New efficient and robust automated design strategy for H plane direct-coupled-cavities filters with dielectric resonators

The use of dielectric resonators in waveguide microwave communications filters is increasing due to the important reductions on mass and volume (about 50%) and additional thermic stability for high power applications. In this paper a new design strategy for H plane coupled-cavities filters with circular dielectric resonators is presented which makes use of segmentation, hybridization of fast optimization algorithms, and two different simulators with different accuracy and speed. The design process has been successfully applied to the design of filters at different frequency bands, with different number of cavities and dielectric permittivities, thus proving the robustness, efficiency, and validity of the new design strategy