| 改进型梯形谐振滤波器的带通滤波器设计 |
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| 引用本文： | 盛正茂,覃亚丽,谢长明.改进型梯形谐振滤波器的带通滤波器设计[J].电声技术,2011,35(7):31-32,37. |
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| 作者姓名： | 盛正茂 覃亚丽 谢长明 |
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| 作者单位： | 浙江工业大学信息工程学院,浙江杭州,310023 |
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| 摘 要： | 提出了一种改进型的梯形滤波器,串联支路由单端谐振器构成,并联支路由单端对谐振器与电容元件组成.以这种改进型梯形谐振滤波器为基本单元,进行了五级级联,同时并联了一个SAW谐振器,设计出一个带通滤波器.利用等效电路模型,得到了频率响应.与传统方法相比,通带内更加平稳,同时获得了一个陡峭的过渡带,带外抑制达30 dB以上.
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| 关 键 词： | 声表面波滤波器 SAW单端对谐振器 LC等效电路 近阻带抑制 |
SAW Bandpass Filter Design of Improved Ladder-type Resonator |
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| SHENG Zhengmao,QIN Yali,XIE Changming.SAW Bandpass Filter Design of Improved Ladder-type Resonator[J].Audio Engineering,2011,35(7):31-32,37. |
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| Authors: | SHENG Zhengmao QIN Yali XIE Changming |
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| Affiliation: | SHENG Zhengmao,QIN Yali,XIE Changming (College of Information Engineering,Zhejiang University of Technology,Hangzhou 310023,China) |
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| Abstract: | An improved ladder-type-Surface Acoustic Wave Filter(SAWF) is proposed in this paper, and an one-port SAW resonator is used as the series element and a series circuit consisting of a capacitor and an one-port SAW resonator is used as a shunt element. The designed bandpass filter is constructed by five-stage cascade connection of the improved ladder-type-SAWF and parallel SAW resonators. By using the equivalent circuit, the respective frequency response is obtained. Compared with the former frequency respons... |
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| Keywords: | SAWF SAW resonator LC equivalent circuit suppression near to passband |
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