DEVELOPMENT AND APPLICATIONS OF SURFACE ACOUSTIC WAVE DEVICES

Zdravko Živković

Abstract:
A survey of surface acoustic wave (SAW) devices is presented and usage of different types of these devices in various civil and military telecommunications systems is discussed. The types and properties of elastic surface waves are described. Their principal features are presented in an appropriate mathematical and graphical form. The principle of surface wave devices is explained as well as the analysis of interdigital transducers based on equivalent circuits or the delta function model. The information also presents the most important linear and nonlinear SAW devices and SAW processors used for complex signal processing, such as frequency filtering, convolution and correlation of signals, cepstral analysis or Fourier transforms. Finally, military applications of these elements in modern pulse compression radars, compressive receivers and spread spectrum communication systems are discussed.

Key words: acoustic ware, surface acoustic ware, acoustic ware propagation, elastic ware, ware equation, SAW device, SAW filter, SAW resonator, SAW oscillator, compressive receiver, telecommunications, military telecommunications, radar.