Premium
Microstrip parallel coupled‐line bandpass filter with selectivity improvement using U‐shaped defected ground structure
Author(s) -
Piscarreta Daniel,
Ting SioWeng
Publication year - 2008
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.23236
Subject(s) - passband , microstrip , band pass filter , microwave , electronic engineering , filter (signal processing) , frequency selectivity , transmission line , engineering , topology (electrical circuits) , selectivity , electrical engineering , telecommunications , chemistry , biochemistry , catalysis
A novel defected ground structure (DGS) feedline element with two transmission zeros and flat passband is proposed. The zeros can be tuned individually by the DGS geometry to improve the low order filter's selectivity. A traditional microstrip parallel coupled‐line bandpass filter cascading this new element, not only achieves the selectivity improvement, but also its basic design formulation is retained. A prototype DGS filter was designed and tested to validate its performance. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 911–915, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23236