DUAL-MODE CONDUCTOR-LOADED CAVITY FILTERS

A new class of dual-mode filters consisting of cylindrical-waveguide c avities loaded with perfect conducting cylindrical disks is presented, Resonant frequencies, fields, and the unloaded Q of the resonator are rigorously analyzed by mode-matching techniques, A complete set of da ta for filter design is given, The results show that the resonator has high unloaded Q and good spurious performance, The accuracy of the co mputed results are confirmed by comparison with the experimental data, An eight-pole elliptic-function filter for PCS applications was desig ned, constructed, and tested; excellent frequency response of the filt er with wide spurious-free performance was obtained, which verifies th e theory.