Premium
Design of the wideband dual‐mode bandpass filter using stepped impedance resonators
Author(s) -
Hung ChengYuan,
Weng MinHang,
Jhong ShihBin,
Wu Sean,
Lee MawShung
Publication year - 2008
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.23281
Subject(s) - passband , resonator , wideband , band pass filter , bandwidth (computing) , electronic engineering , insertion loss , microstrip , acoustics , electrical impedance , microwave , dual mode , engineering , physics , electrical engineering , telecommunications
In this letter, a novel dual‐mode bandpass filter (BPF) using stepped impedance resonators (SIRs) for simultaneous low insertion‐loss and wide passband has been designed. This novel wideband dual‐mode BPF is formed by a microstrip square ring resonator with direct‐connected orthogonal feed lines, and two impedance steps as perturbations. By varying the impedance ratio ( K ) of the SIRs, the wideband bandwidth can be tuned with more freedoms. The design procedure using the analysis of even and odd mode is described in this paper. The wideband BPF with relative bandwidth of 76.5% is simulated using the full wave electromagnetic simulation, and then fabricated and measured using the network analyzer. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1104–1107, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23281