@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}
}
@conference {04_IMS_LiuRuiz-CruzWangEtAl_extremelywidebandridge,
	title = {An extremely wideband ridge waveguide filter},
	booktitle = {2004 IEEE MTT-S International Microwave Symposium Digest},
	volume = {2},
	year = {2004},
	month = {June},
	pages = {615-618},
	abstract = {An extremely wideband ridge waveguide filter is presented. The fractional bandwidth of the filter can be greater than 115\%. An input and output transition from ridge waveguide to stripline and then to coax is also designed. The analysis is done with mode matching method and verified with Ansoft HFSS. For validation purpose, a test filter with pass band from 3 GHz to 9 GHz has been designed. The results by both mode matching method and Ansoft HFSS are presented. Excellent agreement is obtained. The test filter is designed using air filled ridge waveguide; however the same design procedure can be equally applied to other manufacturing techniques such as LTCC.},
	keywords = {air filled ridge waveguide, fractional bandwidth, mode matching, mode matching method, ridge waveguides, strip lines, stripline, waveguide filters 3 to 9 GHz, wideband ridge waveguide filter},
	issn = {0149-645X},
	doi = {10.1109/MWSYM.2004.1336059},
	url = {http://ieeexplore.ieee.org/iel5/9277/29472/01336059.pdf?tp=\&isnumber=\&arnumber=1336059},
	author = {Liu, Z M and J A Ruiz-Cruz and Wang,C and Zaki, K A}
}
