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介绍了基于耦合模(COM)模型的声表面波(SAW)器件的仿真方法,并将这种仿真方法分别运用于模拟简单和复杂SAW器件.在此基础上,进行了SAW滤波器的设计研究:首先设计了一个中心频率与梯形滤波器相同或相近的纵向耦合双模谐振器型滤波器(DMS),然后将梯形滤波器与DMS滤波器进行多种方式的级联,并对级联后的器件进行模拟分析,最后通过比较得到性能较好的高带外抑制RF滤波器.
The simulation method of surface acoustic wave (SAW) device based on coupled mode (COM) model is introduced, and the simulation method is applied to simulate simple and complex SAW device respectively. On this basis, the design of SAW filter Firstly, a longitudinally coupled bimodal resonator filter (DMS) whose center frequency is the same as or close to that of a ladder filter is designed. Then, the ladder filter and the DMS filter are cascaded in multiple ways, and after cascading Of the device for simulation analysis, and finally get better performance by comparing the high band rejection RF filter.