TUNEABLE BAND-PASS MICROWAVE FILTER Russian patent published in 2015 - IPC H01P1/203 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to electronic engineering and specifically to tuneable band-pass microwave filters. The technical result is achieved through a tuneable band-pass microwave filter which comprises two transmission lines with the same wave impedance, one being designed for input of a microwave signal and other for output, at least one resonance link with a Schottky-barrier field-effect transistor, a transmission line section, wherein the gate of the Schottky-barrier field-effect transistor is connected to a dc control voltage source, wherein each resonance link additionally includes two elements, each on two coupled transmission lines, and an inductor.

EFFECT: wider pass band and low voltage standing-wave ratio while maintaining low microwave losses in the pass band of the tuneable band-pass filter.

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