A novel microstrip lowpass filter with sharp roll-off and ultra-wide stopband using SICMRC

作者：Hayati Mohsen^*; Abbasi Hamed; Fathabadi Omid Sadeghi

来源：International Journal of Electronics, 2015, 102(9): 1475-1485.

DOI：10.1080/00207217.2014.982214

• microstrip
• bended transmission line
• lowpass filter
• ultra-wide stopband
• sharp rejection

This paper presents a novel microstrip lowpass filter with sharp roll-off and ultra-wide stopband using stepped-impedance resonator and bended transmission line structure. The filter includes stepped-impedance prototype filter and stepped-impedance compact microstrip resonator cells that are combined in one structure. The proposed filter has good specifications such as sharp roll-off, ultra-wide stopband and low insertion loss. The transition band is approximately 0.25GHz from 1.75 to 2GHz with corresponding attenuation levels of -3 and -40dB. The attenuation level in the stopband is better than -20dB that is achieved from 1.94 to 23GHz, and the insertion loss in the passband is less than 0.4dB. The proposed filter is fabricated and measured, and the simulation and measurement results are found to be in good agreement with each other.

• 出版日期2015-9-2