中文摘要：

这份报纸在表面上论述一个最佳的图案声学的波浪用模式 COM 联合的反射延期线当模特儿。SAW 设备的思考系数 S11 被推出评估设备表演。典型的锯反射延期线由沿着声学的繁殖方向放的压电的底层， interdigital 变换器 IDT 和几个反射镜组成。设备的设计参数的影响反射镜例如 IDT 的结构，打字，设备性能上的等等被调查，并且最佳的设计参数是坚定的。基于这些参数， 434 MHz 看见了反射延期与单个阶段排队单向性的变换器和三个 shorted 栅栏反射镜在 41 上被制作

英文摘要：

This paper presents an optimal design on surface acoustic wave reflective delay line using coupling of modes （COM） model. The reflection coefficient S11 of the SAW device is deduced to evaluate the device performance. Typical SAW reflective delay line consists of a piezoelectric substrate, an interdigital transducer （IDT） and several reflectors positioned along the acoustic propagation direction. The influences of the design parameters of the device, such as structure of the IDT, reflector types, etc. on device performance are investigated, and the optimal design parameters are determined. Based on these parameters, a 434 MHz SAW reflective delay line with single phase unidirectional transducers and three shorted grating reflectors is fabricated on 41° YX LiNbO3. The measured Sn agrees well with the simulated one. Sharp reflection peaks, high signal noise ratio （S/N）, and low spurious noise between the reflection peaks are observed.