应用P矩阵法分析S型声表面波器件特性  

Characteristics Analysis of an S-type Surface Acoustic Wave Device Using P Matrix

作　　者：章安良[1] 

机构地区：[1]宁波大学信息学院,浙江宁波315211

出　　处：《电讯技术》2006年第2期29-32,共4页Telecommunication Engineering

基　　金：宁波市博士基金资助项目(2005A610011);浙江省教育厅科研项目(20040929)

摘　　要：在128°Y切割X传播方向上的LiNbO3基片上设计并研制了S型声表面波器件。它将输入叉指换能器激发的声表面波中心对称分成两路并由各自输出叉指换能器检测输出。采用P矩阵法分析推导了输入叉指换能器加电信号,一输出叉指换能器检测输出时的一次时延信号、三次渡越反射信号和五次渡越反射信号与所加电信号的关系式。采用网络分析仪测量了S型声表面波器件的幅度特性,同时,由门函数处理后获得其三次和五次渡越反射信号的幅度特性以验证理论推导的正确性。A new S- type SAW（Surface Acoustic Wave） device fabricated on 128°Y cut X LiNbO3 is reported. SAW excited by input interdigital transducers is divided centrosymmetrily into two paths detected by their output interdigital transducers. Relations of main signal, triple - transit and quintuple - transit signal detected by one interdigital transducer to input signal are deduced by P matrix. In order to verify the theoretic derivation, amplitude characteristics of the device are measured by network analyzer and disposed by gate function for triple - transit, quintuple - transit signal.

关 键 词：声表面波器件 P矩阵 门函数 设计与分析 

分 类 号：TN722[电子电信—电路与系统]