Dual-wideband filter with wide high-rejection band using composite resonators
Publication in refereed journal

香港中文大學研究人員
替代計量分析
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其它資訊
摘要A new type of dual-wideband bandpass filter using composite series and shunt resonators is proposed in conjunction with its direct synthesis and design theory. By making use of the transmission pole (TP) and the transmission zero of the composite resonators flexibly, a dual-wideband filter with a wide range of frequency and bandwidth ratios as well as a wide stopband can be realised. With a shunt capacitor introduced at each I/O port, extra TPs either in the low passband or in the high passband can be created, leading to more filter design options. To give a direct design procedure, a lumped-element prototype is first synthesised based on a target filtering function and a dedicated circuit extraction process. The filter layout can be realised using semi-distributed circuits and chip capacitors. Two practical schemes are introduced to suppress spurious resonances for a wide high-rejection stopband. Two filter examples are designed with a small and a large frequency ratio and a wide band suppressed spurious resonances. The unique filter response and good agreement between the designed and measured results demonstrate the superior performance of the proposed filter structure and the effectiveness of the synthesis and design theory.
出版社接受日期25.02.2019
著者Zhiliang Li, Ke-Li Wu
期刊名稱IET Microwaves, Antennas and Propagation
出版年份2019
月份2
日期27
卷號13
期次3
出版社Institution of Engineering and Technology (IET)
出版地UK
頁次291 - 299
國際標準期刊號1751-8725
電子國際標準期刊號1751-8733
語言美式英語
關鍵詞band-pass filters,capacitors,poles and zeros,resonator filters

上次更新時間 2020-25-11 於 23:56