Title :
A new type of annular ring waveguide cavity for resonator and filter applications
Author :
Chien-Hsun Ho ; Kai Chang
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A new type of annular ring waveguide cavity has been developed as a waveguide component for the design of resonators, filters, and multiplexers, H-plane and E-plane annular ring waveguide cavities have been investigated thoroughly as regular and forced mode resonators. A dual resonant mode filter using a single H-plane annular ring waveguide cavity has been built with a bandwidth-center-frequency ratio of 0.77%, a stopband attenuation of more than 40 dB, and a sharp gain slope transition. Another dual resonant mode filter which was formed by cascading two E-plane annular ring waveguide cavities has also been fabricated with a bandwidth-center-frequency ratio of 1.12%, a stopband attenuation of 60 dB, a mode purity of 2 GHz around the centre frequency of 26.82 GHz, and a sharp gain slope transition. Electronically tuned resonators are also discussed.<>
Keywords :
cavity resonators; microwave filters; tuning; waveguide components; 26.82 GHz; 40 dB; 60 dB; E-plane; H-plane; H-plane annular ring waveguide cavity; SHF; annular ring waveguide cavity; bandwidth-center-frequency ratio; dual resonant mode filter; electronic tuning; filters; forced mode resonators; mode purity; multiplexers; resonators; sharp gain slope transition; stopband attenuation; waveguide component; Circuits; Coaxial components; Feeds; Planar waveguides; Rectangular waveguides; Resonance; Resonant frequency; Resonator filters; Waveguide components; Waveguide transitions;
Conference_Titel :
Microwave Symposium Digest, 1992., IEEE MTT-S International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-0611-2
DOI :
10.1109/MWSYM.1992.188247
