评述了投入实际服务的公共电信系统所用的SAW器件,并介绍了SAW器件的应用前景。 F-400M光纤传输系统的400MHz定时振荡回路和汽车电话系统的145MHz SAW谐振器稳定压控振荡器是现在实际应用中仅有的两种器件。但是,由于它们工作于高频基波模式,具有良好的重复性和老化性能,所以器件的应用在不断地增加。 The SAW devices used in public telecommunication systems put into practical service are reviewed, and the application prospect of SAW devices is introduced. The 400MHz Timing Loop of the F-400M Fiber Optic Transmission System and the 145MHz SAW Resonator for Automotive Phone Systems Stable voltage-controlled oscillators are the only two devices currently in practical use. However, due to their high frequency fundamental mode of operation, with good repeatability and aging properties, the device applications are constantly increasing.