Title :
CAD of T-septum waveguide evanescent-mode filters
Author :
Labay, Vladimir A. ; Bornemann, Jens
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
fDate :
4/1/1993 12:00:00 AM
Abstract :
A mode-matching-based design for an evanescent-mode waveguide filters with T-septum shaped metal inserts is presented. Owing to the wideband characteristics of the T-septum waveguide, the proposed design constitutes a significant improvement over common evanescent-mode filters with respect to both size reduction and stopband behavior. The theoretical approach is verified for the example of a three-resonator 8.8-GHz filter prototype of less than 3/4-in length. The second passband is beyond 27 GHz. Since the design procedure takes higher-order mode interactions into account, good agreement between theory and experiment is obtained over the entire measurement range between 8.2 and 40 GHz
Keywords :
CAD; electronic engineering computing; microwave filters; passive filters; resonators; waveguide components; 8.2 to 40 GHz; CAD; SHF; T-septum waveguide; computer aided design; evanescent-mode filters; higher-order mode interactions; mode-matching-based design; shaped metal inserts; size reduction; stopband behavior; wideband characteristics; Cutoff frequency; Design automation; Fasteners; Light scattering; Passband; Prototypes; Rectangular waveguides; Resonator filters; Transmission line matrix methods; Wideband;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
