E and H-plane wide-band ridge waveguide couplers

TitleE and H-plane wide-band ridge waveguide couplers
Publication TypeJournal Article
Year of Publication2008
AuthorsFahmi, M. M., J. A. Ruiz-Cruz, and K. A. Zaki
JournalInternational Journal of RF and Microwave Computer-Aided Engineering
Date PublishedJuly
Keywordsfull-wave, LTCC, mode matching, optimization, ridge waveguide
AbstractA systematic synthesis procedure for ridge waveguide branch line couplers in both E-plane and H-plane configurations is presented. Ridge waveguides are chosen to benefit from their wide mono-mode band and compact size compared to rectangular waveguides. Equivalent circuit parameters are used to synthesize the coupler sections. Rigorous mode matching method is used for full-wave analysis and optimization of the couplers. Ridge couplers both in empty waveguide and Low Temperature Co-fired Ceramic "LTCC" technology are designed using the proposed method and the design is verified with another numerical method. A prototype is built and its response is measured to verify the approach