Development of High-Level Design System for Raising the Performance of Surface-Acoustic-Wave Devices

开发用于提高声表面波器件性能的高级设计系统

基本信息

批准号：
01550297
负责人：
KOSHIBA Masanori
金额：
$ 1.47万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550297/
关键词：
Surface acoustic wave (SAW)SAW interdigital transducer SAW reflector SAW resonator Finite element method Numerical analysis Coupled mode theory Equivalent network theory

项目摘要

The performance of a CAD system for the design of SAW (surface acoustic wave) devices is limited by the accuracy of the simulation procedure. A precise simulation of SAW devices must take into account pure electric, acoustic, and mixed electroacoustic effects. The purpose of this project is to develop an high-level design system for various SAW devices. Results obtained are as follows:1. A numerical approach based on the finite element method has been developed for the analysis of arbitrarily shaped periodic SAW waveguides which frequently appear in the actual SAW devices, such as SAW interdigital transducer (IDT), SAW reflector, and SAW resonator.2. An equivalent network theory and a coupled mode theory are developed for the analysis of excitation characteristics of SAW-IDT and of reflection characteristics of SAW qratings. Circuit parameters of equivalent networks and coupling and transduction coefficients of coupled mode equations can be theoretically determined by applying the finite element method to an infinite array corresponding to an electrically shorted or open IDT. The finite element method is also used to calculate the static capacitance for one pair of IDTs.3. A unified numerical approach based on the finite element method is developed for the magnetostatic wave propagation in a YIG film.

用于设计（表面声波）设备设计的CAD系统的性能受模拟过程的准确性限制。对锯设备进行的精确模拟必须考虑到纯电气，声学和混合电声效应。该项目的目的是为各种锯设备开发高级设计系统。获得的结果如下：1。已经开发了一种基于有限元方法的数值方法，用于分析任意形状的周期性锯式波导，该分析经常出现在实际的SAW设备中，例如SAW saw Interdigital plastducer（IDT），SAW Refflector和SAW RESONATOR.2。开发了等效的网络理论和耦合模式理论，用于分析锯式的激发特征和锯QRatings的反射特征。理论上，可以通过将有限元方法应用于与电气短路或打开的IDT相对应的无限阵列来确定等效网络的电路参数以及耦合模式方程的耦合和转导系数。有限元方法还用于计算一对IDT的静态电容3。基于有限元方法的统一数值方法是为Yig膜中的磁波传播而开发的。