Title :
Rigorous CAD of multiport coupled rectangular waveguide components
Author :
Hauth, W. ; Keller, R. ; Papziner, U. ; Ihmels, R. ; Sieverding, T. ; Arndt, F.
Author_Institution :
ANT Nochrichtentechnik GmbH, AN/EVO36, Gerberstr. 33, D-7150 Backnang, Germany
Abstract :
Based on the simple mode-matching key-building block of the single double-plane step discontinuity, a general modal admittance formulation is presented for the rigorous CAD of longitudinal multi-channel or -aperture coupled rectangular waveguide structures of arbitrary size and location. The theory involves an arbitrary number of rectangular coupling structures, different size and finite thickness of the coupling elements, as well as immediate higher-order mode interaction of all discontinuities. The efficiency of the design method is demonstrated at two new filter examples: a metal insert Ku-band bandstop filter (12-18 GHz, WR-62) with an E-plane bypass waveguide structure, and a low-cost lowloss Ku-band four-aperture iris coupled bandpass filter. The theory is verified by comparison with measured results.
Keywords :
Admittance; Band pass filters; Design automation; Design methodology; Iris; Microwave filters; Rectangular waveguides; Resonator filters; Transmission line matrix methods; Waveguide components;
Conference_Titel :
Microwave Conference, 1993. 23rd European
Conference_Location :
Madrid, Spain
DOI :
10.1109/EUMA.1993.336644