Substrate integrated waveguide (SIW) electronic speed controller resonance unit with variable passing band number

Abstract

The invention relates to the microwave circuit technology, in particular to a substrate integrated waveguide (SIW) electronic speed controller resonance unit with a variable passing band number. The electronic speed controller resonance unit comprises a microstrip line and an SIW body, wherein the input end of the microstrip line has 50 ohm characteristic impedance, the microstrip line goes to a coplanar waveguide part through an impedance tapered line, the SIW body is in axial symmetry in the direction of a central conductor strip of the coplanar waveguide part, the unilateral shape of the SIW body is a cross, six rectangular protruding parts are formed by the whole SIW body, the inner side of each rectangular protruding part is provided with a row of circular nonmetal through holes, the SIW body is divided into eight rectangular cavities through the nonmetal through holes, the central conductor strip of the coplanar waveguide part and peripheral metal through holes of the SIW body, and the eight rectangular cavities comprise two big cavities, two medium cavities and four small cavities according to sizes. Two groove lines are formed in printed boards of the big cavities in the electromagnetic wave propagation direction. The SIW electronic speed controller resonance unit is simple in structure, and the resonance passing band number can be freely switched.

Description

technical field [0001] The patent of the present invention relates to microwave circuit technology, especially a substrate integrated waveguide (Substrate Integrated Waveguide, SIW) electronically tuned resonant unit with a variable number of passbands. technical background [0002] With the development of electronic communication technology, high-integration and multi-passband devices play an increasingly important role in practical engineering, and multi-passband and adjustable passband devices are an important direction for component research. The SIW filter has the advantages of good frequency selection characteristics, small insertion loss, high operating frequency, easy integration, and low cost. It is the focus and hot spot of research in recent years. A lot of theoretical research and engineering applications have been done at home and abroad. A single SIW resonant cavity can constitute a resonant unit, which can resonate at a predetermined operating frequency, but t...

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Problems solved by technology

[0004] But for a certain resonator, only single or multiple resonant frequencies can be achieved, and the two cases cannot be switched to each other

In the literature reported so far, no electronically tuned resonators with freely switchable resonant passband numbers have been seen.

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