Filter power divider based on half-mode substrate integrated waveguide

Abstract

The present invention proposes a filter power divider based on half-mode substrate integrated waveguide, which takes the substrate integrated waveguide rectangular cavity and the half-mode substrate integrated waveguide rectangular cavity as the basic resonant unit, and the adjacent rectangular cavities are realized by opening windows Magnetic coupling, open S-shaped slots to realize electrical coupling, there is a jumper isolation resistor between the openings of the second-order half-mode substrate integrated waveguide rectangular cavity, slot lines are set at the corresponding positions between the metal conductive layer on the lower surface and the opening, and the input and output terminals use Microstrip-coplanar waveguide structure. The substrate-integrated waveguide rectangular cavity includes a dielectric substrate whose upper and lower surfaces are covered with metal conductive layers, and the dielectric substrate is evenly distributed along the edge of the cavity with metal through holes penetrating the upper and lower metal conductive layers; the half-mode substrate integrated waveguide rectangular cavity consists of The substrate-integrated waveguide rectangular cavity is obtained by dividing along the magnetic wall. The invention has a compact structure and improves the isolation characteristic and out-of-band suppression performance of the filter power divider.

Description

technical field [0001] The invention relates to microwave passive device technology, in particular to a filter power divider based on half-mode substrate integrated waveguide. Background technique [0002] With the development of microwave and millimeter wave technology, modern communication systems put forward higher requirements on the size of integrated circuits, and the integration and miniaturization of microwave components have become research hotspots and trends in recent years. Filters and power splitters are important components in microwave communication systems. In the pursuit of miniaturization, the integration of filters and power dividers can not only reduce circuit size, reduce processing costs, but also reduce insertion loss, which caters to the development trend of modern integrated circuits. [0003] Substrate integrated waveguide is a new type of microwave and millimeter wave transmission structure proposed in recent years. It has the advantages of high q...

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Problems solved by technology

For example, literature 1 (Wang, X., and Zhu, X.W.: 'Quarter-mode circular cavity substrate integrated waveguide filtering power divider with via-holes perturbation', Electron. Lett., 2017, 53, (6), pp.434–436 ) proposed a filter power splitter based on a substrate-integrated waveguide circular cavity, but the power splitter did not consider the isolation characteristics of the filter, thus limiting the practical application of the filter power splitter

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