標題: 並聯開路殘段加載之微帶線共振腔特性及帶通濾波器之應用
Resonant Characteristics of Stub-Loaded Microstrip Resonator and Its Application to Bandpass Filter Design
作者: 陳志誠
Chih-Chen Chen
郭仁財
Jen-Tsai Kuo
電信工程研究所
關鍵字: 濾波器;開路殘段;高階諧波;多模共振腔;filter;open stub;multispurious suppression;multimode resonator
公開日期: 2006
摘要: 本論文研究以開路殘段加載的微帶線共振腔,內容有兩部分。第一部分研究平行耦合帶通濾波器,每個共振腔施以不同的加載,以得到不同的高階諧振頻率,達到很寬的上截止帶的設計目的。 第二部分研究以殘段加載達到多模共振腔的設計。文中設計及分析三模與五模的共振腔,並將之應用在準橢圓函數濾波器的設計。所製作的電路,模擬結果和實際量測結果相當吻合。
Parallel-coupled line bandpass filters and quasi-elliptic function bandpass filters are synthesized based on stub-loaded resonators. The open stub behaves as a capacitor which can be trimmed to produce resonators with the same fundamental frequency, but different higher order resonant frequencies. The resonators with staggered higher order frequencies are integrated in a single filter to achieve multispurious suppression in upper stupband. The tapped open stubs can also introduce an attenuation pole and a transmission zero to design a tripple-mode resonator and quintuple-mode resonator. The I/O stage is realized by means of a parallel-coupled stage. Bandpass filter is synthesized with a transmission zero on both lower and upper sides of passband. Measured results show good agreement with simulated responses.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT009413588
http://hdl.handle.net/11536/80851
Appears in Collections:Thesis