| 声表面波窄带梯形滤波器的仿真与设计 |
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| 引用本文： | 黄华,石玉,钟慧,杜波.声表面波窄带梯形滤波器的仿真与设计[J].压电与声光,2011,33(3). |
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| 作者姓名： | 黄华 石玉 钟慧 杜波 |
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| 作者单位： | 电子科技大学微电子与固体电子学院,四川成都,610054 |
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| 摘 要： | 使用机电耦合系数小的基片可减小声表面波梯形滤波器的带宽,但会降低基片的声电转换效率,增加滤波器的插入损耗.该文设计了基于m推演结构的梯形滤波器,使滤波器过渡带宽上产生2个额外的传输零点;降低通带宽度,并在此基础上分析了各参数对其性能的影响,通过调整参数以满足不同需求.实验结果表明,中心频率为500 MHz的梯形滤波器,带宽由40 MHz减小到15 MHz,矩形系数由1.6减小到1.3,滤波器的插入损耗增加了0.5 dB.
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| 关 键 词： | 梯形滤波器 m推演 传输零点 窄带 |
Simulation and Design of Narrow-band SAW Ladder-type Filter |
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| HUANG Hua,SHI Yu,ZHONG Hui,DU Bo.Simulation and Design of Narrow-band SAW Ladder-type Filter[J].Piezoelectrics & Acoustooptics,2011,33(3). |
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| Authors: | HUANG Hua SHI Yu ZHONG Hui DU Bo |
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| Affiliation: | HUANG Hua,SHI Yu,ZHONG Hui,DU Bo (School of Microelectronics and Solid-State Electronics,University of Electronic Science and Technologyof China,Chengdu 610054 Sichuan) |
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| Abstract: | For ladder-type SAW filter,small k2 of piezoelectric substrate could reduce the width of pass-band,which resulted in decreasing the transform efficiency and increasing the insert loss.This paper investigated the structure of m-derived ladder-type filter,which generated two extra transmission zeros to reduce the pass-band.Then electrical parameters were regulated to suit different customer needs by adjusting parameters.As a result,the frequency of the ladder-type filter was 500 MHz,the pass-band decreased fr... |
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| Keywords: | ladder-type filter m-derived transmission zero narrow band |
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