利用SAW技术实现极低功耗无线数字通信

压电基片上的叉指换能器在外接不同阻抗负载时对声表面波会有不同的反射强度。利用此特性，通过控制外电路负载的变化就可实现数字信号 的无线传输，发射端无需用于发射信号的能量，所以系统只需要用于控制的能量，耗能可以极小，文中分析了系统的结构与原理、特性参数的估算及其优点。

Ultra-low Power Comsumption Wireless Digital Communication Using SAW Technology

The interdigital transducer on a piezoelectric crystal chip will reflect waves with different phase and amplitude when the electronic load connected to it is changed Using this character it is possible to use peripheral circuits controlling the electronic load to implement a digital signal transmission system whose power consumption could be very low because it works in a reflection way In this paper the principal and system structure are discussed Characters estimation and the superiority to current ways of wireless transmission are also given