Optimization of coaxial dielectric resonator filter with aggressive space mapping

Abstract

This paper introduces a 1/4 wavelength dielectric coaxial resonators as the distributed parameter elements, by a lumped chip capacitor coupled band-pass filter. According to the design of filter technology indicators, determine the type of filter, series, and structure. Then the parallel resonant structure is replaced with a high dielectric constant dielectric coaxial resonator, based on the microwave network theory to calculate the values of the structural parameters of microwave dielectric filter. In microwave filter optimization simulation stage; because the commercial electromagnetic software simulation the cost is huge, filter the whole simulation optimization is a very complicated process. Space mapping method combining circuit optimization speed and electromagnetic simulation accuracy; improve the efficiency of filter design. In the optimization process, we used equivalent circuit model as coarse model in ADS, fine model was simulated in Ansoft HFSS.