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Miniaturized lowpass and bandstop filters using controlled coupling of open‐loop‐ring defected ground structure
Author(s) -
Boutejdar A.,
Omar A.
Publication year - 2010
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.25527
Subject(s) - passband , ground plane , microwave , microstrip , band stop filter , loop (graph theory) , electronic engineering , simple (philosophy) , coupling (piping) , split ring resonator , ring (chemistry) , stopband , filter (signal processing) , engineering , topology (electrical circuits) , band pass filter , materials science , optoelectronics , electrical engineering , metamaterial , low pass filter , telecommunications , mechanical engineering , mathematics , philosophy , chemistry , epistemology , combinatorics , organic chemistry , antenna (radio)
In this article, we present a compact microstrip bandstop filter using an open‐loop‐ring defected ground structure slot, etched in the ground plane and a simple Hi‐Lo line on the top layer. With the proposed coupling technique, a simple transformation from BSF to a corresponding LPF has been realized. The design procedure is validated using the commercial full‐wave simulator Microwave Office. The proposed BSF provides sharp transition characteristics, a wide upper stop band and improved passband response symmetry. Finally, the proposed filter structure has been fabricated and measured. The measurements are in a good agreement with the simulated results. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2575–2578, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25527