声表面波器件二阶效应等效电路模型研究

Study on Equivalent Circuit Model of Surface Acoustic Wave Device Second-order Effects

提出了声表面波器件二阶效应的等效电路模型,应用P矩阵法严格分析推导了声表面波器件二阶效应理论表达式,并根据P矩阵分析结果得到的声表面波器件二阶效应电特性参数,采用电网络理论综合出具有相同特性的等效电路模型,且应用PSPICE进行仿真,仿真结果与实验结果基本相符,验证了所提出声表面波器件二阶效应等效电路模型的正确性。

An equivalent circuit model of SAW（Surface Acoustic Wave） second-order effects is proposed. The theoretical relation is deduced by P-matrix, from which electrical parameters are obtained. The equivalent, circuit model is synthesized with similar electrical characteristics by electric network theory. The simulating results by PSPICE illustrate the correctness of the model.