Yaghmaee, P.Karami Horestani, A.Bates, B.Fumeaux, C.2013-05-242013-05-242012Proceedings of the 2012 Asia-Pacific Microwave Conference, held in Kaohsiung, Taiwan, 4-7 December, 2012: pp.776-7789781457713309http://hdl.handle.net/2440/77960The characterization of a tunable band-pass filter based on stepped-impedance resonator (SIR) is presented in this work. The designed filter uses a half-wavelength resonator patch above a multi-layer substrate, with liquid crystal as its central layer, making it continuously tunable at frequencies around S-band. Two liquid crystal samples are considered for three different approaches: lumped-element circuit simulation, full-wave electromagnetic simulations and prototype measurements. The results demonstrate the possibility of using a simple lumped-element circuit simulation for rapid calculation of the performances of liquid crystal devices at microwave frequencies.en© Copyright 2012 IEEE - All rights reserved.Band-pass filtersstepped-impededance resonator (SIR)liquid crystaltunable filterConference paper002012675310.1109/APMC.2012.64217320003192137002552-s2.0-8487442409920482Fumeaux, C. [0000-0001-6831-7213]