Welding-free clamp for impedance matching debugging

Abstract

The welding-free clamp comprises a base, four corners of the top of the base are in threaded connection with supporting rods through first nuts, the outer walls of the supporting rods are in inserted connection with universal arms, and the outer walls of the supporting rods are in threaded connection with two second nuts. The two second nuts are located above and below the universal arm respectively, an opening is formed in the inner wall of one end of the universal arm, components such as a capacitor and an inductor used for impedance matching debugging are pressed on a circuit board, so that signals of the circuit board can pass through normally, and the impedance matching debugging efficiency is improved. A vector network analyzer can be used for testing, that is, components such as a capacitor and an inductor are welded on a circuit board, so that a welding process is omitted, the components such as the capacitor and the inductor are welded on the circuit board when a proper numerical value is found, and generally, only one-time welding is needed in the whole matching process.

Description

Technical Field

[0001] The utility model relates to impedance matching and debugging equipment, in particular to a welding-free clamp used for impedance matching and debugging. Background Art

[0002] In the RF field, impedance matching needs to be considered when connecting different modules, because different modules or components have different impedances. Only when the impedances of two modules or components are the same or close can the system work properly. If the impedances do not match, it will greatly affect the system operation, or even stop the system from working. In more serious cases, it will damage the modules or components, so impedance matching is required. Impedance matching requires many tools or instruments, such as soldering irons and vector network analyzers. Impedance matching is divided into many situations. At lower frequencies, concentrated parameter components, such as capacitors and inductors, can be used. In general, a soldering iron is required to solder components such as capacitors and inductors to the circuit board, and then Connecting the vector network analyzer for testing is an iterative process. It is necessary to weld capacitors or inductors of different values ​​to control the impedance of the circuit to around 50 ohms. When performing impedance matching welding debugging, repeated welding and disassembly are required. The process wastes time and the circuit board needs to be replaced. At the same time, repeated welding will also make the appearance of the circuit board ugly. It is not convenient to flexibly install and disassemble capacitors or inductors of different values ​​when debugging capacitors and inductors. When performing impedance matching debugging, after welding the components, if the impedance matching result is not good, it means that the capacitors, inductors and other components just welded need to be removed and new capacitors, inductors and other components need to be welded. This process is very time-consuming and inconvenient for repeated testing. Utility Model Content

[0003] The purpose of the utility model is to provide a welding-free fixture for impedance matching and debugging, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A welding-free fixture for impedance matching and debugging comprises a base, wherein the four corners of the top of the base are threadedly connected to a support rod through first nuts, the outer wall of the support rod is plugged into a universal arm, the outer wall of the support rod is threadedly connected to two second nuts, the two second nuts are respectively located above and below the universal arm, an opening is provided on the inner wall of one end of the universal arm, a circuit board is fixedly installed on the outer wall of the top of the base, an electrical component is fixedly installed on the outer wall of the top of the circuit board, a telescopic rod is provided above the electrical component, and the outer wall of the telescopic rod is sleeved and connected to the opening of the inner wall of the universal arm.

[0006] In a preferred embodiment of the present invention, the outer wall of the telescopic rod is rotatably connected to the opening at the end of the universal arm, and the telescopic rod moves in a vertical direction to control and adjust the distance between the bottom end of the telescopic rod and the base.

[0007] In a preferred embodiment of the present utility model, the middle of the universal arm is a hollow structure, and the rotation radius of the universal arm is larger than the projection area of ​​the base.

[0008] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention.

[0009] The capacitors, inductors and other components used for impedance matching and debugging are placed on the circuit board so that the circuit board signal can pass normally and can be tested with a vector network analyzer. This is equivalent to soldering the capacitors, inductors and other components on the circuit board, thus eliminating the soldering process. When the appropriate values ​​are found, the capacitors, inductors and other components are soldered to the circuit board. Generally, the entire matching process only requires one soldering. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0011] Figure 1 It is a schematic diagram of the main structure of a welding-free fixture used for impedance matching debugging;

[0012] Figure 2 A schematic diagram of a top view structure of a welding-free fixture used for impedance matching debugging;

[0013] Figure 3 A schematic diagram of the decomposed structure of a welding-free fixture for impedance matching debugging;

[0014] Figure 4 A perspective structural diagram of a welding-free fixture used for impedance matching debugging.

[0015] In the figure: base 1, support rod 2, universal arm 3, telescopic rod 4, electrical parts 5, circuit board 6. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] Example 1: Figure 1 and 2 , including a base 1, the four corners of the top of the base 1 are threadedly connected to the support rod 2 through the first nuts, the outer wall of the support rod 2 is plugged into the universal arm 3, the outer wall of the support rod 2 is threadedly connected to two second nuts, the two second nuts are respectively located above and below the universal arm 3, an opening is opened on the inner wall of one end of the universal arm 3, a circuit board 6 is fixedly installed on the outer wall of the top of the base 1, an electrical component 5 is fixedly installed on the outer wall of the top of the circuit board 6, a telescopic rod 4 is arranged above the electrical component 5, and the outer wall of the telescopic rod 4 is sleeved and connected with the opening of the inner wall of the universal arm 3.

[0018] The specific usage scenario of this embodiment is: the electrical component 5 is a component such as a capacitor and an inductor, and a circuit board 6 is set to be used in conjunction with components such as capacitors and inductors to find suitable capacitance and inductance values. The telescopic rod 4 is set to control the distance between the components such as capacitors and inductors, so as to check the capacitance and inductance values. The circuit board that needs to be impedance matched needs to be fixed on a welding-free test fixture. When the welding-free test fixture is assembled together, the circuit board can be fixed on the base 1.

[0019] Example 2: Figure 1 and Figure 2 The outer wall of the telescopic rod 4 is connected to the open rotating thread at the end of the universal arm 3. The telescopic rod 4 moves in the vertical direction to control and adjust the distance between the bottom end of the telescopic rod 4 and the base 1. The middle of the universal arm 3 is a hollow structure, and the rotation radius of the universal arm 3 is larger than the projection area of ​​the base 1.

[0020] The specific usage scenario of this embodiment is: by setting the rotation radius of the universal arm 3 to be larger than the projection area of ​​the base 1, it is convenient to flexibly adjust the telescopic rod 4 to move to any position above the circuit board 6 through the universal arm 3, so as to fully cover the surface of the circuit board 6.

[0021] The working principle of the utility model is as follows: when in use, a person skilled in the art first installs the bottom of the support rod 2 at the four corners of the top of the base 1 through a first nut threaded connection, then threading the first second nut on the outer wall of the support rod 2, and then sleeve-installing the universal arm 3 on the outer wall of the support rod 2. The opening at the end of the universal arm 3 is M3 or M4, or a suitable screw opening is rotated according to the size of the component. The inner wall of the opening is provided with a thread, and the telescopic rod 4 is threadedly connected to the inner wall of the opening of the inner wall of the universal arm 3. By adjusting the connection height of the telescopic rod 4 on the inner wall of the universal arm 3, the telescopic rod 4 can be connected to the inner wall of the opening of the universal arm 3. The telescopic rod 4 can be conveniently and flexibly controlled to adjust the distance between the telescopic rod 4 and the base 1, so that the telescopic rod 4 can move up and down above the base 1, and the circuit board 6 is installed on the top of the base 1, and then the components such as capacitors and inductors are pressed on the top of the circuit board 6, so that the circuit board signal can pass normally and can be tested with a vector network analyzer, which is equivalent to welding components such as capacitors and inductors on the circuit board, so the welding process is eliminated. When the appropriate values ​​are found, the capacitors and inductors are welded on the circuit board. Generally, the entire matching process only requires one welding.

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

Claims

1. A welding-free fixture for impedance matching and debugging, comprising a base (1), wherein the four corners of the top of the base (1) are threadedly connected to a support rod (2) through a first nut, wherein: The outer wall of the support rod (2) is plug-connected to the universal arm (3), and the outer wall of the support rod (2) is threadedly connected to two second nuts, which are respectively located above and below the universal arm (3). An opening is provided on the inner wall at one end of the universal arm (3). A circuit board (6) is fixedly installed on the top outer wall of the base (1), and an electrical component (5) is fixedly installed on the top outer wall of the circuit board (6). A telescopic rod (4) is provided above the electrical component (5), and the outer wall of the telescopic rod (4) is sleeve-connected to the opening of the inner wall of the universal arm (3).

2. A soldering-free fixture for impedance matching and debugging according to claim 1, characterized in that: The outer wall of the telescopic rod (4) is rotatably connected to the opening at the end of the universal arm (3), and the telescopic rod (4) moves in a vertical direction to control and adjust the distance between the bottom end of the telescopic rod (4) and the base (1).

3. A soldering-free fixture for impedance matching and debugging according to claim 1, characterized in that: The middle of the universal arm (3) is a hollow structure, and the rotation radius of the universal arm (3) is larger than the projection area of ​​the base (1).

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