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Compact dual‐band bandpass filter using octagonal split‐ring resonators with side‐coupled stubs
Author(s) -
Liu H. W.,
Shen L.,
Guan X.H.,
Huang D. C.,
Lim J. S.,
Ahn D.
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.25938
Subject(s) - passband , band pass filter , resonator , split ring resonator , multi band device , microwave , filter (signal processing) , bandwidth (computing) , band stop filter , electronic engineering , physics , optics , topology (electrical circuits) , materials science , acoustics , engineering , electrical engineering , low pass filter , telecommunications , antenna (radio)
A compact dual‐band bandpass filter using side‐coupled octagonal split‐ring resonators (SRR) is introduced in this letter. The proposed filter employs two sets of SRRs operating at different frequencies to generate two passbands. Besides, the side‐coupled stubs provide sufficient degrees of freedom to control the bandwidth of the two passbands. Four transmission zeros can be created close to passband edges which leads to high skirt selectivity. Measured results are in good agreement with the EM simulation results. The circuit size of the proposed filter occupies only 22.4 × 12.6 mm 2 (≈0.25 × 0.14 λ g ). © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1169–1171, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25938