$\mu$WSense: A Self-Sustainable Microwave-Powered Battery-Less Wireless Sensor Node for Temperature and Humidity Monitoring

IF 2.2 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Sensors Letters Pub Date : 2024-09-25 DOI:10.1109/LSENS.2024.3468808

Vikas Kumar Malav;Ashwani Sharma

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Abstract

To realize a green Internet of Things (IoT) sensor network, batteryless wireless sensor nodes (WSNs) are required. This self-sustainability is achieved via energy harvesting from conventional renewable sources, such as solar and wind, which rely on the weather and are highly expensive. Alternatively, the microwave-based wireless power transfer technique is demonstrated previously, however, only for sensing operations without including the IoT. In this letter, a

$\mu$

Wave-powered WSN (

$\mu$

Wsense) hardware is demonstrated to realize true batteryless IoT sensing applications. The

$\mu$

Wsense consists of a rectenna array (

$\mu$

wave receiver), power management unit, and BLE module. The

$\mu$

wave receiver is designed at 5.2 GHz to power

$\mu$

Wsense at a maximum measured transfer range of 2 m with a maximum real-time sensing interval of 75 s. The minimum harvested power

$-16.59$

dBm is sufficient to operate the

$\mu$

Wsense.

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$\mu$WSense：用于温湿度监测的可自我维持的微波供电无电池无线传感器节点

为实现绿色物联网（IoT）传感器网络，需要无电池无线传感器节点（WSN）。这种自持续性是通过从太阳能和风能等传统可再生能源收集能量来实现的，但这些能源依赖于天气，而且价格昂贵。另外，以前也展示过基于微波的无线电力传输技术，但只用于传感操作，不包括物联网。在这封信中，展示了一种$\mu$Wave供电的WSN（$\mu$Wsense）硬件，以实现真正的无电池物联网传感应用。$\mu$Wsense由一个矩形天线阵列（$\mu$波接收器）、电源管理单元和BLE模块组成。波接收器的设计频率为 5.2 GHz，可在 2 米的最大测量传输范围内为 $\mu$Wsense 供电，最大实时传感间隔为 75 秒。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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