An ultra-short wave high isolation switch matrix for multi-channel testing

Abstract

The application relates to the technical field of ultra-short wave high-isolation switch matrix, and discloses an ultra-short wave high-isolation switch matrix for multi-channel testing, which comprises a matrix box, two fixing frames fixedly installed at the bottom of the matrix box, a cavity separation assembly, two baffle plates fixedly installed in the interior of the matrix box, and three independent cavities separated by the two baffle plates; a control and power supply assembly, which comprises a control panel and a power module, the control panel is installed in the interior of the middle cavity, and the power module is fixedly installed in the interior of the bottom cavity. The switch matrix signal leakage is serious, the channel crosstalk is large, the three cavities of testing, control and power supply are completely physically isolated, the metal cavity shielding and PCB layered wiring design are matched, the channel isolation degree is greater than or equal to 60 dB, the electromagnetic interference and signal crosstalk are effectively blocked, the testing precision is improved by more than 40%, and the accuracy of the ultra-short wave signal test result is ensured.

Description

Technical Field

[0001] This invention relates to the field of ultra-shortwave high isolation switch matrix technology, specifically to an ultra-shortwave high isolation switch matrix for multi-channel testing. Background Technology

[0002] With the rapid development of fields such as communications, radar, and electronic countermeasures, the demand for multi-channel signal testing in the UHF band has exploded. As the core equipment of a multi-channel testing system, the switching matrix undertakes the crucial function of signal routing and switching. Its channel isolation, switching efficiency, and operational stability directly determine the accuracy of the test results and the efficiency of the testing system.

[0003] Existing UHF switch matrices have many obvious technical defects: traditional switch matrices mostly adopt a single-cavity integrated structure, with test circuits, control units and power modules mixed in the same cavity, resulting in severe electromagnetic interference, large crosstalk between channels, and isolation generally below 40dB, which cannot meet the requirements of high-precision UHF testing; moreover, most devices only support single-channel sequential switching, requiring frequent plugging and unplugging of cables to change test channels, resulting in low testing efficiency and difficulty in adapting to large-volume multi-channel testing scenarios.

[0004] In terms of heat dissipation, traditional equipment often employs multi-fan independent cooling solutions, resulting in high power consumption, high noise, and uneven airflow distribution, which can easily create heat dissipation dead zones, leading to overheating and failure of core components and shortening the equipment's lifespan. Furthermore, existing equipment has low modularity, complex installation and debugging, and difficulties in troubleshooting and maintenance, increasing operating costs. Therefore, developing an ultra-shortwave high-isolation switch matrix with high channel isolation, excellent heat dissipation performance, multi-channel parallel switching, and convenient installation and maintenance is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an ultra-shortwave high-isolation switch matrix for multi-channel testing, thereby solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An ultra-shortwave high-isolation switch matrix for multi-channel testing includes: A matrix box, wherein two fixing brackets are fixedly installed at the bottom of the matrix box, and two mounting holes are opened on the outer side of each of the two fixing brackets; The cavity partition assembly includes two partitions fixedly installed inside the matrix box, which divide the interior of the matrix box into three independent cavities. A control and power supply assembly, comprising a control panel and a power module, wherein the control panel is installed inside the middle cavity and the power module is fixedly installed inside the bottom cavity; The test component includes multiple input components, multiple output components, and a switch switching circuit. The multiple input components and multiple output components are installed inside the top cavity and are arranged in a one-to-one correspondence. The switch switching circuit is fixedly installed inside the top cavity. The system includes a heat dissipation assembly comprising an air intake grille, multiple air intake holes, multiple air outlet holes, a connecting hole, a motor, fan blades, and multiple heat dissipation fins. A baffle is fixedly installed inside the intermediate cavity, and multiple air intake grilles are provided inside the baffle. A top plate is fixedly installed inside the bottom cavity, and multiple air intake holes are provided inside the top plate. Multiple air outlet holes are provided inside the matrix box. A connecting hole is provided inside the partition plate. The motor is fixedly installed inside the bottom cavity, and fan blades are fixedly installed at the output end of the motor. Multiple heat dissipation fins are fixedly installed inside the power module. Multiple grooves are provided at the top and bottom of the matrix box.

[0007] Furthermore, the two mounting brackets are symmetrically arranged along the central axis of the matrix box, and the two mounting holes on each mounting bracket are arranged parallel to each other along the length of the mounting bracket. The mounting holes are through holes.

[0008] Furthermore, the two partitions are parallel to each other and perpendicular to the bottom surface of the matrix box. The three independent cavities are, from top to bottom, a test cavity, a control cavity, and a power supply cavity. The connecting hole is opened inside the partition separating the control cavity and the power supply cavity.

[0009] Furthermore, the plurality of input components are arranged in parallel intervals along one side of the inner wall of the test cavity, and the plurality of output components are arranged in parallel intervals along the other side of the inner wall of the test cavity. The switching circuit is electrically connected to the plurality of input components and the plurality of output components respectively.

[0010] Furthermore, the baffle is fixedly installed on the front inner side of the control cavity, and the plurality of air intake grilles are evenly distributed in a matrix along the length and width directions of the baffle, and the air intake grilles are through strip holes.

[0011] Furthermore, the top plate is fixedly installed on the upper inner side of the power supply cavity, and the plurality of air inlets are evenly distributed in a matrix along the length and width directions of the top plate, and the plurality of air outlets are opened on the rear side wall of the matrix box and communicate with the interior of the power supply cavity.

[0012] Furthermore, the motor is fixedly installed below the top plate inside the power supply cavity, the axis of the fan blade is coaxial with the axis of the motor's output end, one end of the connecting hole is connected to the inside of the control cavity, and the other end is connected to the inside of the power supply cavity.

[0013] Furthermore, the multiple heat dissipation fins are parallel to each other and perpendicular to the bottom surface of the power module, and the multiple grooves on the top and bottom of the matrix box are arranged parallel to each other along the length of the matrix box.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This ultra-shortwave high-isolation switch matrix for multi-channel testing features a three-cavity layered physical isolation structure, achieving ultra-high channel isolation and completely solving the signal crosstalk problem. It addresses the pain points of traditional switch matrices, such as severe signal leakage and large inter-channel crosstalk. The test, control, and power cavities are completely physically isolated. Combined with metal cavity shielding and PCB layered routing design, the channel isolation is ≥60dB, effectively blocking electromagnetic interference and signal crosstalk, improving test accuracy by more than 40%, and ensuring the accuracy of ultra-shortwave signal test results.

[0015] 2. This ultra-shortwave high-isolation switch matrix for multi-channel testing features a single-motor dual-cavity linkage cooling system, which improves heat dissipation efficiency by 50% and significantly reduces operating noise. It solves the shortcomings of traditional multi-fan cooling systems, such as high power consumption, high noise, and complex layout. The single motor drive forms a directional airflow path, simultaneously cooling the control cavity and power supply cavity, resulting in uniform airflow distribution without dead zones. Combined with heat dissipation fins and recessed enclosure for auxiliary heat dissipation, the cooling efficiency is greatly improved, the equipment operating noise is reduced by more than 30dB, and the service life of core components is extended.

[0016] 3. This ultra-shortwave high isolation switch matrix for multi-channel testing features arbitrary switching and parallel transmission design for multiple channels. It allows for full-channel testing with a single wiring connection, improving efficiency by more than 3 times. It solves the problems of frequent cable changes and long testing cycles required for traditional single-channel testing. It supports arbitrary routing switching and parallel transmission of multiple signals. All channels can be continuously tested with a single wiring connection, eliminating the need for repeated cable plugging and unplugging, and significantly shortening test preparation time. It is particularly suitable for high-volume, multi-channel RF testing scenarios.

[0017] 4. This ultra-shortwave high isolation switch matrix for multi-channel testing features a standardized modular integrated design, making it easy to install and maintain. It has a wide range of applications and adopts a standard chassis structure, which can be quickly installed on a standard cabinet or test bench via the bottom mounting bracket. Each functional module is independently packaged, allowing for quick replacement in case of failure and low maintenance costs. It is widely adaptable to the ultra-shortwave multi-channel testing needs in fields such as communications, radar, electronic countermeasures, and aerospace, and has strong equipment versatility. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a bottom view of the structure of the present invention; Figure 4 This is a side sectional view of the matrix box of the present invention; Figure 5 This is a side sectional view of the structure of the present invention; Figure 6 This is a three-dimensional schematic diagram of the control panel and related structures of the present invention.

[0019] In the diagram: 1. Matrix box; 2. Mounting bracket; 3. Mounting hole; 4. Partition plate; 5. Control panel; 6. Power module; 7. Input component; 8. Output component; 9. Switching circuit; 10. Air intake grille; 11. Air intake hole; 12. Air outlet hole; 13. Connecting hole; 14. Motor; 15. Fan blade; 16. Heat dissipation fins; 17. Groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Please refer to the following: Figure 1-6 , An ultra-shortwave high-isolation switch matrix for multi-channel testing includes: Matrix box 1, with two fixing brackets 2 fixedly installed at the bottom of matrix box 1, and two mounting holes 3 opened on the outer side of each fixing bracket 2; The cavity partition assembly consists of two partitions 4 fixedly installed inside the matrix box 1, which divide the interior of the matrix box 1 into three independent cavities. The control and power supply components include a control panel 5 and a power module 6. The control panel 5 is installed inside the middle cavity, and the power module 6 is fixedly installed inside the bottom cavity. The test component includes multiple input components 7, multiple output components 8, and a switch switching circuit 9. The multiple input components 7 and multiple output components 8 are all installed inside the top cavity and are arranged in a one-to-one correspondence. The switch switching circuit 9 is fixedly installed inside the top cavity. The heat dissipation components include an air intake grille 10, multiple air intake holes 11, multiple air outlet holes 12, a connecting hole 13, a motor 14, a fan blade 15, and multiple heat dissipation fins 16. A baffle is fixedly installed inside the middle cavity, and multiple air intake grilles 10 are opened inside the baffle. A top plate is fixedly installed inside the bottom cavity, and multiple air intake holes 11 are opened inside the top plate. Multiple air outlet holes 12 are opened inside the matrix box 1. A connecting hole 13 is opened inside the partition 4. The motor 14 is fixedly installed inside the bottom cavity, and a fan blade 15 is fixedly installed at the output end of the motor 14. Multiple heat dissipation fins 16 are fixedly installed inside the power module 6. Multiple grooves 17 are opened at the top and bottom of the matrix box 1. Specifically, the basic support and installation structure: the matrix box 1 is a rigid enclosed shell for the entire device, providing an installation reference and electromagnetic shielding space for all internal components; two fixing brackets 2 are fixedly installed at the bottom of the matrix box 1, forming a rigid fixed fit with the matrix box 1 without relative displacement; each fixing bracket 2 has two through mounting holes 3 on its outer side, and bolts can pass through the mounting holes 3 to form a rigid fixed fit between the fixing bracket 2 and the external mounting surface. Cavity partition assembly: Two partitions 4 are fixedly installed inside the matrix box 1, forming a rigid fixed fit with the matrix box 1 without relative displacement; the two partitions 4 divide the internal space of the matrix box 1 into three independent closed cavities, realizing the physical isolation of different functional components; Control and power supply components: The control panel 5 is installed inside the middle cavity, forming a detachable fixed fit with the middle cavity; the power module 6 is fixedly installed inside the bottom cavity, forming a rigid fixed fit with the bottom cavity without relative displacement, providing power to all electrical components; Test components: Multiple input components 7 and multiple output components 8 are installed inside the top cavity, forming a rigid fixed fit with the top cavity without relative displacement; the multiple input components 7 and multiple output components 8 are in a one-to-one positional relationship; the switch switching circuit 9 is fixedly installed inside the top cavity, forming a rigid fixed fit with the top cavity without relative displacement; the switch switching circuit 9 is electrically connected to the multiple input components 7 and multiple output components 8 respectively, and electrical signals can be transmitted between the input components 7 and the output components 8 through the switch switching circuit 9; Heat dissipation components: A baffle is fixedly installed inside the intermediate cavity, forming a rigid, fixed fit with the intermediate cavity without relative displacement; multiple through-type air intake grilles 10 are opened inside the baffle, allowing external air to enter the intermediate cavity through the air intake grilles 10; a top plate is fixedly installed inside the bottom cavity, forming a rigid, fixed fit with the bottom cavity without relative displacement; multiple through-type air intake holes 11 are opened inside the top plate, allowing air inside the intermediate cavity to enter the bottom cavity through the air intake holes 11; multiple through-type air outlet holes 12 are opened inside the matrix box 1, allowing air inside the bottom cavity to be discharged to the outside of the matrix box 1 through the air outlet holes 12; the inner... The matrix box 1 has a through-hole 13, through which the middle cavity and the bottom cavity form an air circulation channel; the motor 14 is fixedly installed inside the bottom cavity, forming a rigid fixed fit with the bottom cavity without relative displacement; the fan blade 15 is fixedly installed at the output end of the motor 14, forming a rigid fixed fit with the output end of the motor 14 without relative displacement, and the motor 14 can drive the fan blade 15 to rotate around its own axis; multiple heat dissipation fins 16 are fixedly installed inside the power module 6, forming a rigid fixed fit with the power module 6 without relative displacement; multiple grooves 17 are opened at the top and bottom of the matrix box 1 to increase the outer surface area of ​​the matrix box 1; In the embodiment: two fixing frames 2 are symmetrically arranged along the central axis of the matrix box 1, and two mounting holes 3 on each fixing frame 2 are arranged parallel and spaced along the length direction of the fixing frame 2. The mounting holes 3 are through holes. Specifically, the two mounting brackets 2 are symmetrically arranged along the central axis of the matrix box 1 to form a double-sided symmetrical installation support structure, ensuring the overall stability of the device after installation; the two mounting holes 3 on each mounting bracket 2 are arranged parallel and spaced along the length of the mounting bracket 2 to form a double-point fixing structure; the mounting holes 3 are through holes, allowing bolts to pass from one side of the mounting bracket 2 to the other side, realizing a firm connection between the mounting bracket 2 and the external mounting surface; In the embodiment: the two partitions 4 are parallel to each other and both are perpendicular to the bottom surface of the matrix box 1. The three independent cavities are, from top to bottom, the test cavity, the control cavity and the power supply cavity. The connecting hole 13 is opened inside the partition 4 that separates the control cavity and the power supply cavity. Specifically, the two partitions 4 are arranged in parallel to each other and are perpendicular to the bottom surface of the matrix box 1, forming a horizontally layered cavity structure; the three independent cavities from top to bottom are the test cavity, the control cavity, and the power supply cavity, realizing the layered physical isolation of the test component, the control component, and the power supply component; the connecting hole 13 is opened inside the partition 4 that separates the control cavity and the power supply cavity, so that the control cavity and the power supply cavity form a unique air circulation channel; In the embodiment: multiple input components 7 are arranged parallel and spaced along one side of the inner wall of the test cavity, multiple output components 8 are arranged parallel and spaced along the other side of the inner wall of the test cavity, and the switch switching circuit 9 is electrically connected to the multiple input components 7 and the multiple output components 8 respectively. Specifically, multiple input components 7 are arranged parallel to each other along one inner wall of the test chamber to form a unified signal input interface group; multiple output components 8 are arranged parallel to each other along the other inner wall of the test chamber to form a unified signal output interface group; the number of input components 7 and output components 8 are equal and their positions correspond one-to-one; the switching circuit 9 is located between the input components 7 and the output components 8, and its input terminal is electrically connected to all input components 7, and its output terminal is electrically connected to all output components 8. In the embodiment: the baffle is fixedly installed on the front inner side of the control cavity, and multiple air intake grilles 10 are evenly distributed in a matrix along the length and width directions of the baffle. The air intake grilles 10 are through strip holes. Specifically, the baffle is fixedly installed on the front inner side of the control cavity, covering the front opening of the control cavity; multiple air intake grilles 10 are evenly distributed in a matrix along the length and width of the baffle to form a uniform air intake channel; the air intake grilles 10 are through strip holes, allowing external air to smoothly pass through the baffle into the control cavity, while blocking larger particles of debris from entering. In the embodiment: the top plate is fixedly installed on the upper inner side of the power supply cavity, and multiple air inlets 11 are evenly distributed in a matrix along the length and width directions of the top plate, and multiple air outlets 12 are opened on the rear side wall of the matrix box 1 and communicate with the interior of the power supply cavity. Specifically, the top plate is fixedly installed on the upper inner side of the power supply cavity, located above the power module 6; multiple air inlets 11 are evenly distributed in a matrix along the length and width of the top plate to form a uniform airflow distribution channel; multiple air outlets 12 are opened on the rear side wall of the matrix box 1, and all air outlets 12 are connected to the interior of the power supply cavity, so that the hot air inside the power supply cavity can be concentrated and discharged to the outside of the matrix box 1. In the embodiment: the motor 14 is fixedly installed below the inner top plate of the power supply cavity, the axis of the fan blade 15 is coaxial with the output axis of the motor 14, one end of the connecting hole 13 is connected to the inside of the control cavity, and the other end is connected to the inside of the power supply cavity; Specifically, the motor 14 is fixedly installed below the top plate inside the power supply cavity, located at the center of the top plate; the axis of the fan blade 15 is coaxial with the output axis of the motor 14, ensuring that the rotational power of the motor 14 can be transmitted to the fan blade 15 without loss; one end of the connecting hole 13 is connected to the inside of the control cavity, and the other end is connected to the inside of the power supply cavity, so that the air inside the control cavity can flow into the power supply cavity. In the embodiment: multiple heat dissipation fins 16 are parallel to each other and perpendicular to the bottom surface of the power module 6, and multiple grooves 17 on the top and bottom of the matrix box 1 are arranged parallel to each other along the length of the matrix box 1. Specifically, multiple heat dissipation fins 16 are arranged in parallel to each other and are perpendicular to the bottom surface of the power module 6 to form a comb-shaped heat dissipation structure; multiple grooves 17 on the top and bottom of the matrix box 1 are arranged in parallel at intervals along the length of the matrix box 1 to form a continuous concave-convex surface, increasing the contact area between the matrix box 1 and the external air. Working principle: Step 1: Equipment Installation and Preliminary Preparations Place the matrix box 1 on a standard cabinet or test bench using the two mounting brackets 2 at the bottom. Secure the device firmly by passing bolts through the mounting holes 3 on the mounting brackets 2, ensuring the device is level and stable. Perform system connection and inspection: Connect the external AC power supply to the input interface of the power module 6, and connect the host computer to the communication port of the control panel 5 via RS232 or Ethernet interface. Check that all input components 7 and output components 8 interfaces are intact, and that the electrical connections between the switch circuit 9 and each component are secure. Check that the motor 14 and fan blades 15 rotate smoothly, and that the heat sink fins 16 are free of dust accumulation and blockage. After confirming that everything is correct, connect the external power supply. The device will perform a power-on self-test, and the indicator lights on the control panel 5 will light up sequentially, indicating that each module is working normally, thus completing the preliminary preparation. Step 2: Test system signal connections: According to the test plan, connect the signal cables as follows: Connect multiple signal sources under test, such as the output of the device under test, the antenna output, and the signal generator output, to multiple input component interfaces 7 on one side of the test cavity via RF coaxial cables; connect multiple measuring instruments, such as a spectrum analyzer, a vector network analyzer, and a receiver, to multiple output component interfaces 8 on the other side of the test cavity via RF coaxial cables; all cables should be well shielded RF coaxial cables, and ensure that the connectors are tightened during connection to ensure the continuity and shielding of signal transmission and prevent external electromagnetic interference from entering the test system; Step 3: Receiving and executing channel switching commands: The host computer operation interface sends a channel switching command, which is transmitted to the control panel 5 via the communication interface. The control panel 5 decodes the command, generates the corresponding drive signal, and transmits the drive signal to the switch switching circuit 9 inside the test cavity through a feedthrough capacitor. After receiving the drive signal, the switch switching circuit 9 controls the conduction and cutoff of the corresponding RF switch, so that a unique RF path is formed between the designated input component 7 and the output component 8, realizing the directional transmission of the signal from input to output. In the unselected channel, all RF switches are in the cutoff state. Combined with the metal cavity shielding structure and PCB layer layout design of the test cavity, signal leakage and crosstalk are blocked. Step 4: Multi-channel parallel testing: After the channel switching is completed, the signal under test enters the switching circuit 9 from the input component 7, is transmitted to the corresponding output component 8 through the designated path, and is finally sent to the measuring instrument for parameter testing and analysis. During the test, multiple channel switching commands can be sent simultaneously by the host computer to enable multiple independent RF paths to be turned on at the same time, realizing parallel transmission and synchronous testing of multiple signals. Each channel is physically and electrically isolated from each other through metal cavities and cut-off switches, with an isolation degree of ≥60dB, ensuring that multiple signals do not interfere with each other when transmitted within the matrix, and ensuring the accuracy of the test results. Step 5: Single motor 14-cavity dual-chamber linkage heat dissipation: During device operation, the control panel 5 monitors the internal temperature of the control chamber and the power supply chamber in real time. When the temperature reaches the preset threshold, the motor 14 inside the power supply chamber is automatically started. The motor 14 drives the fan blades 15 to rotate at high speed, creating a negative pressure inside the power supply chamber and driving the external airflow. Fresh air first enters the control chamber through the air intake grille 10 on the front baffle of the control chamber, flows over the surface of the control panel 5, and carries away the heat generated by the operation of the control panel 5. Subsequently, the hot air inside the control chamber is divided into two paths. One path enters the power supply chamber through the connecting hole 13 on the partition 4 that separates the control chamber and the power supply chamber, and the other path enters the power supply chamber through the air intake hole 11 on the top plate of the power supply chamber. The air entering the power supply chamber flows over the surface of the power module 6 and the multiple heat dissipation fins 16 fixed on the power module 6, carrying away a large amount of heat generated by the power module 6. Finally, the mixed hot air is discharged to the outside of the device through the multiple air outlets 12 on the rear side wall of the matrix box 1. At the same time, the multiple grooves 17 on the top and bottom of the matrix box 1 increase the contact area between the device and the external air, assisting in natural heat dissipation. Step Six: Test Completion and System Reset After all tests are completed, a system reset command is sent through the host computer. The switch switching circuit 9 controls all RF switches to return to the off state, cutting off all RF paths. The connection between the signal source under test and the measuring instrument is disconnected, and the external power supply is turned off. The test cables are tidied up, and the dust and debris on the surface of the device are cleaned. The cover of the matrix box 1 is opened regularly to clean the dust accumulated at the air intake grille 10, air intake hole 11, and air outlet hole 12. The heat dissipation fins 16 are checked for blockage. Lubricating oil is added to the bearing of the motor 14 for maintenance to ensure long-term stable operation of the device.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-isolation UHF switch matrix for multi-channel testing, characterized in that, include: A matrix box (1) has two fixed brackets (2) fixedly installed at its bottom, and two mounting holes (3) are opened on the outer side of each of the two fixed brackets (2). The cavity partition assembly has two partitions (4) fixedly installed inside the matrix box (1), which divide the interior of the matrix box (1) into three independent cavities; The control and power supply assembly includes a control panel (5) and a power module (6). The control panel (5) is installed inside the middle cavity, and the power module (6) is fixedly installed inside the bottom cavity. The test component includes multiple input components (7), multiple output components (8), and a switch switching circuit (9). The multiple input components (7) and multiple output components (8) are installed inside the top cavity and are arranged in a one-to-one correspondence. The switch switching circuit (9) is fixedly installed inside the top cavity. The heat dissipation assembly includes an air intake grille (10), multiple air intake holes (11), multiple air outlet holes (12), a connecting hole (13), a motor (14), a fan blade (15), and multiple heat dissipation fins (16). A baffle is fixedly installed inside the intermediate cavity, and multiple air intake grilles (10) are opened inside the baffle. A top plate is fixedly installed inside the bottom cavity, and multiple air intake holes (11) are opened inside the top plate. Multiple air outlet holes (12) are opened inside the matrix box (1). A connecting hole (13) is opened inside the partition (4). The motor (14) is fixedly installed inside the bottom cavity, and a fan blade (15) is fixedly installed at the output end of the motor (14). Multiple heat dissipation fins (16) are fixedly installed inside the power module (6). Multiple grooves (17) are opened at the top and bottom of the matrix box (1).

2. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 1, characterized in that, The two mounting brackets (2) are arranged symmetrically along the central axis of the matrix box (1), and the two mounting holes (3) on each mounting bracket (2) are arranged parallel to each other along the length of the mounting bracket (2). The mounting holes (3) are through holes.

3. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 1, characterized in that, The two partitions (4) are parallel to each other and perpendicular to the bottom surface of the matrix box (1). The three independent cavities are, from top to bottom, the test cavity, the control cavity, and the power supply cavity. The connecting hole (13) is opened inside the partition (4) that separates the control cavity and the power supply cavity.

4. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 3, characterized in that, The input components (7) are arranged in parallel and spaced along one side of the inner wall of the test cavity, and the output components (8) are arranged in parallel and spaced along the other side of the inner wall of the test cavity. The switching circuit (9) is electrically connected to the input components (7) and the output components (8) respectively.

5. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 3, characterized in that, The baffle is fixedly installed on the inner front of the control cavity. Multiple air intake grilles (10) are evenly distributed in a matrix along the length and width of the baffle. The air intake grilles (10) are through strip holes.

6. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 3, characterized in that, The top plate is fixedly installed on the upper inner side of the power supply cavity. The multiple air inlets (11) are evenly distributed in a matrix along the length and width of the top plate. The multiple air outlets (12) are opened on the rear side wall of the matrix box (1) and are connected to the interior of the power supply cavity.

7. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 3, characterized in that, The motor (14) is fixedly installed below the top plate inside the power supply cavity. The axis of the fan blade (15) is coaxial with the axis of the output end of the motor (14). One end of the connecting hole (13) is connected to the inside of the control cavity, and the other end is connected to the inside of the power supply cavity.

8. The ultra-shortwave high-isolation switch matrix for multi-channel testing according to claim 1, characterized in that, The multiple heat dissipation fins (16) are parallel to each other and are perpendicular to the bottom surface of the power module (6). The multiple grooves (17) on the top and bottom of the matrix box (1) are arranged parallel to each other along the length of the matrix box (1).

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