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Compact Dual-Wideband Bandpass Filter with Multimode Resonator
Haiwen Liu,Shen Li,Xuehui Guan,Baoping Ren,Jiuhuai Lei,yanwang 한국전자통신연구원 2014 ETRI Journal Vol.36 No.1
A microstrip dual-wideband bandpass filter using amultimode resonator (MMR) is proposed in this letter. Theproposed MMR loaded with a T-shaped open-ended stub and ashort-ended stub exhibits triple mode characteristics, and asynthesis method is developed to illustrate the wide passbandwith independently controllable center frequencies andbandwidths. To verify this design methodology, a dualwidebandfilter with fractional bandwidths of 19.1% and27.9% is designed and fabricated. The measured results agreewith the simulations.