@conference {11_IMS_Ruiz-CruzFahmiMansour_Compactfour-portRectWgSwitches,
	title = {Compact four-port rectangular waveguide switches based on simple short circuit loads},
	booktitle = {2011 IEEE MTT-S International Microwave Symposium Digest},
	year = {2011},
	month = {June},
	pages = {1-4},
	abstract = {Four-port rectangular waveguide switches presented in this paper are based on alternating simple short and open circuit loads in the waveguide path. The proposed concept eliminates the use of bulky rotary mechanisms to provide path switching. The device layout is very simple and compact and is presented for C-, R- and T-type switches. The experimental performance of a T-type switch shows a return loss better than 23 dB from 13 to 14.5 GHz, insertion loss of 0.3 $\#$x2013;0.4 dB and isolation of 28 dB.},
	issn = {0149-645X},
	doi = {10.1109/MWSYM.2011.5973154},
	url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5973154},
	author = {J A Ruiz-Cruz and Fahmi, M M and Mansour, R R}
}
@conference {10_IMS_FahmiRuiz-CruzMansourEtAl_CompactDualBandRidge,
	title = {Compact Wide-Band Ridge Waveguide Dual-Band Filters},
	booktitle = {2010 IEEE MTT-S International Microwave Symposium Digest},
	year = {2010},
	month = {May},
	pages = {888-891},
	abstract = {A compact wide-band, dual-band filter realized in air filled metallic ridge waveguides is proposed. Dual-band filters replace doubly multiplexed filters, thus simplifying the system architecture considerably. The filter is realized in a canonical folded structure layout. Coupling sections that realize strong coupling values required for the wide-band characteristics are achieved by means of transversal sections of ridges connecting the main ridge waveguide resonators. The filter is efficiently modeled using rigorous mode matching method. The filter response is further verified using a commercially available Finite Element Method software. In addition a prototype was built and tested for verification.},
	issn = {0149-645X},
	doi = {10.1109/MWSYM.2010.5517525},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=05517629},
	author = {Fahmi, M M and J A Ruiz-Cruz and Mansour, R R and Zaki, K A}
}
@conference {09_IMS_FahmiRuiz-CruzZakiEtAl_CompactRidgeNRN,
	title = {Compact Ridge Waveguide Filters using Non-resonating Nodes},
	booktitle = {2009 IEEE MTT-S International Microwave Symposium Digest},
	year = {2009},
	month = {June},
	pages = {1337-1340},
	abstract = {A ridge waveguide filter based on the nonresonating node (NRN) concept is proposed. A new coupling mechanism, suitable for this realization is introduced. The proposed coupling mechanism alleviates the need to use other complicated structures and simplify the design process significantly. Rigorous mode matching method (MMM) is used to model the filter. The filter response is further verified using another numerical technique. A prototype was built and tested. Measurement results agree well with simulation.},
	issn = {0149-645X},
	doi = {0.1109/MWSYM.2009.5165952},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5165952\&isnumber=5165586},
	author = {Fahmi, M M and J A Ruiz-Cruz and Zaki, K A and Mansour, R R}
}
@article {09_IEEETMTT_FahmiRuiz-CruzMansourEtAl_CompactRidgeWaveguideTZNRN,
	title = {Compact Ridge Waveguide Filters With Arbitrarily Placed Transmission Zeros Using Nonresonating Nodes},
	journal = {IEEE Transactions on Microwave Theory and Techniques},
	volume = {57},
	number = {12},
	year = {2009},
	month = {Dec.},
	pages = {3354-3361},
	abstract = {Compact size ridge waveguide filters based on the nonresonating node concept are introduced to realize transfer functions with arbitrarily placed attenuation poles. Coupling mechanisms, suitable for the new realization are introduced in diverse $E$ -plane and $H$ -plane configurations and with different input-output interfaces. These coupling structures are studied and characterized in detail in order to simplify the design of the proposed filters. Rigorous mode-matching method is used to accelerate the full-wave design of the filter configurations, whose response is also verified using other numerical techniques and experimental data. To validate the proposed novel designs, a prototype has been built and tested. Measurement results agree well with the predicted theoretical simulations.},
	keywords = {Attenuation poles, microwave filters, mode-matching, ridge waveguides},
	issn = {0018-9480},
	doi = {10.1109/TMTT.2009.2034423},
	url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=5308444\&isnumber=5340253},
	author = {Fahmi, M M and J A Ruiz-Cruz and Mansour, R R and Zaki, K A}
}
