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Design of parallel coupled‐line microstrip wideband bandpass filter using stepped‐impedance resonators
Author(s) -
Hung ChengYuan,
Weng MinHang,
Su YanKuin,
Yang RuYuan
Publication year - 2007
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.22260
Subject(s) - microstrip , band pass filter , passband , resonator , center frequency , bandwidth (computing) , wideband , microwave , insertion loss , electronic engineering , materials science , electrical engineering , optoelectronics , engineering , acoustics , telecommunications , physics
In this article, a parallel coupled‐line microstrip wideband bandpass filter (PCM‐WBF) using stepped‐impedance resonators (SIRs) is designed and implemented on commercial printed circuit board (PCB) of RT/Duroid 5880 substrate. The first two resonant modes of the SIR are coupled together and they are applied to create a wide passband. The proposed filter at center frequency f 0 of 5.76 GHz has very good measured characteristics including a bandwidth of 3.63–7.92 GHz (3‐dB fractional bandwidth of 74%) and a low insertion loss of −1 ± 0.9 dB. Experimental results of the fabricated filter show a good agreement with the predict results. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 795–798, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22260