Antenna connecting bracket for airborne test of SAR (Synthetic Aperture Radar) radar antenna
By designing an antenna connection bracket for SAR radar antenna, including the main connection bracket, antenna connection bracket, reinforcement plate and reinforcement bracket, the problem of insufficient stiffness and strength of the antenna connection bracket in the prior art is solved, and the SAR radar antenna is stable and fixed angle in the test is achieved, meeting the requirements of accurate test performance.
Patent Information
- Application Number
- CN202421883563.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-08-06
AI Technical Summary
The existing antenna airborne test fixed angle tooling has insufficient stiffness and strength, resulting in the angle being unable to be stable within the set experimental value, and the performance of SAR radar antenna cannot be accurately tested.
An antenna connection bracket including a main connection bracket, an antenna connection bracket, a reinforcement plate and a reinforcement bracket are designed. Through the combination of these components, the stiffness and strength of the bracket are enhanced to ensure that the SAR radar antenna can be securely fixed at a set angle.
By enhancing the stiffness and strength of the bracket, it can assist the antenna on-board test fixed angle tooling to maintain a fixed angle between the SAR radar antenna and the horizontal plane, thus meeting the requirements for accurately testing the performance of SAR radar antennas.
Smart Images
Figure CN222839019U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of antenna airborne testing, in particular to an antenna connecting bracket used for SAR radar antenna airborne testing. Background Art
[0002] The spaceborne SAR radar antenna is a SAR radar phased array antenna used in synthetic aperture radar systems (referred to as spaceborne SAR) on small satellite platforms. Spaceborne SAR is mainly composed of central electronic equipment (DCU), SAR radar antenna and connecting cables. After the SAR satellite is launched into orbit, the SAR payload software and hardware do not have the means and ability to be debugged and modified again, and there are certain uncertainties in the satellite launch process. Therefore, during ground testing, the various test indicators of the spaceborne SAR payload system must be comprehensively evaluated.
[0003] At present, when testing SAR radar antennas, it is necessary to use an antenna airborne test fixed angle fixture to fix the angle of the SAR radar antenna. However, the current antenna airborne test fixed angle fixture has weak antenna connection bracket stiffness and strength, which makes it impossible to stabilize the angle within the set experimental value, and thus there is a problem of being unable to accurately test the performance requirements of the SAR radar antenna. Utility Model Content
[0004] In view of this, the utility model aims to provide an antenna connection bracket for airborne testing of SAR radar antennas, so as to solve at least one problem existing in the above-mentioned prior art.
[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:
[0006] An antenna connection bracket for airborne testing of SAR radar antennas comprises two main connection brackets, two antenna connection brackets, two reinforcement plates and a reinforcement bracket, wherein the two antenna connection brackets are symmetrically arranged, the middle parts of the two antenna connection brackets are connected by a reinforcement bracket, two main connection brackets are respectively installed at both ends above the two antenna connection brackets, the two ends of each main connection bracket are respectively installed to an antenna connection bracket, and a reinforcement plate is also respectively installed on one side of each main connection bracket.
[0007] Furthermore, the main connection bracket includes a main connection body, and three groups of first through hole interfaces are provided on the surface of the main connection body, and the first through hole interface is used to dock with the mounting bracket of the aircraft load compartment. A mounting boss is provided at each end of the main connection body, and each mounting boss is provided with a plurality of second through hole interfaces, and the second through hole interfaces are used to connect to the antenna connection frame. A group of first threaded hole interfaces is provided in the middle of the main connection body, and the first threaded hole interface is used to be screwed to the reinforcement plate.
[0008] Further, each group of the first through hole interfaces includes 4 through holes respectively.
[0009] Furthermore, the antenna connecting frame is a triangular configuration, the long right-angled side of the triangular configuration is connected to the main connecting bracket, the hypotenuse of the triangular configuration is connected to the SAR radar antenna, the long right-angled side of the triangular configuration is provided with two groups of bosses, each boss is respectively provided with a group of second threaded hole interfaces connected to the main connecting bracket; each boss is also provided with a group of fourth threaded hole interfaces connected to the reinforcement plate on one side, and a group of mounting interfaces connected to the SAR radar antenna are respectively provided at both ends of the hypotenuse of the triangular configuration; a group of third threaded hole interfaces connected to the SAR radar antenna are provided in the middle of the long right-angled side of the triangular configuration; a group of fifth threaded hole interfaces connected to the reinforcement bracket are also provided in the middle of the triangular configuration.
[0010] Furthermore, the reinforcing plate is a trapezoidal flat plate configuration with a hollow middle, and a group of third through hole interfaces connected to the main connecting bracket are provided on the trapezoidal short sides of the trapezoidal flat plate configuration, a group of fourth through hole interfaces connected to the antenna connecting frame are respectively provided at both ends of the trapezoidal long sides of the trapezoidal flat plate configuration, a group of fifth through hole interfaces connected to the SAR radar antenna IMU unit are provided in the middle of the trapezoidal long sides of the trapezoidal flat plate configuration, and a group of sixth through hole interfaces reserved for lifting are also provided on the trapezoidal long sides of the trapezoidal flat plate configuration.
[0011] Furthermore, the fourth through hole interface, the sixth through hole interface and the fifth through hole interface are symmetrically distributed on the long sides of the trapezoid of the trapezoidal flat plate configuration.
[0012] Furthermore, the reinforcement bracket is a rectangular strip structure, a groove is provided in the middle of the reinforcement bracket, and seventh through hole interfaces are provided at both ends of the reinforcement bracket for connection with the fifth threaded hole interface on the antenna connecting frame; a sixth threaded hole interface is provided in the middle of the reinforcement bracket for connection with the SAR radar antenna IMU unit.
[0013] Compared with the prior art, the antenna connection bracket for airborne testing of SAR radar antenna described in the utility model has the following advantages:
[0014] The utility model discloses an antenna connection bracket for airborne testing of a SAR radar antenna. The antenna connection bracket has sufficient rigidity and strength, and can assist the fixed-angle tooling of the antenna airborne testing to keep the SAR radar antenna at a fixed angle with the horizontal plane, thereby meeting the purpose of accurately testing the performance requirements of the SAR radar antenna. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:
[0016] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the utility model;
[0017] Figure 2 This is a schematic diagram of the main connecting bracket according to an embodiment of the utility model;
[0018] Figure 3 This is a schematic diagram of another viewing angle of the main connecting bracket according to an embodiment of the utility model;
[0019] Figure 4 This is a schematic diagram of an antenna connection frame according to an embodiment of the utility model;
[0020] Figure 5 This is a schematic diagram of a reinforcement plate according to an embodiment of the utility model;
[0021] Figure 6 This is a schematic diagram of the reinforcement bracket described in an embodiment of the utility model;
[0022] Figure 7 This is a schematic diagram of an antenna airborne test fixed angle tooling based on an antenna connection bracket for airborne testing of a SAR radar antenna according to an embodiment of the utility model;
[0023] Figure 8 This is a schematic diagram of the connection between the test fixture assembly and the SAR radar antenna assembly according to an embodiment of the utility model;
[0024] Fig. 9 This is a schematic diagram of a test fixture assembly according to an embodiment of the utility model;
[0025] Fig.10 This is a schematic diagram of the IMU mounting plate described in an embodiment of the utility model;
[0026] Fig.11 This is a schematic diagram of an APOS installation plate according to an embodiment of the utility model;
[0027] Fig.12 This is a schematic diagram of the antenna adapter block described in an embodiment of the utility model.
[0028] Description of reference numerals:
[0029] 1. Aircraft load compartment; 11. Radome; 12. Mounting bracket; 2. Test fixture assembly; 21. Main connecting bracket; 211. First through hole interface; 212. Second through hole interface; 213. First threaded hole interface; 22. Antenna connecting bracket; 221. Second threaded hole interface; 222. Mounting interface; 223. Third threaded hole interface; 224. Fourth threaded hole interface; 225. Fifth threaded hole interface; 23. Reinforcement plate; 231. Third through hole interface; 232. Four through-hole interfaces; 233, fifth through-hole interface; 234, sixth through-hole interface; 24, reinforcement bracket; 241, seventh through-hole interface; 242, sixth threaded hole interface; 25, IMU mounting plate; 251, seventh threaded hole interface; 252, first countersunk hole; 253, eighth threaded hole interface; 26, APOS mounting plate; 27, antenna adapter block; 3, SAR radar antenna assembly; 31, SAR radar antenna; 32, IMU unit; 33, APOS stand-alone. DETAILED DESCRIPTION
[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0031] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 therefore cannot be understood as a limitation on 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 number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0034] like Figure 1 As shown, an antenna connection bracket for airborne testing of SAR radar antennas includes two main connection brackets 21, two antenna connection brackets 22, two reinforcing plates 23 and a reinforcing bracket 24. The two antenna connection brackets 22 are symmetrically arranged, and the middle parts of the two antenna connection brackets 22 are connected by a reinforcing bracket 24. Two main connection brackets 21 are respectively installed at both ends above the two antenna connection brackets 22, and both ends of each main connection bracket 21 are respectively installed to an antenna connection bracket 22, and a reinforcing plate 23 is also installed on one side of each main connection bracket 21.
[0035] Figure 2-Figure 3 The main connecting bracket 21 is shown, which includes the following main interfaces: 3 groups of first through hole interfaces 211 connected to the mounting bracket 12, each group includes 4 through holes; the two ends are second through hole interfaces 212 connected to the antenna connecting frame 22; and a group of first threaded hole interfaces 213 are reserved in the middle for threading with the reinforcing plate 23.
[0036] Figure 4 The antenna connection frame 22 is shown. The antenna connection frame 22 is a triangular configuration. The long right-angled side is connected to the main connection bracket 21, and the hypotenuse is connected to the SAR radar antenna 31 of the antenna airborne test fixed angle fixture. It can play the role of keeping the SAR radar antenna 31 at a certain angle with the horizontal plane. It includes the following main interfaces: the long right-angled side has two groups of bosses, and the bosses have two groups of second threaded hole interfaces 221 connected to the main connection bracket 21; the bottom surface is a plurality of installation interfaces 222 connected to the antenna adapter block 27; the middle of the long right-angled side has a group of third threaded hole interfaces 223 connected to the APOS mounting plate 26 of the antenna airborne test fixed angle fixture; the side of the long right-angled side boss has two groups of fourth threaded hole interfaces 224 connected to the reinforcement plate 23; and the fifth threaded hole interface 225 connected to the reinforcement bracket 24. In addition to the above features, the antenna connection frame 22 is hollowed out and reinforced to reduce weight.
[0037] Figure 5 The reinforcing plate 23 is shown. The reinforcing plate 23 is a trapezoidal flat plate configuration with a hollow middle, and includes the following main interfaces: a group of third through-hole interfaces 231 connected to the main connecting bracket 21, located on the short side of the trapezoid; two groups of fourth through-hole interfaces 232 connected to the antenna connecting frame 22; two fifth through-hole interfaces 233 connected to the IMU mounting plate 25 of the fixed angle tooling for antenna airborne testing; and two sixth through-hole interfaces 234 reserved for lifting. The fourth through-hole interface 232, the fifth through-hole interface 233 and the sixth through-hole interface 234 are symmetrically distributed on the long side of the trapezoid.
[0038] Figure 6The reinforcing bracket 24 is shown. The reinforcing bracket 24 is a rectangular strip with a groove reinforcement in the middle to reduce weight. It includes the following main interfaces: the seventh through hole interface 241 connected to the fifth threaded hole interface 225 on the antenna connecting frame 22 at both ends; and the sixth threaded hole interface 242 connected to the IMU mounting plate 25 in the middle.
[0039] The antenna connection bracket has sufficient rigidity and strength, and can assist the antenna airborne test fixed angle fixture to keep the SAR radar antenna at a fixed angle with the horizontal plane, thereby meeting the purpose of accurately testing the performance requirements of the SAR radar antenna.
[0040] like Figure 7 As shown, an antenna airborne test fixed-angle fixture based on an antenna connecting bracket for airborne testing of a SAR radar antenna comprises an aircraft payload compartment 1, a test fixture assembly 2 and a SAR radar antenna assembly 3. The SAR radar antenna assembly 3 is mounted on the test fixture assembly 2, and the test fixture assembly 2 is mounted in the aircraft payload compartment 1 so that the SAR radar antenna 3 maintains a certain angle with the ground.
[0041] Figure 7 The aircraft load compartment 1 is shown, and the aircraft model is a manned Cessna 208, which mainly includes a radome 11 and a mounting bracket 12. The mounting bracket 12 is composed of two parallel load-bearing beams, and there are multiple groups of mounting through-hole interfaces in the load-bearing beams. The test fixture assembly 2 is connected to the load-bearing beams through the mounting through-hole interfaces.
[0042] like Figure 8 As shown, the SAR radar antenna assembly 3 includes a SAR radar antenna 31, an IMU unit 32, and an APOS unit 33. The SAR radar antenna 31 is installed on the lower docking surface of the test fixture assembly 2 and at a fixed angle thereto; the IMU unit 32 and the APOS unit 33 are installed on the upper bracket of the test fixture assembly 2.
[0043] like Fig. 9 The test fixture assembly 2 is shown, the main body of which is made of 7075-T6 aluminum alloy and is screwed together. The antenna bracket is arranged with multiple external interfaces such as through holes and threaded holes for versatility. The test fixture assembly 2 is mainly composed of: an antenna connection bracket, a reinforcement bracket 24, an IMU mounting plate 25, an APOS mounting plate 26, and multiple antenna adapter blocks 27. All components are screwed together, and the fixture assembly 2 is connected to the mounting bracket 12 through the antenna connection bracket; connected to the SAR radar antenna 31 through the antenna connection bracket and the antenna adapter block 27; the reinforcement plate 23 of the antenna connection bracket, the reinforcement bracket 24 and the IMU mounting plate 25 are internal connectors, which can greatly increase the stiffness of the entire test fixture assembly 2. Make the test fixture assembly 2 have higher strength, stiffness, and maintain accuracy.
[0044] Fig.10 The IMU mounting plate 25 is shown. The IMU mounting plate 25 is a flat plate plus a boss configuration. The boss is for increasing the docking accuracy, and includes the following main interfaces to the outside: the four corner high bosses are each provided with a seventh threaded hole interface 251 connected to the reinforcing plate 23; two first countersunk holes 252 connected to the reinforcing bracket 24 are provided in the middle; and the four middle low bosses are each provided with an eighth threaded hole interface 253 for installing the IMU unit 32.
[0045] Figure 11-12 The APOS mounting plate 26 and the antenna adapter block 27 are shown. The APOS mounting plate 26 is connected to the antenna connecting frame 22 through a countersunk hole, and the APOS stand-alone 33 is installed through a boss with a threaded hole (ninth threaded hole interface). The antenna adapter block 27 is a circular notch feature, which is convenient for operation with external tools. The four outer tenth threaded hole interfaces are connected to the antenna connecting frame 22, and the circular notch in the middle is connected to the SAR radar antenna 31.
[0046] like Fig. 9 The figure shows the state of the test fixture assembly 2 being installed and assembled. The three groups of first through-hole interfaces 211 on the main connection bracket 21 are connected to the mounting bracket 12; the second through-hole interface 212 on the main connection bracket 21 is connected to the second threaded hole interface 221 on the antenna connection frame 22; the first threaded hole interface 213 on the main connection bracket 21 is used to be screwed with the third through-hole interface 231 on the reinforcing plate 23. The fourth through-hole interface 232 on the reinforcing plate 23 is connected to the fourth threaded hole interface 224 on the antenna connection frame 22; the fifth through-hole interface 233 on the reinforcing plate 23 is connected to the seventh threaded hole interface 251 on the IMU mounting plate 25. The seventh through-hole interface 241 at both ends of the reinforcing bracket 24 is connected to the fifth threaded hole interface 225 on the antenna connection frame 22; the sixth threaded hole interface 242 in the middle of the reinforcing bracket 24 is connected to the first countersunk hole 252 on the IMU mounting plate. The APOS mounting plate 26 is installed on the third threaded hole interface 223 on the antenna connection frame 22. The antenna adapter block 27 is mounted on the mounting interface 222 on the antenna connecting frame 22. The entire test fixture assembly 2 has high strength, rigidity, and retention accuracy.
[0047] The antenna airborne test fixed-angle tooling based on the antenna connection bracket for airborne test of SAR radar antenna is suitable for SAR radar antenna subarray test. The tooling can install the SAR radar antenna subarray onto the aircraft payload bay bearing bracket. It has sufficient rigidity, strength and angular accuracy to meet the requirements of imaging accuracy. The antenna airborne test fixed-angle tooling based on the antenna connection bracket for airborne test of SAR radar antenna is designed to keep the SAR radar antenna at a fixed angle with the horizontal plane. The tooling adopts a purely mechanical design and has the advantages of low system complexity and low implementation difficulty.
[0048] Working principle of the antenna airborne test fixed angle fixture based on the antenna connection bracket for airborne test of SAR radar antenna:
[0049] The first step is to assemble the main connection bracket 21, two antenna connection brackets 22, two reinforcement plates 23, reinforcement bracket 24, IMU mounting plate 25, and APOS mounting plate 26; the second step is to install the IMU unit 32 and APOS stand-alone 33 to the corresponding interface positions on the test fixture assembly 2; the third step is to use tools to install the antenna adapter block 27 to the SAR radar antenna 31; the third step is to install the SAR radar antenna 31 with the antenna adapter block 27 to the antenna connection bracket 22 of the test fixture assembly 2; the fourth step is to install the test fixture assembly 2 with the SAR radar antenna assembly 3 to the mounting bracket 12 in the aircraft load compartment 1, and then close the radome 11. The subsequent flight test can be carried out.
[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An antenna connection bracket for airborne testing of SAR radar antennas, characterized in that: The invention comprises two main connection brackets (21), two antenna connection brackets (22), two reinforcing plates (23) and a reinforcing bracket (24), wherein the two antenna connection brackets (22) are symmetrically arranged, the middle parts of the two antenna connection brackets (22) are connected by the reinforcing bracket (24), two main connection brackets (21) are respectively installed at two ends above the two antenna connection brackets (22), the two ends of each main connection bracket (21) are respectively installed to one antenna connection bracket (22), and a reinforcing plate (23) is also respectively installed on one side of each main connection bracket (21).
2. The antenna connection bracket for airborne testing of SAR radar antenna according to claim 1, characterized in that: The main connection bracket (21) comprises a main connection body, the surface of the main connection body is provided with three groups of first through hole interfaces (211), the first through hole interfaces (211) are used to dock with the mounting bracket (12) of the aircraft load compartment (1), the two ends of the main connection body are respectively provided with a mounting boss, each mounting boss is provided with a plurality of second through hole interfaces (212), the second through hole interfaces (212) are used to connect to the antenna connection frame (22), and the middle part of the main connection body is provided with a group of first threaded hole interfaces (213), the first threaded hole interfaces (213) are used to be screwed with the reinforcing plate (23).
3. The antenna connection bracket for airborne testing of SAR radar antenna according to claim 2, characterized in that: Each group of the first through hole interfaces (211) comprises four through holes respectively.
4. The antenna connection bracket for airborne testing of SAR radar antenna according to claim 1, characterized in that: The antenna connection frame (22) is a triangular configuration, the long right-angled side of the triangular configuration is connected to the main connection bracket (21), the hypotenuse of the triangular configuration is connected to the SAR radar antenna (31), the long right-angled side of the triangular configuration is provided with two groups of bosses, each boss is provided with a group of second threaded hole interfaces (221) connected to the main connection bracket (21); each boss is also provided with a group of fourth threaded hole interfaces (224) connected to the reinforcing plate (23) on one side, and a group of mounting interfaces (222) connected to the SAR radar antenna are provided at both ends of the hypotenuse of the triangular configuration; a group of third threaded hole interfaces (223) connected to the SAR radar antenna is provided in the middle of the long right-angled side of the triangular configuration; and a group of fifth threaded hole interfaces (225) connected to the reinforcing bracket (24) is also provided in the middle of the triangular configuration.
5. The antenna connection bracket for airborne testing of SAR radar antenna according to claim 1, characterized in that: The reinforcing plate (23) is a trapezoidal flat plate configuration with a hollow middle, a group of third through-hole interfaces (231) connected to the main connecting bracket (21) are provided on the trapezoidal short sides of the trapezoidal flat plate configuration, a group of fourth through-hole interfaces (232) connected to the antenna connecting bracket (22) are provided at both ends of the trapezoidal long sides of the trapezoidal flat plate configuration, a group of fifth through-hole interfaces (233) connected to the SAR radar antenna IMU unit is provided in the middle of the trapezoidal long sides of the trapezoidal flat plate configuration, and a group of sixth through-hole interfaces (234) reserved for lifting are also provided on the trapezoidal long sides of the trapezoidal flat plate configuration.
6. The antenna connection bracket for airborne testing of SAR radar antenna according to claim 5, characterized in that: The fourth through hole interface (232), the sixth through hole interface (234) and the fifth through hole interface (233) are symmetrically distributed on the long side of the trapezoid of the trapezoidal flat plate configuration.
7. The antenna connection bracket for airborne testing of SAR radar antenna according to claim 4, characterized in that: The reinforcing bracket (24) is a rectangular strip-shaped structure, a groove is provided in the middle of the reinforcing bracket (24), and a seventh through hole interface (241) connected to a fifth threaded hole interface (225) on the antenna connecting frame (22) is provided at both ends of the reinforcing bracket (24); a sixth threaded hole interface (242) connected to a SAR radar antenna IMU unit is provided in the middle of the reinforcing bracket (24).