Radio frequency signal attenuator

Abstract

The invention discloses a radio frequency signal attenuator, which comprises a shell; the radio frequency attenuator body is accommodated in the shell; the ventilation assembly is contained in the shell, the ventilation assembly further comprises a shape memory alloy, and the shape memory alloy is used for automatically adjusting air circulation when the temperature in the shell is too high; the heat dissipation assembly is contained in the shell, and the heat dissipation assembly further comprises a driving motor and fan blades and is used for accelerating air flow when the temperature in the shell is too high. According to the invention, through ingenious design of cooperative work of the ventilation assembly and the heat dissipation assembly, efficient and intelligent temperature regulation and control are realized. According to the high-precision radio frequency signal attenuator, accurate temperature response and adjustment are achieved, the protection performance and reliability of equipment are also considered, it is ensured that the high-precision radio frequency signal attenuator can keep the optimal performance under various working conditions, and a more stable and durable solution is provided for a user.

Description

Technical Field

[0001] The present invention relates to the technical field of power communication equipment, and in particular to a radio frequency signal attenuator. Background Art

[0002] The RF signal attenuator is an electronic device used to adjust the signal strength. Its working principle is to use the RF chip to adjust the signal strength. The RF signal attenuator has shown a wide range of application value in many fields such as radio, television, and communications. It can not only effectively control the quality of signal transmission, but also become a key means to optimize wireless network coverage and improve communication capacity. Specifically, in the communication system, the RF signal attenuator ensures the rationality and efficiency of the wireless network layout by carefully adjusting the signal strength; and in the context of a wider range of communication applications, it takes on the important task of adjusting the signal network attenuation to ensure the high stability and reliability of the signal transmission process.

[0003] The performance of the RF signal attenuator is directly related to the stability and reliability of the entire communication system. Given the high complexity of its internal structure and the integration of a variety of electronic components, the RF signal attenuator is particularly sensitive to environmental conditions, especially humidity. When in a high humidity environment, the metal components inside the RF signal attenuator are susceptible to oxidation and corrosion, which in turn damages its electrical performance. In addition, the intrusion of moisture may also induce leakage and short circuits between circuits, further weakening the working efficiency and posing a serious threat to the overall performance of the system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a radio frequency signal attenuator to achieve efficient heat dissipation and moisture resistance, ensure stable performance of the radio frequency signal attenuator and extend its service life.

[0005] In order to solve the above technical problems, the present invention provides a radio frequency signal attenuator, comprising:

[0006] case;

[0007] a radio frequency attenuator body accommodated in the housing;

[0008] a ventilation assembly housed in the housing, the ventilation assembly further comprising a shape memory alloy for automatically regulating air circulation when the temperature inside the housing is too high;

[0009] A heat dissipation component is accommodated in the shell, and the heat dissipation component further includes a driving motor and fan blades, which are used to accelerate air flow when the temperature inside the shell is too high.

[0010] Preferably, the ventilation assembly further comprises:

[0011] Air inlets are respectively provided on the front and back of the housing;

[0012] A fixing frame is fixedly mounted on the inner wall of the housing, and a plurality of shape memory alloys are fixedly mounted on the inner bottom wall of the fixing frame; ventilation slots are provided on the outer surfaces of both the front and rear sides of the fixing frame; and an outlet is provided on the outer surface of the top of the fixing frame;

[0013] A movable plate is slidably installed inside the fixed frame;

[0014] A baffle fixedly mounted on the top of the movable plate;

[0015] A touch block fixedly mounted on the top of the baffle;

[0016] The front and rear inner walls of the shell are both fixedly mounted with fixing plates located at the top of the fixing frame, and the bottoms of the two fixing plates are both fixedly mounted with control switches matched with the touch blocks.

[0017] Preferably, the heat dissipation assembly also includes three fixed rings fixedly mounted on the inner bottom wall of the shell, the interiors of the three fixed rings are rotatably mounted with rotating shafts, the outer surfaces of the three rotating shafts are fixedly mounted with pulleys, the three pulleys are connected by belt transmission, and the outer surfaces of the three rotating shafts are fixedly mounted with the fan blades; the drive motor is fixedly mounted on the inner bottom wall of the shell.

[0018] Preferably, one of the rotating shafts is fixedly connected to the output shaft of the driving motor, and the other two rotating shafts are rotatably connected to the inner bottom wall of the shell.

[0019] Preferably, filter cotton plates are installed on the front and rear inner walls of the shell and the surface located at the air inlet.

[0020] Preferably, an installation component is fixedly installed on the outer surface of the shell, and the installation component includes four installation boxes fixedly installed on the outer surfaces of the front and rear sides of the shell, a return spring is fixedly installed on the inner wall of each installation box, a movable plate is slidably installed inside each installation box, and an insertion block extending to the outside of the installation box is fixedly installed at one end of each movable plate, and holes are opened at the four inner corners of the two filter cotton plates.

[0021] Preferably, a slide groove is provided on the outer surface of each installation box, and each movable plate passes through the slide groove and extends to the outside of the installation box, and one end of each movable plate away from the plug block is fixedly connected to one end of the return spring, each plug block extends to the inside of the socket, and each socket is adapted to the plug block.

[0022] Preferably, the air inlet and the ventilation slot are located in the same horizontal plane, and the sizes of the two outlets are matched with the size of the baffle.

[0023] Preferably, the bottoms of the two movable plates are fixedly connected to the tops of the six shape memory alloys, and the two touch blocks are on the same vertical level as the control switch.

[0024] Preferably, the output end of the control switch is electrically connected to the input end of the drive motor through a wire.

[0025] The implementation of the present invention has the following beneficial effects: the present invention achieves efficient and intelligent temperature control by cleverly designing the coordinated work of the ventilation component and the heat dissipation component. When the RF signal attenuator is working, high temperature is generated, and the built-in shape memory alloy expands due to the temperature rise, driving the movable structure and the baffle to move, automatically opening the ventilation path, allowing external air to flow in, and promoting internal heat exchange. At the same time, this action triggers the drive motor to accelerate the rotation of multiple sets of fan blades through the belt drive system, further enhancing the heat dissipation effect and ensuring that the equipment operates stably in a high temperature environment. Conversely, under low temperature conditions, the baffle automatically closes the air inlet to form a sealed environment, effectively blocking the intrusion of humid air, protecting the internal components from moisture erosion, and significantly improving the environmental adaptability and service life of the RF signal attenuator. This design not only achieves precise temperature response and adjustment, but also takes into account the protection and reliability of the equipment, ensuring that the high-precision RF signal attenuator can maintain optimal performance under various working conditions, providing users with a more stable and durable solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a radio frequency signal attenuator according to an embodiment of the present invention.

[0028] Figure 2 The present invention is a schematic diagram of a three-dimensional structure decomposition of a radio frequency signal attenuator according to an embodiment of the present invention.

[0029] Figure 3 It is a partial structural cross-sectional view of an embodiment of the present invention.

[0030] Figure 4 It is a schematic diagram of the partial structure of the ventilation component in an embodiment of the present invention.

[0031] Figure 5 It is a schematic cross-sectional structural diagram of a fixing frame in an embodiment of the present invention.

[0032] Figure 6 Schematic diagram of the three-dimensional structure of the heat dissipation assembly in an embodiment of the present invention.

[0033] Figure 7 It is a schematic cross-sectional structural diagram of an installation component in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following descriptions of the embodiments are with reference to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented. In the description of the present invention, it should be understood that the terms "longitudinal", "length", "circumferential", "front", "rear", "left", "right", "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 invention 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 limiting the present invention.

[0035] Please also refer to Figure 1-7 As shown, an embodiment of the present invention provides a radio frequency signal attenuator, comprising:

[0036] Shell 1;

[0037] A radio frequency attenuator body 3 accommodated in the housing 1;

[0038] A ventilation assembly 7 contained in the housing 1, the ventilation assembly 7 further comprising a shape memory alloy 704 for automatically adjusting air circulation when the temperature inside the housing 1 is too high;

[0039] The heat dissipation assembly 8 accommodated in the housing 1 further comprises a driving motor 802 and fan blades 806 for accelerating air flow when the temperature inside the housing 1 is too high.

[0040] For details, please refer to Figure 1-6 The RF signal attenuator of the embodiment of the present invention specifically includes a shell 1 and a shell cover 2. The shell 1 and the shell cover 2 are installed by fastening bolts 10. The RF attenuator body 3 is fixedly installed inside the shell 1. The input terminal connector 4 and the output terminal connector 5 are fixedly installed at the left and right ends of the shell 1 respectively. The ventilation component 7 and the heat dissipation component 8 are fixedly installed inside the shell 1.

[0041] It should be noted that the RF attenuator body 3 is usually controlled by a microprocessor, which contains a variable resistor network and a digital controller. When the signal passes through the programmable attenuator, the digital controller will receive an instruction and then control the resistance of the variable resistor, thereby adjusting the signal strength to achieve the desired attenuation level.

[0042] The ventilation assembly 7 includes three air inlets 701 on the front and back of the shell 1, fixed frames 702 are fixedly installed on the front and rear inner walls of the shell 1, three ventilation slots 703 are opened on the front and rear outer surfaces of the two fixed frames 702, and no less than six shape memory alloys 704 are fixedly installed on the inner bottom walls of the two fixed frames 702. Movable plates 705 are slidably installed inside the two fixed frames 702, baffles 706 are fixedly installed on the tops of the two movable plates 705, three rectangular slots 707 are opened inside the two baffles 706, touch blocks 708 are fixedly installed on the tops of the two baffles 706, outlets 709 are opened on the top outer surfaces of the two fixed frames 702, fixed plates 710 are fixedly installed on the front and rear inner walls of the shell 1 and located on the tops of the fixed frames 702, and control switches 711 are fixedly installed on the bottoms of the two fixed plates 710.

[0043] Specifically, shape memory alloy 704 has the special ability to change shape when heated and cooled. This alloy deforms at low temperatures and automatically returns to its original shape when heated.

[0044] Specifically, when the RF attenuator body 3 generates high temperature, the temperature inside the shell 1 will increase, and the shape memory alloy 704 will return to its original shape when encountering high temperature, thereby pushing the movable plate 705 and the baffle 706 to move upward, so that the rectangular groove 707, the ventilation groove 703 and the air inlet 701 overlap, thereby achieving the purpose of air circulation in the shell 1.

[0045] Specifically, when the temperature inside the shell 1 is too low, the baffle 706 will block the air inlet 701, and the inside of the shell 1 will be sealed, which can prevent humid air from entering the shell 1 and avoid the components inside the RF attenuator body 3 from being affected by moisture, thereby improving the service life of the RF attenuator body 3.

[0046] The heat dissipation component 8 includes three fixed rings 801 fixedly installed on the inner bottom wall of the shell 1, and a driving motor 802 is fixedly installed on the inner bottom wall of the shell 1. A rotating shaft 803 is rotatably installed inside the three fixed rings 801, and pulleys 804 are fixedly installed on the outer surfaces of the three rotating shafts 803. The three pulleys 804 are connected by belts 805, and fan blades 806 are fixedly installed on the outer surfaces of the three rotating shafts 803.

[0047] Specifically, the rise of the baffle 706 will touch the control switch 711 through the touch block 708, and the drive motor 802 will be started by the control switch 711. The start of the drive motor 802 utilizes the transmission between the pulley 804 and the belt 805 to drive the three sets of fan blades 806 to rotate at the same time, which can accelerate the air flow in the shell 1 and thereby quickly dissipate heat in the shell 1.

[0048] Please also refer to Figure 1-3 and Figure 7 Filter cotton plates 6 are installed on the front and rear inner walls of the shell 1 and the surface located at the air inlet 701, and a mounting assembly 9 is fixedly installed on the outer surface of the shell 1. The mounting assembly 9 includes four mounting boxes 901 fixedly installed on the outer surfaces of the front and rear sides of the shell 1, and a return spring 902 is fixedly installed on the inner wall of each mounting box 901. A movable plate 903 is slidably installed inside each mounting box 901, and an insert block 904 extending to the outside of the mounting box 901 is fixedly installed at one end of each movable plate 903. Plug holes 905 are opened at the four corners inside the two filter cotton plates 6.

[0049] Specifically, the filter cotton plate 6 can prevent external dust and impurities from entering the interior of the shell 1. At the same time, when the filter cotton plate 6 needs to be replaced after long-term use, the four movable plates 903 can be pulled to drive the plug block 904 out of the socket 905 to realize the disassembly of the filter cotton plate 6.

[0050] Specifically, since the operating frequency of the RF attenuator body 3 ranges from DC to 3 GHz, in order to prevent spatial loss of RF energy during transmission, the shell 1 structure of the RF attenuator is required to be made of alloy material, and the processing accuracy must be precise to perform high-precision RF attenuator body 3 mold opening.

[0051] Specifically, the RF attenuator body 3 is used to simulate the transmission characteristics of a broadband carrier channel. The attenuation is set to simulate the length of the transmission path. The working frequency band is about 0M to 100M. Corresponding processing is required in the selection of RF components, PCB board processing technology, and cavity structure. When arranging the PCB, all impedance, ground capacitance and other RF parameters are arranged after EDA simulation; in order to ensure that the attenuation values ​​at each level are normal and the total attenuation after accumulation is accurate, and there will be no signal feedback, strong electrical isolation is used between each level of attenuation circuits to ensure shielding effect; the system software adopts a four-layer architecture of "UI layer + SI layer + PD layer + DM layer".

[0052] In summary, the RF signal attenuator of the embodiment of the present invention is provided with a ventilation component 7 and a heat dissipation component 8. When the RF attenuator body 3 generates high temperature, the temperature inside the shell 1 will increase, and the shape memory alloy 704 will expand when encountering high temperature. Therefore, the shape memory alloy 704 pushes the movable plate 705 and the baffle 706 to move upward, so that the rectangular groove 707, the ventilation groove 703 and the air inlet 701 overlap, and the purpose of air circulation is achieved in the shell 1. The rise of the baffle 706 will touch the control switch 711 through the touch block 708, and the drive motor 802 is started through the control switch 711. The start of the drive motor 802 utilizes the transmission between the pulley 804 and the belt 805 to drive the three sets of fan blades 806 to rotate at the same time, which can accelerate the air flow in the shell 1, and then quickly dissipate heat in the shell 1.

[0053] Furthermore, by providing the ventilation assembly 7 and the heat dissipation assembly 8, when the temperature inside the shell 1 is too low, the baffle 706 will block the air inlet 701 and the inside of the shell 1 will be sealed, thereby preventing humid air from entering the shell 1 and preventing the components inside the RF attenuator body 3 from being affected by moisture, thereby increasing the service life of the RF attenuator body 3.

[0054] It can be seen from the above description that compared with the prior art, the beneficial effect brought by the embodiment of the present invention is that the present invention achieves efficient and intelligent temperature control by cleverly designing the coordinated work of the ventilation component and the heat dissipation component. When the RF signal attenuator is working, high temperature is generated, and the built-in shape memory alloy expands due to the temperature rise, driving the movable structure and the baffle to move, automatically opening the ventilation path, allowing external air to flow in, and promoting internal heat exchange. At the same time, this action triggers the drive motor to accelerate the rotation of multiple sets of fan blades through the belt drive system, further enhancing the heat dissipation effect and ensuring that the equipment operates stably in a high temperature environment. On the contrary, under low temperature conditions, the baffle automatically closes the air inlet to form a sealed environment, effectively blocking the intrusion of humid air, protecting the internal components from moisture erosion, and significantly improving the environmental adaptability and service life of the RF signal attenuator. This design not only achieves precise temperature response and adjustment, but also takes into account the protection and reliability of the equipment, ensuring that the high-precision RF signal attenuator can maintain optimal performance under various working conditions, and providing users with a more stable and durable solution.

[0055] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A radio frequency signal attenuator, characterized in that: include: case; a radio frequency attenuator body accommodated in the housing; a ventilation assembly housed in the housing, the ventilation assembly further comprising a shape memory alloy for automatically regulating air circulation when the temperature inside the housing is too high; A heat dissipation component is accommodated in the shell, and the heat dissipation component further includes a driving motor and fan blades, which are used to accelerate air flow when the temperature inside the shell is too high.

2. The radio frequency signal attenuator according to claim 1, characterized in that: The ventilation assembly also includes: Air inlets are respectively provided on the front and back of the housing; A fixing frame is fixedly mounted on the inner wall of the housing, and a plurality of shape memory alloys are fixedly mounted on the inner bottom wall of the fixing frame; ventilation slots are provided on the outer surfaces of both the front and rear sides of the fixing frame; and an outlet is provided on the outer surface of the top of the fixing frame; A movable plate is slidably installed inside the fixed frame; A baffle fixedly mounted on the top of the movable plate; A touch block fixedly mounted on the top of the baffle; The front and rear inner walls of the shell are both fixedly mounted with fixing plates located at the top of the fixing frame, and the bottoms of the two fixing plates are both fixedly mounted with control switches matched with the touch blocks.

3. The radio frequency signal attenuator according to claim 2, characterized in that: The heat dissipation assembly also includes three fixed rings fixedly mounted on the inner bottom wall of the shell, the interior of the three fixed rings are all rotatably mounted with rotating shafts, the outer surfaces of the three rotating shafts are all fixedly mounted with pulleys, the three pulleys are connected by belt transmission, and the outer surfaces of the three rotating shafts are all fixedly mounted with the fan blades; the drive motor is fixedly mounted on the inner bottom wall of the shell.

4. The radio frequency signal attenuator according to claim 3, characterized in that: One of the rotating shafts is fixedly connected to the output shaft of the driving motor, and the other two rotating shafts are rotatably connected to the inner bottom wall of the shell.

5. The radio frequency signal attenuator according to claim 2, characterized in that: Filter cotton plates are installed on the front and rear inner walls of the shell and the surface located at the air inlet.

6. The radio frequency signal attenuator according to claim 5, characterized in that: A mounting assembly is fixedly installed on the outer surface of the shell, and the mounting assembly includes four mounting boxes fixedly installed on the outer surfaces of the front and rear sides of the shell, a return spring is fixedly installed on the inner wall of each mounting box, a movable plate is slidably installed inside each mounting box, and an insertion block extending to the outside of the mounting box is fixedly installed at one end of each movable plate, and holes are provided at the four inner corners of the two filter cotton plates.

7. The radio frequency signal attenuator according to claim 6, characterized in that: A slide groove is provided on the outer surface of each installation box, and each movable plate passes through the slide groove and extends to the outside of the installation box, and one end of each movable plate away from the plug block is fixedly connected to one end of the return spring, each plug block extends to the inside of the socket, and each socket is adapted to the plug block.

8. The radio frequency signal attenuator according to claim 2, characterized in that: The air inlet and the ventilation slot are located in the same horizontal plane, and the sizes of the two outlets are matched with the size of the baffle.

9. The radio frequency signal attenuator according to claim 2, characterized in that: The bottoms of the two movable plates are fixedly connected to the tops of the six shape memory alloys, and the two touch blocks are on the same vertical level as the control switch.

10. The radio frequency signal attenuator according to claim 3, characterized in that: The output end of the control switch is electrically connected to the input end of the drive motor through a wire.

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