Sharp-rejection and ultra-wide bandstop filter with five transmission zero frequencies
作者： Lin Li , Qing‐Hua Wu , Kai‐Yu Zhao , Jin Li , Ya‐Ming Wang
DOI: 10.1049/IET-MAP.2012.0507
关键词: Optics 、 Passband 、 Bandwidth (signal processing) 、 Elliptic filter 、 Insertion loss 、 Attenuation 、 Stopband 、 Band-stop filter 、 Wideband 、 Materials science
摘要: This study proposes a new modified optimum wideband bandstop filter (BSF). Detailed theoretical analysis reveals that five transmission zero frequencies appear in the proposed BSF's response to compose an ultra-wide BSF with stiff rejection. Moreover, filter's bandwidth, stopband rejection level and passband performance can be tuned flexibly by changing impedances of configuration. Both simulations measurements fabricated demonstrate good including 20 dB bandwidth 140%, sharp attenuation rates more than 227.3 dB/GHz at both skirts, lower insertion loss less 1.5 upper very compact size λ g 2 .
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