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An ultra‐wideband bandpass filter using hybrid structure of microstrip and CPW
Author(s) -
Luo Xun,
Ma JianGuo,
Ma Kaixue,
Yeo Kiat Seng
Publication year - 2009
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.24658
Subject(s) - microstrip , coplanar waveguide , resonator , passband , band pass filter , microwave , stub (electronics) , bandwidth (computing) , optoelectronics , ultra wideband , electronic engineering , wideband , return loss , materials science , engineering , electrical engineering , telecommunications , antenna (radio)
An ultra‐wideband (UWB) bandpass filter is proposed based on the hybrid structure of microstrip and coplanar waveguide (CPW). First, the detached‐mode resonator is formed on the CPW layer, which composes a quarter‐wavelength (λ/4) multiple‐mode resonator (MMR) with a short‐stub and a λ/4 single‐mode resonator. Then, two λ/4 microstrip open‐stubs on the top side of the common substrate are introduced for bandwidth enhancement to meet the UWB passband limit. Quasi‐elliptic function response and UWB operation are achieved. The simulated and measured results show an excellent agreement. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2470–2473, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24658