Title :
Ka-band slot-fed higher order-mode low-loss Fabry-Perot filters
Author :
McCleary, James ; Li, Ming-yi ; Chang, Kai
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
7/1/1994 12:00:00 AM
Abstract :
Low-loss bandpass filters consisting of Fabry-Perot resonators excited by slots which couple to higher order resonator modes are demonstrated. For close reflector spacings, the slots efficiently couple power from rectangular waveguide to the TEM400 and TEM300 modes of the resonator. At Ka-band the filters have insertion losses less than 1 dB in general and less than 0.5 dB in some cases. The unloaded Q values of the filters range from 1500 to 3000. The filters are mechanically tunable over a 25% bandwidth
Keywords :
Q-factor; band-pass filters; cavity resonators; losses; microwave filters; passive filters; tuning; waveguide components; 1 dB; 27 to 36 GHz; Fabry-Perot filters; Fabry-Perot resonators; Ka-band; TEM300 mode; TEM400 mode; bandpass filters; higher order-mode; low-loss type; mechanically tunable filters; reflector spacings; slot-fed filters; Band pass filters; Dielectrics; Fabry-Perot; Frequency; Insertion loss; Optical coupling; Oscillators; Rectangular waveguides; Resonator filters; Submillimeter wave filters;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
