@article {08_IJRFMiCAE_FahmiRuiz-CruzZaki_EandH-plane, title = {E and H-plane wide-band ridge waveguide couplers}, journal = {International Journal of RF and Microwave Computer-Aided Engineering}, volume = {18}, number = {4}, year = {2008}, month = {July}, pages = {348-358}, abstract = {A 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}, keywords = {full-wave, LTCC, mode matching, optimization, ridge waveguide}, issn = {1096-4290}, doi = {10.1002/mmce.20293}, url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/119140987/PDFSTART}, author = {Fahmi, M M and J A Ruiz-Cruz and Zaki, K A} }