叉指换能器模型对声表面波滤波器的影响及其设计考虑

The Effect of IDT Models on SAWF Synthesis and the Consideration for Design

本文论述了叉指换能器(IDT)模型对声表面波滤波器(SAWF)综合设计的影响;指出了现有综合设计方法共同存在的问题;并提出了一种新的设计思想和方法。该方法能将IDT的物理模型直接纳入SAWF综合设计之中,并能消除现有方法不可避免存在的器件实际响应与设计目标响应之间的偏离,提高SAWF的设计精度。

This paper has studied the effect of IDT models on synthesis design of SAWF, pointed out the problems of existing design method, and put both the new idea and method by wh'ich the IDT model can be adopted directly into design, of SAWF, the deviation between the goal response required and the practical device response which could not avoided in old design methods can be removed, and thus the design accuracy of SAWF can be enhanced.