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Compact lowpass filter with a sharp roll‐off using patch resonators
Author(s) -
Raphika P. M.,
Abdulla P.,
Jasmine P. M.
Publication year - 2014
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.28644
Subject(s) - stopband , low pass filter , microstrip , resonator , filter (signal processing) , cutoff frequency , microwave , elliptic filter , acoustics , materials science , prototype filter , electronic engineering , engineering , optics , physics , optoelectronics , electrical engineering , telecommunications
This article presents a new compact microstrip lowpass filter with sharp roll‐off and ultrawide stopband using funnel and triangular patch resonators. The patch resonators are placed symmetrically about a high impedance central microstrip line. The filter has been designed and fabricated using a very low cost material. The experimental results show a good agreement with the simulated results and demonstrate that, the sharp roll‐off and good stopband performance is obtained by the proposed filter. The 3 dB cutoff frequency of the proposed filter is at 5.55 GHz with a roll‐off of 84 dB/GHz and its stopband extends up to 11.8 GHz. The filter has an ultra compact size of 9.4 × 8 mm 2 . © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2534–2536, 2014