Direct synthesis of a bandpass filter with a controllable transmission zero

Yu Chen Chen, Lung Kai Yeh, Huey-Ru Chuang

研究成果: Conference contribution

摘要

A novel bandpass filter with a controllable transmission zero located at the upper stopband is proposed. The circuit model and design equations are established. The location of the transmission zero can be adjusted by varying the shunt short-circuited stub of the resonators. Based on the coupled mechanism, the other transmission zero is created at the lower stopband by properly controlling the coupling strength of the coupled line. In this way, the proposed bandpass filter provides a better cutoff rate in the stopband and gives much improved selectivity. The illustrated filter with a center frequency of 2.4 GHz has an insertion loss of less than 2 dB and a return loss of more than 15 dB. The transmission zeros are located at 2.1 GHz and 3 GHz. A good agreement between the simulated and measured results is obtained.

原文English
主出版物標題2010 Asia-Pacific Microwave Conference Proceedings, APMC 2010
頁面1962-1965
頁數4
出版狀態Published - 2010 十二月 1
事件2010 Asia-Pacific Microwave Conference, APMC 2010 - Yokohama, Japan
持續時間: 2010 十二月 72010 十二月 10

出版系列

名字Asia-Pacific Microwave Conference Proceedings, APMC

Other

Other2010 Asia-Pacific Microwave Conference, APMC 2010
國家Japan
城市Yokohama
期間10-12-0710-12-10

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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  • 引用此

    Chen, Y. C., Yeh, L. K., & Chuang, H-R. (2010). Direct synthesis of a bandpass filter with a controllable transmission zero. 於 2010 Asia-Pacific Microwave Conference Proceedings, APMC 2010 (頁 1962-1965). [5728354] (Asia-Pacific Microwave Conference Proceedings, APMC).