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Analyses of a square ring resonator used for bandpass filter design with multispurious suppression
Author(s) -
Pan HengYau,
Yang RuYuan,
Lin JiaSheng
Publication year - 2012
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.26702
Subject(s) - resonator , band pass filter , passband , helical resonator , microstrip , coupling coefficient of resonators , square (algebra) , microwave , electronic engineering , split ring resonator , bandwidth (computing) , electrical impedance , optics , acoustics , materials science , optoelectronics , physics , electrical engineering , engineering , telecommunications , mathematics , geometry
In this article, we proposed a method to analyze the voltages, currents, and imaginary impedances of the resonant modes in the square ring resonator by converting the square ring resonator to a guided wavelength transmission line.The impedance of the first four resonant modes of the ring resonator can be found and used as the coupling region for the bandpass response design with a high quality and multispurious suppression. A filter example using this concept was designed, fabricated, and measured. The filter composed of two square ring resonators and a half wavelength microstrip line showed a wide rejection bandwidth until four times the passband frequency. The simulated and measured results of the filter example were in a good agreement. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1089–1092, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26702