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Compact sharp cutoff wide stopband microstrip low‐pass filter using complementary split ring resonator
Author(s) -
Dwari Santanu,
Sanyal Subrata
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.22825
Subject(s) - stopband , cutoff frequency , passband , microstrip , microwave , cutoff , transition band , resonator , split ring resonator , low pass filter , attenuation , materials science , filter (signal processing) , physics , optics , optoelectronics , band pass filter , electrical engineering , engineering , prototype filter , telecommunications , quantum mechanics
A novel compact microstrip low‐pass filter (LPF) is proposed using open circuit stubs and square patches alongwith complementary split ring resonator (CSRR). It exhibits wide stopband and sharp rejection. A demonstration LPF, having 3‐dB cutoff frequency of 1.45 GHz, was fabricated and measured. Measured passband to stopband attenuation slope is more than 355 dB/GHz. Measured rejection greater than 20 dB extends over more than 13.75 times of the 3‐dB cutoff frequency. Electrical length of the filter is less than 12% of the guided wavelength at 3‐dB cutoff frequency. Experimental and simulated results agree well. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2865–2867, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22825