Dielectric filter with capacitive coupling structure

Abstract

The invention discloses a dielectric filter with a capacitive coupling structure. The dielectric filter comprises a dielectric filter body and two first blind holes arranged in the surface of the dielectric filter body, wherein each first blind hole and a dielectric filled around the first blind hole form a dielectric resonator, and each first blind hole is used for debugging the resonant frequency of the dielectric resonator; the capacitive coupling structure comprises a groove located between the two dielectric resonators, two second blind holes are formed in the groove bottom of the groove,and the two second blind holes are both shallow blind holes; a conductive layer is plated on the inner wall of each second blind hole, and a strip-shaped through groove is formed in the bottom of thegroove; two ends of the strip-shaped through groove are communicated with the two second blind holes respectively; a connecting belt is arranged in the strip-shaped through groove, and a conductive layer is plated on the surface of the connecting belt; and the conductive layers on the surfaces of the connecting belts are connected with the conductive layers on the inner walls of the two second blind holes respectively. According to the dielectric filter with the capacitive coupling structure, the structure is reasonable, the shallow blind holes are easy to process and form, and the manufacturing process of the capacitive coupling structure is facilitated.

Description

technical field [0001] The invention relates to a dielectric filter with a capacitive coupling structure. Background technique [0002] Modern communication systems require higher and higher filter volumes, and the advantages of dielectric filters in terms of performance and volume are becoming more and more obvious. At present, the structure of realizing capacitive coupling (or negative coupling) in solid dielectric filters is relatively complicated, the process is difficult to realize, and the manufacturing process is relatively cumbersome, which is not conducive to reducing manufacturing costs for enterprises. Contents of the invention [0003] The purpose of the present invention is to provide a dielectric filter with a capacitive coupling structure, which has a reasonable structure, and shallow blind holes are easy to form, which is beneficial to simplify the manufacturing process of the capacitive coupling structure. [0004] In order to achieve the above object, th...

AI Technical Summary

Problems solved by technology

At present, the structure of realizing capacitive coupling (or negative coupling) in solid dielectric filters is relatively complicated, the process is difficult to realize, and the manufacturing process is relatively cumbersome, which is not conducive to reducing manufacturing costs for enterprises.

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