@article {09_IJRFMiCAE_ZhangRuiz-CruzZaki_InlineandCanonical,
	title = {Inline and Canonical Stripline Filters with Ridge Coupling Sections for LTCC Applications},
	journal = {International Journal of RF and Microwave Computer-Aided Engineering},
	volume = {19},
	number = {3},
	year = {2009},
	month = {May},
	pages = {354-363},
	abstract = {Inline and canonical filters employing stripline resonators coupled by evanescent-mode ridge waveguide sections are presented. The proposed configurations are suitable choices for broadband chip filters integrated in printed circuit boards, especially for those with constraints on size and loss. Low temperature co-fired ceramic (LTCC) technology can be used to manufacture such filters. To validate the idea, prototypes of Chebyshev and elliptic function filters are designed following a systematic procedure. Stepped impedance stripline resonators are used in the Chebyshev filter to improve the spurious response. A novel canonical structure is presented for achieving high selectivity elliptic function filter responses. Rigorous mode matching method is applied to analyze and optimize all the filters, whose results are validated by commercial software.},
	keywords = {bandpass, Chebyshev filter, elliptic response, LTCC, ridge waveguide, stripline},
	issn = {1096-4290},
	doi = {10.1002/mmce.20354},
	url = {http://www3.interscience.wiley.com/cgi-bin/fulltext/121582207/PDFSTART},
	author = {Zhang, Y and J A Ruiz-Cruz and Zaki, K A}
}
@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}
}
