Premium
Novel slotted stepped‐impedance resonator and its application to compact and high performance bandpass filter and diplexer design
Author(s) -
Xu Jin,
Ji YuXue,
Chen ChunHong,
Wu Wen
Publication year - 2013
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20666
Subject(s) - diplexer , resonator , band pass filter , stopband , microwave , electrical impedance , materials science , optoelectronics , filter (signal processing) , acoustics , electronic engineering , electrical engineering , physics , engineering , telecommunications
By etching slots in the low‐impedance section of the conventional stepped‐impedance resonator, a novel slotted stepped‐impedance resonator (SSIR) is proposed. As two examples, a fourth‐order bandpass filter (BPF) operating at 1 GHz with a size of 0.078 λ g × 0.062 λ g and a miniaturized diplexer operating at 0.9/1.57 GHz with a size of 0.054 λ 0 × 0.086 λ 0 are designed based on the proposed SSIR. The fabricated BPF exhibits a high selectivity and a wide −30 dB rejection upper stopband from 1.13 f 0 to 6.52 f 0 , while the fabricated diplexer has up to −60 dB output isolation. © 2012 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2013.