CN205193114U - Dielectric filter test fixture - Google Patents

Abstract

A dielectric filter test fixture described in the utility model, which includes a radio frequency adapter; Two identical through-holes are set at the corresponding positions on the printed circuit board, and a spring-equipped push rod is arranged in the through-hole, and there is a gap between the top of the spring-equipped push rod and the thin copper shrapnel; between the base and the clamp body There is a gap between them, and two through holes are arranged at corresponding positions inside the base and the clamp body, and a mandrel equipped with a spring is arranged in each of the two through holes, and the mandrel is connected with the clamp body. The beneficial effect of the utility model is that, because a buffer device is provided in the clamp body, the dielectric filter can be prevented from being damaged due to the pressure exerted by an external pressing block, and the service life of the test fixture can also be prolonged.

Description

A dielectric filter test fixture

technical field

The utility model relates to a dielectric filter test fixture.

Background technique

In the field of microwave radio frequency, dielectric filter is a commonly used component. With the development of the communication manufacturing industry, various dielectric filter manufacturers have strengthened the control of production costs. The existing situation is that dielectric filters of different sizes correspond to different test fixtures, which increases the production cost of the enterprise. Generally, when testing the electrical properties of dielectric filters, especially for testing dielectric filters with few cavities and small sizes, most of them use the method of soldering pins on the printed circuit board of the test fixture or welding thin copper shrapnel at the same time, because there is no buffer device in the test fixture , it has the following problems: 1. The contact between the measured body and the pins on the printed circuit board is poor; 2. If the thin copper shrapnel is welded, the grounding of the measured body is poor or the thin copper shrapnel is severely bent and deformed and cannot be tested; Three, when the object under test is pressed by an external compact, there is a risk of damaging the dielectric filter.

Utility model content

The purpose of this utility model is to provide a dielectric filter test fixture, which is provided with a buffer device inside the fixture body, which can prevent the dielectric filter from being damaged due to pressure from the external pressure block, and also prolong the service life of the test fixture.

The utility model is achieved in this way. The dielectric filter test fixture includes a radio frequency adapter; There are two identical through-holes at the corresponding positions on the base, the clip body and the printed circuit board, and a spring-equipped push rod is arranged in the through-hole, and there is a gap between the top of the spring-equipped push rod and the thin copper shrapnel; There is a gap between the base and the clamp body, and two through holes are arranged at corresponding positions inside the base and the clamp body, and a mandrel equipped with a spring is respectively arranged in the two through holes, and the mandrel is connected with the clamp body.

In order to make the clamp body have a better buffering effect, the gap between the top of the spring-equipped push rod and the thin copper shrapnel in the utility model is 1.3 mm; the gap between the base and the clamp body is 1.5 mm.

The beneficial effect of the utility model is that, because a buffer device is provided in the clamp body, the dielectric filter can be prevented from being damaged due to the pressure exerted by an external pressing block, and the service life of the test fixture can also be prolonged.

Description of drawings

Fig. 1 is a top view of the utility model.

Fig. 2 is a sectional view AA of Fig. 1 .

Fig. 3 is a sectional view BB of Fig. 1 .

In the figure: 1. RF adapter, 2. Base, 3. Clamp body, 4. Printed circuit board, 5. Thin copper shrapnel, 6. Limiting plate, 7. Ejector rod with spring, 8. Spring Mandrel, 9. screw, 10. cover plate.

detailed description

A dielectric filter test fixture described in the utility model, as shown in Figures 1, 2, and 3, includes a radio frequency adapter 1; a base 2, a clamp body 3, a printed circuit board 4, a thin copper shrapnel 5, and a limit plate 6 Arranged in sequence from bottom to top, two identical through-holes are set at corresponding positions on the base 2, clamp body 3, and printed circuit board 4, and a spring-equipped push rod 7 is arranged in the through-hole, and a spring There is a gap between the top of the ejector rod 7 and the 5 thin copper bullets; there is a gap between the base 2 and the clamp body 3, and two through holes are set at the corresponding positions inside the base 2 and the clamp body 3, and the two through holes A spring-equipped mandrel 8 is provided in each hole, and the spring-equipped mandrel 8 is connected with the clip body 3 . In order to make the clamp body have a better cushioning effect, the gap between the top of the spring-equipped push rod 7 and the thin copper shrapnel 5 in the utility model is 1.3mm; the gap between the base 2 and the clamp body 3 1.5mm. Also marked screw 9, cover plate 10 among the figure.

The specific operation mode of the utility model: the radio frequency adapter is connected with the test network analyzer, and the measured body is directly placed on the thin copper shrapnel in the printed circuit board, and is positioned with a limit plate. When the object to be tested is pressed by an external pressure block, the clamp body will descend through the mandrel equipped with a spring, which has a buffering effect. At the same time, the ejector rod equipped with a spring rises to withstand the thin copper shrapnel, ensuring good contact between the measured object and the thin copper shrapnel. When the external pressure is over, the thin copper shrapnel returns to its original shape, avoiding the scrapping due to poor contact caused by severe bending and deformation of the thin copper shrapnel. The utility model can reasonably select different printed circuit boards and clip bodies for testing according to different dielectric filters with few cavities and small sizes.

The utility model has the advantages of convenient measurement, improved test efficiency, improved service life of the test fixture, and greatly reduces the risk of crushing the dielectric filter.

Claims (3)

1. A dielectric filter test fixture, which includes a radio frequency adapter; a base, a clamp body, a printed circuit board, a thin copper shrapnel, and a limit plate are arranged in sequence from bottom to top, and it is characterized in that: in the base, the clamp body 1. There are two identical straight-through holes on the corresponding positions on the printed circuit board, and a spring-equipped ejector rod is arranged in the through-hole, and there is a gap between the top of the spring-equipped ejector rod and the thin copper shrapnel; the base and the clip body There is a gap between them, and two through holes are arranged at corresponding positions inside the base and the clamp body, and a mandrel equipped with a spring is respectively arranged in the two through holes, and the mandrel is connected with the clamp body. 2 . The dielectric filter test fixture according to claim 1 , wherein the gap between the top of the spring-equipped push rod and the thin copper shrapnel is 1.3 mm. 3 . 3. A dielectric filter test fixture according to claim 1, characterized in that: the gap between the base and the fixture body is 1.5mm.