Pspice Equivalent Circuit Model for Implementation of Surface Acoustic Wave Filter  

作　　者：李媛媛 卢文科 朱长纯 刘君华 蒋华 

机构地区：[1]College of Information Science and Technology,Donghua University [2]College of Electronic and Electrical Engineering,Shanghai University of Engineering Science [3]College of Electronics and Information Engineering,Xi'an Jiaotong University [4]College of Electronics and Information,Nantong University

出　　处：《Journal of Donghua University(English Edition)》2012年第2期148-152,共5页东华大学学报（英文版）

基　　金：National Natural Science Foundation of China (No.60976058)

摘　　要：The crystals of quartz,lithium,and piezoelectric ceramics have a piezoelectric effect as their major characteristic.The surface acoustic wave filter(SAWF) was designed by using this property.However,the experimental cost of the fabrication of SAWF is higher than that of mechanical filter or LC filter.Through the RLC(resistor,inductor and capacitor) network equivalent circuit and the interdigital transducer(IDT) equivalent circuit model,the electromotive force,the mechanical impedance of piezoelectric plate,and the wave number of Mason circuit model were researched.The equivalent circuit can be used to reduce product development costs and shorten the development cycle.Comparing simulation result by Pspice software with the theory of SAWF,the simulated waveform is similar to theory measurement,and the equivalent circuit model is verified.The crystals of quartz, lithium, and piezoelectric ceramics have a piezoelectric effect as their major characteristic. The surface acoustic wave fdter （SAWF） was designed by using this property. However, the experimental cost of the fabrication of SAWF is higher than that of mechanical filter or LC filter. Through the RLC （ resistor, inductor and capacitor ） network equivalent circuit and the interdigital transducer （ IDT ） equivalent circuit model, the electromotive force, the mechanical impedance of piezoelectric plate, and the wave number of Mason circuit model were researched. The equivalent circuit can be used to reduce product development costs and shorten the development cycle. Comparing simulation result by Pspice soRware with the theory of SAWF, the simulated waveform is similar to theory measurement, and the equivalent circuit model is verified.

关 键 词：surface acoustic wave filter(SAWF) interdigital transducer(IDT) Mason equivalent circuit Pspice software 

分 类 号：TP216.1[自动化与计算机技术—检测技术与自动化装置]