Longitudinal Dual-Mode Filters in Rectangular Waveguide

TitleLongitudinal Dual-Mode Filters in Rectangular Waveguide
Publication TypeConference Paper
Year of Publication2008
AuthorsRuiz-Cruz, J. A., Y. Zhang, J. R. Montejo-Garai, J. M. Rebollar, and K. A. Zaki
Conference Name2008 IEEE MTT-S International Microwave Symposium Digest
Date PublishedJune
KeywordsDual-Mode cavities, elliptic filter response, rectangular waveguide filter
AbstractDual-Mode filters are used in applications where low mass and volume are required. In this paper, the Computer Aided Design of a new rectangular waveguide filter structure is proposed for achieving the dual-mode operation. It preserves the longitudinal inline topology used in the classical circular waveguide configuration, which can provide quasi-elliptic function responses. However, it has no coupling or tuning screws and it is exclusively made up of sections of aligned rectangular waveguides. This leads to a very efficient full-wave analysis based on the Mode-Matching method. The proposed CAD is illustrated with a four order prototype, whose results are compared with other numerical technique.