A Coupling Method of Filter

Abstract

The present invention belongs to the technical field of communication, and specifically relates to a coupling method of a filter; S1: Firstly, a coupling groove is evenly opened on the cavity wall of the filter, and the coupling connection structure is movably plugged into the coupling through a plug column. Slot; S2: snap the two arc-shaped clips at both ends of the coupling structure to the outer wall of the resonator provided on both sides of the cavity wall, and make the coupling connecting piece contact with the arc outer wall of the resonator respectively; then The plug-in column is plugged and fixed in the engaging groove; S3: Adjust the position of the coupling connecting piece on the arc-shaped clamping plate through the coupling controller, so that the coupling connecting piece can have different contact surface positions with the outer wall of the resonator, which is convenient for adjusting the resonator The amount of coupling between them; S4: The coupling connection structure installed in the cavity filter is fixed through the cavity cover plate; it can realize the coupling of different values ​​of coupling between resonators, and there is no need to replace other types of coupling The connection structure can perform stable coupling to the coupling amount between the resonators.

Description

technical field [0001] The invention belongs to the technical field of communication, and specifically relates to a filter coupling method. Background technique [0002] With the rapid development of mobile communication, the communication system has higher and higher requirements for communication quality. In order to improve the utilization rate of spectrum resources and prevent signals in the frequency band from being interfered by other signals, the communication system strengthens the suppression of signals in adjacent frequency bands. , so the wireless communication system has higher requirements on the performance of the suppression filter, duplexer and combiner, and the duplexer and combiner are usually composed of coaxial cavity filters. [0003] In order to improve the rejection of the filter, it is usually realized by adding a coupling structure in the coaxial cavity filter. [0004] However, the existing filter coupling methods usually perform coupling operation...

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Problems solved by technology

[0004] However, the existing filter coupling methods usually perform coupling operations according to different types of filters, and at the same time need to perform filter coupling operations according to the setting of the coupling connection structure. When the existing coaxial cavity filter is used for coupling, Since the distance between the outer circular surfaces of the resonators of the cavity filter is different, when the coupling amount of the filter needs to be adjusted, the coupling connection structure needs to be replaced, which not only increases the manufacturing cost of the filter, but also leads to the coupling method the complex phenomenon of

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