Triple-band dielectric resonator bandpass filters

Abstract

This paper presents a novel triple-band bandpass filter using dielectric loaded resonators that support three operating modes. The proposed design employs dielectric resonators shaped in a way to have independent control of the resonant frequencies of the three modes and to facilitate interresonator coupling. The proposed triple-band dielectric filter offers high Q and is miniature in size in comparison to previously reported multi-band filter designs. To demonstrate the proposed concept a 3 ^rd order C-band triple-band dielectric filter is designed, manufactured, and measured. To the best of authors' knowledge, this is the first triple-band filter realized with dielectric resonators.