembly 26. The electric push rod assembly 25 mainly includes a worm and gear push rod 251 and third rotatable supports 252 and fourth rotatable supports 253 at both ends. The worm and gear push rod 251 is a standard part. By driving with a motor, the length of the internal push rod can be changed, thereby changing the distance between the interfaces at both ends of the worm and gear push rod 22, and providing a large bearing capacity. The third rotatable support 252 is connected to the antenna bracket assembly 26, and the fourth rotatable support 253 is connected to the first threaded interface 232 on the main bracket 23. The cooperation of the electric push rod assembly 25 and the ball head pull rod assembly 24 can play the role of changing the angle between the antenna bracket assembly 26 and the main bracket 23, and the electric push rod assembly 25 in the middle and the ball head pull rod assemblies 24 on both sides together make the test tooling assembly 2 have high strength, stiffness, and maintain accuracy.

[0049] Figure 13 They are the antenna bracket assembly 26. It mainly includes an antenna bracket 261, two auxiliary brackets 262, two groups of mounting hinge pairs 263, an IMU bracket 264, and an antenna connection column 265. The two auxiliary brackets 262 are used for the handling and transfer of the entire assembly. The two groups of mounting hinge pairs 263 are used for the connection and rotation between the antenna bracket 261 and the main bracket 23. The antenna connection column 265 is used for the connection between the SAR radar antenna 3 and the antenna bracket 261.

[0050] Figure 14It is the antenna support 261. The main body is made of Q235 steel pipe with a cross-section of 25×25×2 mm and steel plates with thicknesses of 4 mm, 8 mm, and 10 mm welded together. The antenna support takes into account universality and has multiple external interfaces such as through holes and threaded holes on it. The main interfaces include: four groups of symmetrically distributed fourth threaded interfaces 2611 connected to the ball head tie rod assembly 24, fifth threaded interfaces 2612 connected to the electric push rod assembly 25, through holes 2613 connected to the antenna connection column 265, and four groups of symmetrically distributed sixth threaded interfaces 2614 connected to the auxiliary support 262.

[0051] Figure 15 It is the mounting hinge pair 263. It mainly includes a moving hinge 2631, a rotating shaft 2632, and a fixed hinge 2633. Among them, the moving hinge 2631 is installed on the antenna support 261, and the fixed hinge 2633 is installed on the main support 23. Two groups of mounting hinge pairs 263 are used for the connection and rotation between the antenna support 261 and the main support 23.

[0052] Figure 16 It is the antenna connection column 265. One side of the antenna connection column 265 has a screw feature and is connected to the SAR radar antenna 3, and the other side has a threaded hole feature and is connected to the antenna support 261. The middle part has a circular column feature with a notch to facilitate tool operation. The antenna connection column 265 serves to mount the SAR radar antenna 3 onto the antenna support 261.

[0053] This test tooling can install and fix the SAR radar antenna sub-array onto the pickup truck bed, making the antenna extend laterally at a certain angle, and the tooling has sufficient stiffness and strength to meet the stability requirements during the driving of the pickup truck; this test tooling has an angle adjustable function and can adjust the installation angle of the SAR radar antenna sub-array to test the performance of the SAR radar antenna sub-array at different angles; this test also adopts a pure mechanical design and has the advantages of simple assembly and easy angle adjustment.

[0054] The working principle of a test tooling for on-vehicle testing of SAR radar antennas:

[0055] In the first step, fix the fixed bottom plate 22 to the pickup truck box 1 through the fixing bracket 21 and M16 screws; in the second step, fix the main bracket 23 to the bottom plate 22 through screws; in the third step, connect one end of the ball joint rod assembly 24 and the electric push rod assembly 25 to the corresponding interfaces of the main bracket 23; in the fourth step, since the SAR radar antenna 3 is heavy, the SAR radar antenna 3 needs to be installed on the antenna bracket assembly 26 through the antenna connection column 265 at the ground end, and the mounting hinge pair 263 and two auxiliary brackets 262 are installed on the antenna bracket assembly 26 together; in the fifth step, manually operate the auxiliary bracket 262 to lift the antenna bracket assembly 26 to the corresponding position of the fixing bracket 21, connect the mounting hinge pair 263, then connect the other end of the electric push rod assembly 25 to the antenna bracket assembly 26, adjust the electric push rod assembly 25 to change the included angle between the antenna bracket assembly 26 and the main bracket 23. After the angle adjustment is in place, adjust the two ball joint rod assemblies 24 to an appropriate length and connect them to the antenna bracket assembly 26, and then finely adjust the ball joint rod 24 to make it have a certain pre-tightening force. Thus, the assembly and adjustment of the entire test tooling are completed, and the vehicle flight test can be carried out subsequently.

[0056] This test tooling is applicable to the test of the SAR radar antenna sub-array. This tooling can install and fix the SAR radar antenna sub-array to the pickup truck box, make the antenna extend laterally at a certain angle, and the tooling has sufficient stiffness and strength to meet the stability requirements during the driving of the pickup truck; this tooling has an angle adjustable function, which can adjust the installation angle of the SAR radar antenna sub-array to test the performance of the SAR radar antenna sub-array at different angles; and it adopts a pure mechanical design, having the advantages of simple assembly and easy angle adjustment.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted test tool for SAR radar antenna, characterized by: It comprises a test fixture assembly (2), a SAR radar antenna (3) is mounted on the test fixture assembly (2), and the test fixture assembly (2) is fixedly mounted in a pickup truck box (1); The test fixture assembly (2) includes eight fixing frames (21), a fixed base plate (22), a main bracket (23), two sets of ball head pull rod assemblies (24), an electric push rod assembly (25) and an antenna bracket assembly (26); the fixed base plate (22) is installed at the bottom of the main bracket (23); the bottom of the fixed base plate (22) is installed to the bottom of the pickup truck box (1) through eight fixing frames (21), and the eight fixing frames (21) are symmetrically arranged in pairs; one side of the top of the main bracket (23) is installed to the antenna bracket assembly (26) through two sets of ball head pull rod assemblies (24) and an electric push rod assembly (25); and a SAR radar antenna (3) is installed on one side of the antenna bracket assembly (26).

2. The vehicle-mounted test fixture for SAR radar antenna according to claim 1, characterized in that: The pickup truck box (1) has eight openings (11) inside, and the openings (11) are used to install a fixed bottom plate (22). Two load-bearing beams (12) are also installed below the pickup truck box (1), and the load-bearing beams (12) are used to dock with the fixing frame (21).

3. The vehicle-mounted test fixture for SAR radar antenna according to claim 2, characterized in that: The fixing frame (21) is made of steel plate. The C-shaped groove on the fixing frame (21) is used to clamp the load-bearing beam (12) of the pickup truck box (1). The fixing base plate (22) is a rectangular steel plate structure. The surface of the fixing base plate (22) is provided with eight first slot holes that match the opening (11).

4. The vehicle-mounted test fixture for SAR radar antenna according to claim 1, characterized in that: The bottom of the main bracket (23) is respectively provided with a plurality of second slots (231) connected to the fixed base plate (22); a first threaded interface (232) connected to the electric push rod assembly (25) is provided in the middle of one side of the main bracket (23); two second threaded interfaces (233) connected to the antenna bracket assembly (26) are respectively provided at both ends of one side of the main bracket (23); the two second threaded interfaces (233) are symmetrically distributed; two third threaded interfaces (234) connected to the ball head pull rod assembly (24) are also respectively provided at both ends of one side of the main bracket (23); the two third threaded interfaces (234) are symmetrically distributed.

5. The vehicle-mounted test fixture for SAR radar antenna according to claim 4, characterized in that: The ball head pull rod assembly (24) includes a ball head pull rod (241), a first rotatable support (242) and a second rotatable support (243); the first rotatable support (242) and the second rotatable support (243) are respectively installed at both ends of the ball head pull rod (241); the first rotatable support (242) is connected to the third threaded interface (234) on the main support (23); and the first rotatable support (242) is connected to the antenna support assembly (26).

6. The vehicle-mounted test fixture for SAR radar antenna according to claim 4, characterized in that: The electric push rod assembly (25) comprises a worm gear push rod (251), a third rotatable support (252) and a fourth rotatable support (253); the third rotatable support (252) and the fourth rotatable support (253) are respectively mounted at two ends of the worm gear push rod (251); the third rotatable support (252) and the fourth rotatable support (253) are connected to the antenna support assembly (26); and the fourth rotatable support (253) is connected to the first threaded interface (232) on the main support (23).

7. The vehicle-mounted test fixture for SAR radar antenna according to claim 1, characterized in that: The antenna bracket assembly (26) comprises an antenna bracket (261), two auxiliary brackets (262), two sets of mounting hinge pairs (263), an IMU bracket (264) and an antenna connecting column (265), wherein an auxiliary bracket (262) is respectively mounted on both sides of the antenna bracket (261), the bottom of the antenna bracket (261) is mounted to the main bracket (23) through two sets of mounting hinge pairs (263), the IMU bracket (264) is mounted on one side of the top of the antenna bracket (261), and a plurality of antenna connecting columns (265) are mounted on the surface of the antenna bracket (261), and the antenna connecting columns (265) are used to connect the SAR radar antenna (3) and the antenna bracket (261).

8. The vehicle-mounted test fixture for SAR radar antenna according to claim 7, characterized in that: The surface of the antenna bracket (261) is provided with four symmetrically distributed fourth threaded interfaces (2611) connected to the ball head pull rod assembly (24); the middle of the antenna bracket (261) is provided with a fifth threaded interface (2612) connected to the electric push rod assembly (25); the surface of the antenna bracket (261) is also provided with a plurality of through holes (2613) connected to the antenna connecting column (265); and two groups of sixth threaded interfaces (2614) connected to the auxiliary bracket (262) are symmetrically installed on both sides of the antenna bracket (261).

9. The vehicle-mounted test fixture for SAR radar antenna according to claim 7, characterized in that: The mounting hinge pair (263) comprises a movable hinge (2631), a rotating shaft (2632) and a fixed hinge (2633), wherein the movable hinge (2631) is connected to the fixed hinge (2633) via the rotating shaft (2632), the movable hinge (2631) is mounted to the antenna bracket (261), and the fixed hinge (2633) is mounted to the main bracket (23).

10. The vehicle-mounted test fixture for SAR radar antenna according to claim 7, characterized in that: One side of the antenna connection column (265) is a screw rod, which is used to connect to the SAR radar antenna (3), and the other side of the antenna connection column (265) is a threaded hole, which is used to connect to the antenna bracket (261).

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