Premium
Dual‐mode bandpass filter using internally coupled stub‐loaded resonators
Author(s) -
Hua Changzhou,
Miao Chen,
Li Bo,
Wang Hui,
Wu Wen
Publication year - 2011
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.25769
Subject(s) - resonator , band pass filter , stub (electronics) , stopband , microstrip , microwave , electronic engineering , physics , acoustics , materials science , optoelectronics , engineering , telecommunications
A dual‐mode bandpass filter using stub‐loaded resonators with internal coupled lines for high‐selectivity application has been presented. Based on the odd‐ and even‐mode equivalent circuits, the resonant characteristics of the proposed microstrip resonator are investigated. The proposed resonator is found to have the merit that the even‐mode resonant frequencies can be flexibly controlled, whereas the odd‐mode resonant frequencies are unaffected. It is also found that there is a finite‐frequency transmission zero inherently through the stopband. Based on the proposed resonator, a compact and high‐selectivity bandpass filter is demonstrated. Experimental results are presented, which confirm our idea. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:643–646, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25769