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Microstrip parallel coupled-line bandpass filter with selectivity improvement using U-shaped defected ground structure

✍ Scribed by Daniel Piscarreta; Sio-Weng Ting

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 375 KB
Volume: 50
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.23236

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✦ Synopsis

Abstract

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

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