表面声波(SAW)已经从一些理论概念逐步发展成熟,形成一门可以根据器件的应用场合、设计性能范围以及未来的发展潜力进行分类的定义明确的技术。 SAW是用加权的变迹或非变迹的金属叉指换能器(IDT)在适当的压电基片上激发的,以声速沿基片表面传播确定的路径长度,然后用另一组换能器在接收端检测的。在这里换能器的作用是把电的射频(RF)信号转换成声信号(晶体的振动),或把声信 Surface acoustic wave (SAW) has evolved from a number of theoretical concepts to a well-defined technique that can be categorized according to the device’s application, design performance range, and future growth potential. SAW is excited with a weighted apodized or non-apodized metal interdigital transducer (IDT) on a suitable piezoelectric substrate to propagate a defined path length along the substrate surface at the speed of sound and then transduced with another set of transducers Detected at the receiving end. Transducer here is the role of the radio frequency (RF) signals into acoustic signals (crystal vibration), or the voice of the letter