Ultra -low power consumption wireless and passive temperature sensor

The utility model provides an ultra -low power consumption wireless and passive temperature sensor, does does include the communication antenna, get ability antenna, power management module, temperature frequency conversion module, frequency digit conversion module and backscattering modulator. The utility model discloses a get can the antenna the mode provide the electric energy for whole circuit, need not built -in power supply, solved the difficulty of unable change battery of later stage, greatly reduced manufacturing cost and later maintenance expense, the backscattering modulator has the zero -power modulation based on radar backscattering principle, characteristics that circuit structure is simple. 种超低功耗无线无源温度传感器，包括通信天线、取能天线、电源管理模块、温度-频率转换模块、频率-数字转换模块以及反向散射调制器。本实用新型采用取能天线的方式为整体电路提供电能，无需内置电源，解决了后期无法更换电池的困难，大大降低了制造成本和后期维护费用；反向散射调制器基于雷达反向散射原理，具有零功耗调制，电路结构简单的特点。