Bidirectionally adjustable cross-coupling structure

Abstract

The invention discloses a bidirectionally adjustable cross-coupling structure. According to the scheme of the invention, a coupling metal post and a metal sleeve that is sleeved on the coupling metalpost are coupled with a resonator; the adjustment of a low-end frequency range or a high-end frequency range of a coupling passband is realized by adjusting the length of the side wall of the metal sleeve and the spacing between the metal sleeve and the coupling metal post in the diameter direction, and thus a bidirectional adjustment function can be played. According to the coupling structure disclosed by the invention, the defects of small coupling area and small coupling strength adjustment range in the prior art can be solved in a simple manner, and the adjustable range of the coupling area and the coupling strength between a coupling component and a resonant rod can be greatly increased. And meanwhile, the coupling structure disclosed by the invention is simple in structure and low inimplementation cost, can be widely applied in communication front-end equipment components such as duplexers, combiners, filters and the like, and has high promotion and application value.

Description

technical field [0001] The invention relates to the field of microwave devices, in particular to a two-way adjustable cross-coupling structure. Background technique [0002] Duplexers, combiners, filters, etc. are widely used in front-end equipment in the communication field, and the parameters of these communication front-end equipment components will directly affect the communication quality of the entire communication system. In order to meet some technical specifications such as: capacitive cross-coupling, tap coupling, volume, weight, technical indicators, etc., during the design process of product components, coupling components will be used for non-contact or contact coupling with the resonant rod main rod in the product components. [0003] The capacitive cross-coupling structure usually uses a rod-shaped resonant rod, and the metal coupling part (usually a dumbbell-shaped or L-shaped metal sheet) is placed on the side of the resonant rod to couple with the resonant ...

AI Technical Summary

Problems solved by technology

The above coupling methods require a variety of components to achieve their performance

Moreover, the above-mentioned coupling method has a small adjustable range. For some high-demand products, the above-mentioned coupling method cannot meet the actual required accuracy, resulting in unsatisfactory product specifications and poor performance.

[0004] In addition, for the above coupling methods, capacitive coupling can basically only suppress the low end of the passband, and inductive coupling can basically only suppress the high end of the passband.

Existing coupling methods cannot achieve two-way coupling

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