High-performance radio frequency coaxial load

Abstract

The utility model discloses a high-performance radio frequency coaxial load comprising a housing which is provided with an axially conducted accommodating cavity; the resistor, the center pin and the top cap are coaxially arranged in the containing cavity, the center pin is riveted with one end of the resistor, the top cap is riveted with the other end of the resistor, and the center pin and the top cap are both in interference fit with the resistor; and the connecting piece is embedded in one end of the shell, and the central needle is connected with the connecting piece. According to the high-performance radio frequency coaxial load provided by the utility model, all parts are tightly attached through interference fit, so that the high-performance radio frequency coaxial load has higher assembly consistency and structural stability, the assembly difficulty is remarkably reduced, the production efficiency is improved, and batch manufacturing and quality control are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of coaxial load technology, and specifically to a high-performance radio frequency coaxial load. Background Technology

[0002] Coaxial loads, as key components in radio frequency and microwave systems, are widely used in signal termination matching, power dissipation, and system testing. Their basic function is to effectively absorb radio frequency signals and convert them into heat energy, thereby preventing signal reflection from adversely affecting system performance.

[0003] In existing technologies, soldering or adhesive application is commonly used to achieve electrical connections between the resistor, the top cap, and the center pin. While these processes achieve the basic connection purpose, they also have some significant drawbacks. Soldering is prone to problems such as solder joint cracking, incomplete soldering, or misalignment during high temperatures or thermal cycling, thus affecting electrical performance and heat dissipation efficiency. Adhesive application, on the other hand, faces issues such as adhesive aging, poor thermal conductivity, and poor process consistency, which not only affect the product's lifespan but also increase the complexity of the assembly process and the rework rate.

[0004] To address the aforementioned issues, a new structure and connection method is urgently needed to improve thermal conductivity while ensuring excellent electrical performance and simplifying the assembly process, thereby fundamentally enhancing the reliability and consistency of coaxial loads. Utility Model Content

[0005] To overcome the above shortcomings, the purpose of this utility model is to provide a high-performance radio frequency coaxial load that achieves tight fit between components through interference fit, resulting in higher assembly consistency and structural stability, significantly reducing assembly difficulty, improving production efficiency, and facilitating mass production and quality control.

[0006] Technical solution: This utility model discloses a high-performance radio frequency coaxial load, comprising:

[0007] A housing having an axially communicating receiving cavity;

[0008] A resistor, a center pin, and a top cap are coaxially disposed within the accommodating cavity. The center pin is riveted to one end of the resistor, and the top cap is riveted to the other end of the resistor. Both the center pin and the top cap are interference-fitted with the resistor.

[0009] A connector is embedded at one end of the housing, and the center pin is connected to the connector.

[0010] Furthermore, the outer casing also has several parallel heat sinks.

[0011] Furthermore, it also includes an insulating block, which is embedded in the accommodating cavity, located between the connector and the resistor, and the center pin passes through the insulating block.

[0012] Furthermore, the top cap is interference-fitted with the receiving cavity of the outer shell.

[0013] Furthermore, the outer casing is made of a highly thermally conductive metal.

[0014] Furthermore, the connector is an N-type, SMA-type, or BNC-type coaxial connector.

[0015] The beneficial effects of this utility model are as follows:

[0016] (1) This utility model achieves tight fit between components through interference fit, which has higher assembly consistency and structural stability, significantly reduces assembly difficulty, improves production efficiency, and facilitates mass production and quality control.

[0017] (2) The outer shell is made of a high thermal conductivity metal material and has several parallel heat sinks on the surface, which can significantly improve the overall heat dissipation efficiency and thus improve the service life. Attached Figure Description

[0018] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances. In the drawings:

[0019] Figure 1 This is a cross-sectional view of the coaxial load described in this utility model;

[0020] Figure 2 This is a perspective view of the outer shell described in this utility model.

[0021] In the diagram: 1. Outer shell; 11. Receiving cavity; 12. Heat sink; 2. Resistor; 3. Center pin; 4. Top cap; 5. Connector; 6. Insulating block. Detailed Implementation

[0022] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.

[0024] like Figure 1 and Figure 2 As shown, this utility model discloses a high-performance radio frequency load, comprising:

[0025] The outer casing 1 has an axially communicating receiving cavity 11;

[0026] A resistor 2, a center pin 3, and a top cap 4 are coaxially arranged within the accommodating cavity 11. The center pin 3 is riveted to one end of the resistor 2, and the top cap 4 is riveted to the other end of the resistor 2. Both the center pin 3 and the top cap 4 are interference-fitted with the resistor 2.

[0027] Connector 5 is embedded at one end of the outer shell 1, and the center pin 3 is connected to the connector 5.

[0028] With the above structure, the center pin 3 and the top cap 4 are securely riveted to both ends of the resistor 2 with an interference fit, thereby ensuring the stability of the electrical connection and the reliability of the mechanical structure. The center pin 3 is also connected to the connector 5 embedded at one end of the housing 1, thereby achieving efficient coupling with the external transmission line. The riveting fit between the center pin 3 and the top cap 4 ensures that the resistor 2 can be firmly fixed, effectively avoiding poor contact caused by vibration or eccentricity. At the same time, the coaxial layout ensures good RF transmission performance, reduces the VSWR, and improves the power carrying capacity. In addition, the connector 5 embedded in the housing 1 also enhances the overall structural sealing and mechanical strength.

[0029] Preferably, the housing 1 also has a plurality of parallel heat sinks 12. The heat sinks 12 can extend along the axial direction or perpendicular to the axial direction along the surface of the housing 1, increasing the heat dissipation area of ​​the housing 1. Through heat exchange between the heat sinks 12 and the air, the heat release efficiency of the coaxial load during operation is effectively improved, thereby preventing the resistor 2 from overheating due to carrying high-power radio frequency signals for a long time, improving the thermal stability and operational reliability of the coaxial load, and extending the service life of the coaxial load.

[0030] In this embodiment, the coaxial load also includes an insulating block 6, which is embedded in the accommodating cavity 11, located between the connector 5 and the resistor 2, and penetrated by the center pin 3. While ensuring a reliable connection between the connector 5 and the resistor 2, the insulating block 6 also effectively positions and insulates the center pin 3, preventing electrical faults such as short circuits caused by the center pin 3 shifting or contacting the outer casing 1. The insulating block 6 also improves the mechanical stability of the overall structure, enhances vibration resistance, and further ensures the stability and safety of radio frequency signal transmission.

[0031] In this embodiment, the top cap 4 is installed in an interference fit with the receiving cavity 11 of the outer shell 1, thereby firmly fixing the top cap 4 inside the outer shell 1 and forming a stable mechanical connection. This avoids loosening or displacement caused by vibration, thermal expansion, or mechanical stress during high-frequency, high-power operation. Furthermore, the interference fit helps improve contact thermal conductivity and enhances the efficiency of heat transfer from the internal components to the outer shell 1, thus further improving the overall heat dissipation performance of the coaxial load in conjunction with the heat sink 12. Moreover, the outer shell 1 is made of a high thermal conductivity metal, which significantly improves the heat dissipation capacity of the coaxial load. During operation, the heat generated by the internal resistor 2 due to the radio frequency signal can be quickly conducted to the outside through the high thermal conductivity metal outer shell 1. Combined with the heat sink 12 on the outer shell 1, efficient heat dissipation is achieved, thereby reducing the internal temperature rise of the coaxial load and preventing performance degradation or internal structural damage due to overheating.

[0032] Furthermore, connector 5 is an N-type, SMA-type, or BNC-type coaxial connector, which can be selected according to specific application requirements. N-type connectors are suitable for high-power applications, SMA-type connectors are suitable for high-frequency miniaturized devices, and BNC-type connectors are commonly used in testing and low-to-medium frequency systems, featuring convenient connection and reliable performance. Through the standard interface design, the coaxial load has good versatility and compatibility, facilitating rapid integration and replacement in different transmission lines, thus improving the adaptability of the coaxial load.

[0033] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A high-performance radio frequency coaxial load, characterized in that, include: A housing having an axially communicating receiving cavity; A resistor, a center pin, and a top cap are coaxially disposed within the accommodating cavity. The center pin is riveted to one end of the resistor, and the top cap is riveted to the other end of the resistor. Both the center pin and the top cap are interference-fitted with the resistor. A connector is embedded at one end of the housing, and the center pin is connected to the connector.

2. The high-performance RF coaxial load according to claim 1, characterized in that, The outer casing also has several parallel heat sinks.

3. The high-performance RF coaxial load according to claim 1, characterized in that, It also includes an insulating block, which is embedded in the accommodating cavity, located between the connector and the resistor, and the center pin passes through the insulating block.

4. The high-performance RF coaxial load according to claim 1, characterized in that, The top cap is interference-fitted with the receiving cavity of the outer shell.

5. The high-performance RF coaxial load according to claim 1, characterized in that, The outer casing is made of a highly thermally conductive metal.

6. The high-performance RF coaxial load according to claim 1, characterized in that, The connector is an N-type, SMA-type, or BNC-type coaxial connector.

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