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最近实验已证明,采用超晶格换能器可制作GHz频段的体声波器件.这种换能器是由多层交替结晶取向排列的ZnO或极化的LiNbO_3组成.讨论了每层由各向异性和压电性以及具有任意晶体取向组成的整个多层换能器的机电特性计算过程.这种算法是在具有商业程序的专用计算机上进行,这个系统数字稳定而且容易执行.也讨论了提供近似分析多层换能器特性和观察综合过程的网络模型.比较了两种计算方法并说明了宽带换能器的最初设计程序.
Recent experiments have proved that the use of superlattice transducer GHz frequency band body acoustic wave devices can be produced.This transducer is composed of multiple layers of alternating crystal orientation of ZnO or polarized LiNbO_3 composition discussed in each layer from the direction Anisotropy and piezoelectricity as well as the electromechanical characterization of the entire multilayer transducer with arbitrary crystal orientation composition.The algorithm is performed on a dedicated computer with a commercial program which is robust and easy to implement and is also discussed as providing Approximately analyze the characteristics of multi-layer transducers and observe the network model of the integrated process. Comparing the two methods of calculation and illustrating the original design procedure of the broadband transducer.