基于SAW技术的新型裁判无源通信系统

Novel passive communication system for referee based on surface acoustic wave technology

利用声表面波(SAW)技术设计实现了一种用于裁判之间的无线无源联络系统。其基本原理是主裁判携带的收发器发射射频查询脉冲信号,边裁携带的用SAW器件实现的无源信号发生器接收到查询信号后,利用阻抗变化所引起的不同反射性,把由边裁控制的按钮开关的状态调制到对查询信号的反射回波上,收发器通过对接收信号的处理获得边裁的信息。这种方法与通常的无线收发机相比,信号发生器工作在无源状态,无需电池供电,同时利用声波的延迟特性,提高了抗干扰性。实验结果表明:本方法能够有效实现无源信息传输。

A passive wireless communication system for referee based on surface acoustic wave （SAW） is presented. The principle is transceiver taken by referee emits RF pulse. Wireless reflector handed by lineman receives the RF pulse and reflects RF pulses that modulated by switch. It＇ s because different impedance results in different reflectivity. The merits of this system is real passive and wireless, can be used in harsh environment. The experiment validated the system can comnmnicate accurately.