Near-zero power consumption RF MEMS sensing wake-up system

Abstract

The invention discloses a near-zero power consumption RF MEMS sensing wake-up system which comprises a trigger wake-up subsystem, a feedback cut-off subsystem and a false trigger monitoring subsystem. When no interested RF signal exists in the space, the system is in a dormant state, and the standby power consumption is zero at the moment; when some interested specific identification RF signals appear and are larger than the RF threshold power of the system, a rectifying circuit in the awakening subsystem is triggered to convert the RF signals into direct-current voltage, then a first MEMS switch is triggered and awakened through the direct-current voltage and the pre-bias direct-current voltage, so that subsequent modules are conducted, and the system is in an awakened state. The feedback cut-off subsystem enables the system to automatically cut off a power supply after completing specific work or being triggered by mistake. The false triggering monitoring subsystem can judge false triggering of non-specific RF signals and measure the strength of specific RF signals. The method has the characteristics of low false alarm rate, high sensitivity and near zero power consumption in a dormant state.

Description

technical field [0001] The invention belongs to the technical field of micro-electromechanical systems (MEMS), and in particular relates to a near-zero power consumption RF MEMS sensor wake-up system. Background technique [0002] With the continuous development of communication technology, the Internet of Things technology has received high attention all over the world. And with the rapid improvement of chip processing capabilities, IoT terminal devices have made great breakthroughs in miniaturization, enabling them to be spread all over the place. As one of the key technologies of the IoT terminal system, the unattended wireless sensor system has broad development and application prospects in the fields of infrastructure and national security. It can monitor a certain area and provide relevant information, such as radar signals , electromagnetic interference signals or the presence of intruder radio signals. Such sensing systems typically use active electronics to monito...

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