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Sharp cut‐off, miniaturized metamaterial binomial microstrip low‐pass filter
Author(s) -
Abid Ali,
Zhirun Hu
Publication year - 2007
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.22799
Subject(s) - passband , microwave , elliptic filter , transition band , filter (signal processing) , band pass filter , high pass filter , metamaterial , split ring resonator , acoustics , materials science , electronic engineering , low pass filter , optoelectronics , engineering , telecommunications , physics , prototype filter , electrical engineering
A binomial low‐pass filter provides the flattest passband response but, slow attenuation transition. This letter presents a design for improving the roll‐off performance and reducing the size of the filter based on the negative‐ε property of complementary split ring resonators (CSRRs), whilst maintaining the filter passband performance. The measured results indicate that the proposed structure achieves a flat pass‐band with no ripples. Whilst also having a selectivity of 32 dB/GHz, which significantly exceeds the 17 dB/GHz selectivity of the conventional design. Furthermore, the proposed filter has reduced the filter size by 16%. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2406–2409, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22799