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Investigation of multiple rectangular aperture irises in rectangular waveguide using TEmnx-modes

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2 Author(s)
Yang, R. ; Arbeitsbereich Hochfrequenztech., Tech. Univ. Hamburg-Harburg, Germany ; Omar, A.S.

With the use of proper aperture basis functions in conjunction with the moment method and TEmnx-modal expansion, the coupling effect of transverse irises with multiple rectangular coupling apertures in a rectangular waveguide has been investigated. Numerical studies carried out for twin- and triple-aperture coupling irises have been confirmed by the experiments. The simulation result for a Ka-band bandpass filter realized with triple-aperture irises gives a higher stop-band attenuation than that of a filter with single-aperture irises. The use of TEmnx-modal expansion is characterized by the reduction of both computer memory and CPU time requirements during the numerical study as compared with the commonly used TEmn-TMmn modal approach

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:41 ,  Issue: 8 )

Date of Publication:

Aug 1993

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