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改进型梯形谐振滤波器的带通滤波器设计 被引量：5

SAW Bandpass Filter Design of Improved Ladder-type Resonator
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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30dB以上。 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 response figure, this filter has a more steady passband and more precipitous transition zone, and the stop-band rejection is more than 30 dB.
作者 盛正茂 覃亚丽 谢长明
机构地区 浙江工业大学信息工程学院
出处 《电声技术》 2011年第7期31-32,37,共3页 Audio Engineering
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 SAWF SAW resonator LC equivalent circuit suppression near to passband
分类号 TN713.5 [电子电信—电路与系统]
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共引文献5

同被引文献41

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电声技术
2011年 第7期

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