Title :
Computer-aided design of circular ridged waveguide evanescent-mode bandpass filters using the FDTLM method
Author :
Huang, J. ; Vahldieck, R. ; Jin, H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
The analysis and design of a circular ridged waveguide evanescent mode bandpass filter are described. Two and three resonators filters are presented for the 30 GHz range. Insertion loss is typically below 1 dB and return loss is better than 20 dB, on the average. The full-wave FDTLM (frequency-domain transmission line matrix) method is used to compute the generalized S-parameters of the overall filter structures including the effect of finite metalization thickness and model interaction between filter discontinuities. A comparison to other filter structures in circular waveguides shows excellent agreement between measured and computed results.<>
Keywords :
S-parameters; circuit CAD; circular waveguides; finite difference methods; microwave filters; 30 GHz; FDTLM method; circular ridged waveguide; circular waveguides; evanescent-mode bandpass filters; filter discontinuities; finite metalization thickness; generalized S-parameters; insertion loss; model interaction; return loss; Band pass filters; Convergence; Design automation; Matched filters; Metallization; Rectangular waveguides; Resonator filters; Transmission line matrix methods; Waveguide discontinuities; Waveguide junctions;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276780
