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Dual mode ring resonator band-pass filter with wide stopband

✍ Scribed by Mrinal Kanti Mandal; Subrata Sanyal

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
319 KB
Volume
48
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

In this article, parallel‐coupled microstrip line (PCML) with ground plane aperture is used to improve the stopband performance of a stub tuned dual mode ring resonator band‐pass filter (BPF). The PCML with ground plane structure produces a wide‐band band‐pass response, whereas the stub tuned dual mode ring resonator produces sharp cutoff. The combined filter produces vastly improved filter characteristics. A prototype fabricated BPF having passband center frequency 5.71 GHz has a bandwidth of 40.6%. The upper stopband is extended over 6 GHz and there is no undesirable passband on the lower side of the main passband. Skirt selectivity of a single stage filter is at least 120 dB/GHz. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 2216–2218, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21934

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