CN213240328U - Insertion loss test tool for various thread installation type radio frequency interference filters - Google Patents
Insertion loss test tool for various thread installation type radio frequency interference filters Download PDFInfo
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- CN213240328U CN213240328U CN202021505257.XU CN202021505257U CN213240328U CN 213240328 U CN213240328 U CN 213240328U CN 202021505257 U CN202021505257 U CN 202021505257U CN 213240328 U CN213240328 U CN 213240328U
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Abstract
The utility model discloses a be used for multiple screw thread installation type radio frequency interference filter insertion loss test fixture, mainly include shell and apron and adapter, the shell both ends are provided with input and output respectively, and input and output all include plug and electrically conductive liner, and the plug is fixed with the shell through electrically conductive liner, and the adapter setting is provided with the insulation board respectively in the cavity that shell and apron formed, near input and output in the shell, and it is fixed with the shell that the adhesion agent is passed through to the insulation board bottom, the plug of input and output is connected with the jack through the wire, and the wire both ends are fixed with plug and jack respectively through the solder joint, and the solder joint position that the wire is close to the plug adopts the adhesion agent to fix with. The utility model discloses the simple operation is effective, and the cost is lower, long service life.
Description
Technical Field
The utility model relates to a screw thread installation type radio frequency interference filter, in particular to are used for multiple screw thread installation type radio frequency interference filter insertion loss test fixture.
Background
The thread-mounted radio-frequency interference filter is a C-type, LC-type, pi-type and LCR-type circuit generally composed of one, two or three of a resistor, a capacitor and an inductor, and is a filter with a through structure composed of a central lead and a threaded metal shell. The insertion loss value of the filter reflects the capability of solving the electromagnetic interference, and a production unit can simulate the use environment of a user to manufacture a special test tool for a product and access special test equipment in order to verify the anti-interference capability of the filter. The test fixture comprises a main body part, a cover plate part and a plug part, the traditional test fixture adopts copper, aluminum, iron and stainless steel to manufacture a rectangular cavity with an opening at the upper part, or adopts a metal sheet to be sealed into the cavity as a fixture main body part, one surface (namely an output end) vertical to the opening surface is punched, the test fixture is used for installing an N-type connector (an N-type joint), the test fixture is fastened on the panel of the fixture by using a screw, the N-type head is installed outwards, the joint is used for connecting a network analyzer and used for connecting an N-type connected coaxial cable, a core wire of the N-type head is welded at one end of a conducting wire inside the cavity, the other end of the core wire is used for welding an alligator clip of metal, two current situations exist at the position of the other surface (namely the input end) vertical: 1) processing an internal thread hole matched with the product thread; 2) Processing a rectangular hole and four through holes for mounting screws, processing a metal sheet which is slightly larger than the rectangular hole by adopting a metal material, drilling an internal thread hole on the metal sheet and a screw through hole corresponding to the main body clamp, and mounting the metal sheet matched with the threads of the product on the clamp main body during product testing.
The cover plate part of the test tool is also made of copper, aluminum, iron and stainless steel, or is sealed by a metal sheet to form a cavity which just covers the opening surface of the main body part, so that the main body part and the cover plate part form a complete Faraday cage shield during product test. The traditional technology test tool has the following defects: 1) when a cover plate of the tool is covered on an opening of a main body part, a gap is generated between the cover plate and the main body contact part, interference signals enter a cavity part from the gap, test data are unstable, a test value and an actual value of a product are different, and a tester cannot accurately record the actual value; 2) the coaxial cable with the N-type connector is adopted between the contact tool and the test equipment, one end of the coaxial cable at the input end is usually damaged to meet the test requirements of products, the coaxial cable is split into two paths of welding wires, one wire is used for connecting the center line of the product, and the other end of the coaxial cable is used for connecting the ground of the input end. Thus, certain errors can be generated between the test time and the actual value; 3) the other end of the cavity, which is connected with the center line of the product, is clamped by an alligator clip, so that an electroplated layer on the center line of the product is easily damaged, and the appearance is damaged; 4) after the output end cavity is welded by adopting the lead, the welding point is not effectively fixed, and after a plurality of tests, the lead of the welding point is easy to break due to frequent shaking of the lead, and the welding point can be reworked for a plurality of times. 5) The current situation 1 is adopted at the input end of the main body part, so that a threaded product is matched with a tool, and the universal purpose cannot be realized. The input end of the main body part adopts the current situation 2, the universal use can be realized, but gaps can be generated at the contact part of the metal sheet and the main body, so that the signal leakage is caused, and the four screws are adopted for fastening, so that the disassembly and the assembly are not convenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple operation is effective, and the cost is lower, long service life's the multiple screw thread installation type radio frequency interference filter insertion loss test fixture that is used for.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model discloses a be used for multiple screw thread installation type radio frequency interference filter insertion loss test fixture, including shell and apron, the shell both ends are provided with input and output respectively, and input and output all include plug and electrically conductive liner, and the plug is fixed with the shell through electrically conductive liner, still includes the adapter, and the adapter setting is close to input and output respectively in the cavity that shell and apron formed, and it is fixed with the shell respectively to be close to the input in the shell, and it is fixed with the shell that the gluing agent is passed through to the insulation board bottom, the plug of input and output is connected with the jack through the wire, and the wire both ends are passed through the solder joint and are fixed with plug and jack respectively, and the solder joint.
Preferably, the adapter, the shell and the cover plate are made of one of copper, aluminum, iron and stainless steel.
Preferably, the shell and the cover plate are clamped by a concave-convex structure, and a conductive adhesive tape is arranged between the cover plate and the shell.
Preferably, the inner surfaces of the shell and the cover plate and the surface of the adapter are provided with electroplated layers, and the electroplated layers are one of gold plating, silver plating and nickel plating.
Preferably, the insulating plate is made of one of polytetrafluoroethylene, an epoxy plate and an adhesive plate.
Preferably, the plug is an N-type connector.
Preferably, the adhesive is one of epoxy resin, silicone rubber and silicone gel.
Compared with the prior art, the utility model has the advantages of: the utility model solves the problem that the external interference signal influences the test value when testing the parameters; the shell and the cover plate are clamped by adopting a concave-convex structure, and a conductive adhesive tape is arranged between the cover plate and the shell, so that an interference signal is prevented from entering the cavity through a tiny gap during testing; during testing, different threads can be tested only by replacing the adapter, the operation is convenient and effective, and the cost is reduced; the original use state of the equipment matching cable is not damaged for testing; the lead is fixed on the insulating plate, so that the problem of lead fracture caused by shaking of welding points in multiple tests is avoided; the jack is adopted to connect the central wire of the product, so that the coating layer of the central wire is prevented from being damaged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, the utility model discloses a plug 6 is fixed with shell 1 through electrically conductive liner, adapter 3, shell 1 both ends are provided with input 4 and output 5 respectively, input 4 and output 5 all include plug 6 and electrically conductive liner, plug 6 is fixed with shell 1 through electrically conductive liner, and adapter 3 sets up in the cavity that shell 1 and apron 2 formed, is close to input 4 and output 5 in the shell 1 and is provided with insulation board 11 respectively, and it is fixed with shell 1 that gluing agent 12 is passed through to insulation board 11 bottom, plug 6 of input 4 and output 5 is connected with jack 7 through wire 8, and 8 both ends of wire are fixed with plug 6 and jack 7 respectively through solder joint 9, and 8 solder joint 9 positions that are close to plug 6 of wire 8 adopt gluing agent 12 fixed with insulation board 11.
During the use, select and match adapter 3 with screw thread installation type radio frequency interference filter screw thread, the fastening is on the filter main part corresponds the position, and the product fastening is connected with both ends strip line jack 7 on the screw hole of adapter 3, carries out zero calibration earlier, and the wave form of treating equipment is zero calibration success state, disconnects strip line jack 7 again and connects product center lead wire both ends with both ends jack 7, and input, the output cable of test equipment are connected to plug 6, covers apron 2, alright in order to test like this.
Claims (7)
1. The utility model provides a be used for multiple screw thread installation type radio frequency interference filter insertion loss test fixture, includes shell and apron, and the shell both ends are provided with input and output respectively, and input and output all include plug and electrically conductive liner, and the plug is fixed its characterized in that with the shell through electrically conductive liner: still include the adapter, the adapter setting is provided with the insulation board respectively near input and output in the cavity that shell and apron formed, and it is fixed with the shell that the adhesion agent is passed through to the insulation board bottom, the plug of input and output is connected with the jack through the wire, and the wire both ends are fixed with plug and jack respectively through the solder joint, and the solder joint position that the wire is close to the plug adopts the adhesion agent fixed with the insulation board.
2. The insertion loss test tool for the multiple thread-mounted radio frequency interference filters according to claim 1, characterized in that: the adapter, the shell and the cover plate are made of one of copper, aluminum, iron and stainless steel.
3. The insertion loss test tool for the multiple thread-mounted radio frequency interference filters according to claim 1, characterized in that: the shell and the cover plate are clamped by adopting a concave-convex structure, and a conductive adhesive tape is arranged between the cover plate and the shell.
4. The insertion loss test tool for the multiple thread-mounted radio frequency interference filters according to claim 1, characterized in that: and electroplating layers are arranged on the inner surfaces of the shell and the cover plate and the surface of the adapter, and the electroplating layers adopt one of gold plating, silver plating and nickel plating.
5. The insertion loss test tool for the multiple thread-mounted radio frequency interference filters according to claim 1, characterized in that: the insulation board adopts one of polytetrafluoroethylene, epoxy board, gluing board.
6. The insertion loss test tool for the multiple thread-mounted radio frequency interference filters according to claim 1, characterized in that: the plug adopts an N-type connector.
7. The insertion loss test tool for the multiple thread-mounted radio frequency interference filters according to claim 1, characterized in that: the adhesive is one of epoxy resin, silicon rubber and silicone gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021505257.XU CN213240328U (en) | 2020-07-27 | 2020-07-27 | Insertion loss test tool for various thread installation type radio frequency interference filters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021505257.XU CN213240328U (en) | 2020-07-27 | 2020-07-27 | Insertion loss test tool for various thread installation type radio frequency interference filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213240328U true CN213240328U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021505257.XU Active CN213240328U (en) | 2020-07-27 | 2020-07-27 | Insertion loss test tool for various thread installation type radio frequency interference filters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213240328U (en) |
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2020
- 2020-07-27 CN CN202021505257.XU patent/CN213240328U/en active Active
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