Half-mode substrate integrated waveguide liquid crystal adjustable filter with embedded coupling metal wires

Abstract

The invention discloses a half-mode substrate integrated waveguide liquid crystal adjustable filter with embedded coupling metal wires. The filter comprises a half-mode substrate integrated waveguide, the half-mode substrate integrated waveguide comprises a dielectric substrate assembly, the dielectric substrate assembly comprises a first metal layer and a second metal layer arranged opposite to the first metal layer, the first metal layer and the second metal layer are connected through a plurality of metal through holes, the plurality of metal through holes form a through hole array to form a substrate integrated guided electromagnetic wave structure in the dielectric substrate assembly, a double-internal rotation type open-loop resonance structure is etched on the first metal layer, the double-internal rotation type open-loop resonance structure comprises two end points which are symmetrically arranged, and the two end points spirally extend towards the interior of the ring at the same time, so that each edge part of the double internal rotation type open-loop resonance structure at least comprises two etching lines. According to the half-mode substrate integrated waveguide liquid crystal adjustable filter with the embedded coupling metal wires, miniaturization of an existing filter can be achieved, and meanwhile the problem that the working frequency of the filter is fixed and cannot be adjusted is solved.

Description

technical field [0001] The invention relates to the technical field of substrate integrated waveguide, in particular to a half-mode substrate integrated waveguide liquid crystal tunable filter embedded with coupling metal wires. Background technique [0002] Conventional microwave systems typically utilize metal waveguides to transmit electromagnetic waves. Because the metal waveguide structure has a high quality factor, it has the advantage of high operating power capacity and low loss. However, metal waveguides are bulky and costly to process, and there are integration problems in modern microwave systems. Therefore, on this basis, the substrate integrated waveguide technology has been developed. However, since the substrate integrated waveguide is developed based on the metal waveguide, it inherits the characteristics of the traditional metal waveguide, such as low radiation loss, changing operating frequency with the change of the dielectric constant, and large volume....

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Problems solved by technology

[0004] The purpose of the present invention is to provide a half-mode substrate integrated waveguide liquid crystal tunable filter with embedded coupling metal wires, so as to realize the miniaturization of the existing half-mode substrate integrated waveguide liquid crystal tunable filter with embedded coupling metal wires At the same time, it solves the problem that its working frequency is fixed and cannot be adjusted

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