Substrate integrated waveguide microwave tunable filter based on liquid crystal material
A substrate integrated waveguide and liquid crystal material technology, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as impedance mismatch, liquid crystal material leakage, etc., to overcome impedance mismatch, solve impedance mismatch, continuous The effect of tuning the filter response
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[0028] 1. Solve the problem of liquid crystal packaging. The method used is to etch a hollow structure on the intermediate dielectric substrate, and bond the hollow part to the bottom metal carrier through conductive glue to form a groove with the same thickness as the dielectric substrate to accommodate the liquid crystal Then, the top dielectric substrate is glued to the grooved dielectric substrate through conductive glue, thereby realizing the liquid crystal packaging, solving the problem of liquid crystal leakage in the traditional packaging method, and greatly improving the engineering application value;
[0029] 2. Solve the problem of impedance mismatch caused by impedance changes during the tuning process of the liquid crystal device. The method adopted is to transition the substrate integrated waveguide inverted metal layer of the liquid crystal contact part to the coplanar waveguide structure with fixed impedance on the upper layer by means of interlayer via interconne...
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