National Changhua University of Education Institutional Repository : Item 987654321/10329
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题名: A tunable uniplannar band-pass filter circuit using a CPW-fed ACPS semi-ring structure
作者: Chuang, C.-C.;Ho, Min-Hua
贡献者: 電子工程學系
关键词: Uniplanar;Ring;BPF;CPW;ACPS
日期: 2003-10
上传时间: 2012-05-22T06:28:44Z
出版者: 國立台北科技大學
摘要: Most tunable band-pass filters (BPF) are operated with supplemental electronic circuits. These supplemental circuits need extra bias voltage or current source and the corresponding regulation circuits, which result in the increases of circuit complexity and cost. We propose a tunable uniplannar band-pass filter by using a CPW-fed asymmetric coplanar stripline (ACPS) semi-ring structure. The circuit of a passive configuration obtains the tuning function by adding to itself variable length of metal shorts. By placing arc-shaped metal patches on the top and bottom positions of an ACPS ring structure, it thus physically shorts the electric field in those locations may compose the ACPS semi-ring. A coplanar waveguide (CPW) is used to couple the feeding signal to and from the ACPS semi-ring via a narrow gap. By varying the arc length of the shorting metal patches, we can tune the pass-band's center frequency to a desired frequency from 3.80 GHz to 5.56 GHz. The achieved tuning ratio is as wide as 37.6 % for this proposed structure with the circuit insertion losses kept within 10 dB.
關聯: Conference Digest Taiwan EMC Conference 2003, 國立台北科技大學, Oct. 17-18, 2003: 480-483
显示于类别:[電子工程學系] 會議論文

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