基于微波整流的半导体开关无线控制

Wireless Control of Semiconductor Switches Based on Microwave Rectification

针对有源电子标签及传感器节点低功耗唤醒模块的需求,设计了一种基于微波整流的半导体开关无线控制方法。通过微波整流之后的直流输出电压来控制半导体开关的状态,进而控制唤醒电路的直流电源通断,利用半导体开关关断状态下漏电流极低的特点,确保设备在休眠期达到极低功耗,从而延长标签及节点电源的工作时间。文中的微波整流设计主要以实现最大化直流输出电压为目标,整流天线部分采用双单元的整流阵列设计。仿真与测试结果表明,每一路天线接收到-18 d Bm的射频功率时,直流输出电压可达到典型的CMOS开关控制所需的最低电平(1 V)。

To meet the needs of the low-power wake-up paper proposes a method of wireless control of semiconductor module of active electronic tags and sensor nodes, this switches based on microwave rectification. In this de- sign, with the DC power controlled by the on/off state of a semiconductor switch, extremely low-power consumption of the wake-up module during dormancy is achieved due to the extremely low leak current of the switch. Different from traditional microwave rectifiers that are designed to provide maximum output DC power, the rectification circuit in this paper is aimed to achieve the bets output DC voltage. Simulation and measurement results show that a two-element ar- ray design achieves the minimum required controlling voltage （ 1 V） for turning on a typical CMOS switch with an RF power level as low as-18dBm received by both antenna elements.