Design of a Q-band Quasi-elliptic E-plane Filter based on Liquid Crystal Polymer

A Q-band 4-pole quasi elliptic E-plane waveguide filter is designed and simulated. Filter circuit is based on liquid crystal polymer substrate so that the better fabrication tolerances can be achieved through lithography at Q-band frequency along with thermal control that liquid crystal polymers can provide due to the availability of broad range of material thermal coefficient of expansion (TCE). TE101 and TE102 modes have been utilized for the realization of quasi elliptic band pass filter response. Sensitivity analysis for dimensional tolerances in resonator dimensions is presented.