Compact microstrip lowpass filter with wide stopband using ring resonator

A microstrip lowpass filter (LPF) with ultra-wide band and compact size is reported. The proposed simple filter structure consists of a split ring resonator. The presented filter with -3 dB cut off frequency at 2.11 GHz and wide stopband from 2.51 to 20 GHz with the -20 dB attenuation level has been designed. This filter also has good return loss equal to 19.45 and low insertion loss lower than 0.15 dB in approximately 86% of the passband

کلیدواژه ها:

microstrip lowpass filter (LPF) ،