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Compact composite right‐ and left‐handed bandpass filter with interlocked gap coupling
Author(s) -
Jang Geonho,
Kahng Sungtek
Publication year - 2013
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.27326
Subject(s) - return loss , passband , band pass filter , stopband , insertion loss , microwave , coupling (piping) , materials science , electrical engineering , topology (electrical circuits) , electronic engineering , engineering , acoustics , optoelectronics , physics , telecommunications , antenna (radio) , metallurgy
We propose a novel compact bandpass filter having a mushroom with interlocked gap coupling on FR4 as a composite right‐ and left‐handed structure. The physical size reduction is made possible by the zeroth‐order resonance of the geometry. The stopband suppression >40 dB is obtained by creating transmission zeros implemented with open stubs at ports. The passband has insertion loss < 1.5 dB and return loss < −15 dB at WiMAX‐band. The simulation and measurement validate the design. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:403–405, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27326