Narrowband coupled-line bandstop filter with absorptive stopband

Jhih Ying Shao, Yo Shen Lin

研究成果: 雜誌貢獻期刊論文同行評審

38 引文 斯高帕斯(Scopus)

摘要

This paper presents a new type of absorptive bandstop filter (ABSF) design that is targeted for absorbing the local-oscillator-to-RF leakage of mixer in a heterodyne receiver. The proposed ABSF is designed to absorb the input power at its Port 1, and it is achieved by introducing one lossy resonator to a conventional narrowband coupled-line bandstop filter. Suitable equivalent circuit models and closed-form design equations are established to enable the direct synthesis of proposed ABSFs. Specifically, a proposed microstrip ABSF with a stopband center frequency f0 of 2 GHz is demonstrated. The maximal stopband rejection is 34.8 dB with an input return loss of 27.7 dB, which implies that 99.8% of the input power is dissipated by the proposed ABSF.

原文???core.languages.en_GB???
文章編號7192740
頁(從 - 到)3469-3478
頁數10
期刊IEEE Transactions on Microwave Theory and Techniques
63
發行號10
DOIs
出版狀態已出版 - 10月 2015

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