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10年前日本便开始了SAW器件的大量生产.首先是TV-IF级用的横向滤波器,接着4年后就是用于录像机RF—转换器的SAW谐振器.至今日本SAW器件的年产量达100万件,总产量已达500万件.本文评述了日本日益扩大且大有潜力的SAW的应用市场.SAW器件的主要市场之一是电视相关产品,如立体声或双声道电视、CATV(共用天线)转换器、卫星TV调谐器以及高清晰度电视机.另一个市场是电讯系统,如播叫器、无塞绳电话、单元式电话及家用安全装置.由于目前日本无线电法的放宽,预计电讯市场将迅速地发展.在日本,SAW器件的开发不仅注重于设计技术,而且更注重于材料的改进.本文将讨论已开发的SAW基片及上述领域中应用的SAW器件功能和前景.
Ten years ago, Japan began mass production of SAW devices, first the transversal filter for TV-IF stages and then the SAW resonator for VCR RF-converters four years later. To date, the annual production of SAW devices in Japan has reached 1 million and total output has reached 5 million.This article reviews the growing market for SAW in Japan, with its potential to become one of the major markets for TV-related products such as stereo or 2-channel TVs, CATV ( Shared antenna) converters, satellite TV tuners, and high-definition televisions. Another market is the telecommunications system such as pager, cordless phones, cell phones and home security devices due to the relaxation of the current Japanese radio law, It is expected that the telecommunications market will rapidly develop.In Japan, the development of SAW devices not only focuses on design techniques but also focuses on material improvements.This paper will discuss the functions and prospects of SAW substrates and SAW devices used in these fields.