An Electro-Magnetic Energy Harvesting System With 190 nW Idle Mode Power Consumption for a BAW Based Wireless Sensor Node
An Electro-Magnetic Energy Harvesting System With 190 nW Idle Mode Power Consumption for a BAW Based Wireless Sensor Node
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DOI：
10.1109/jssc.2011.2144390
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发表时间：
2011-07-01
影响因子：
5.4
通讯作者：
Holweg, Gerald
中科院分区：
文献类型：
--
作者：
Reinisch, Hannes;Gruber, Stefan;Holweg, Gerald
最先进的无线传感器节点主要由电池供电。这种系统的缺点是，由于电池的使用寿命有限，它们不能免维护。相反，无线传感器节点或相关设备可以远程供电。为了增加这些远程供电设备的工作范围和适用性，我们采用 0.13 μm 低成本 CMOS 技术开发了电磁能量采集器。本文提出了一种能量收集系统，可将射频功率转换为直流功率，为无线传感器节点、有源发射器或功耗高达毫瓦范围的相关系统供电。该能量收集系统用于通过 900 MHz 射频场为无线传感器节点供电。该无线传感器节点包括片上温度传感器和基于体声波 (BAW) 的发射器。 BAW 谐振器将发射器的启动时间缩短至约 2 μs，从而减少了一个发射周期所需的能量。发射机的最大输出功率为5.4 dBm。该芯片包含超低功耗控制单元，空闲模式下功耗仅为 190 nW。所需的输入功率为-19.7 dBm。
State-of-the-art wireless sensor nodes are mostly supplied by batteries. Such systems have the disadvantage that they are not maintenance free because of the limited lifetime of batteries. Instead, wireless sensor nodes or related devices can be remotely powered. To increase the operating range and applicability of these remotely powered devices an electro-magnetic energy harvester is developed in a 0.13 mu m low cost CMOS technology. This paper presents an energy harvesting system that converts RF power to DC power to supply wireless sensor nodes, active transmitters or related systems with a power consumption up to the mW range. This energy harvesting system is used to power a wireless sensor node from the 900 MHz RF field. The wireless sensor node includes an on-chip temperature sensor and a bulk acoustic wave (BAW) based transmitter. The BAW resonator reduces the startup time of the transmitter to about 2 mu s which reduces the amount of energy needed in one transmission cycle. The maximum output power of the transmitter is 5.4 dBm. The chip contains an ultra-low-power control unit and consumes only 190 nW in idle mode. The required input power is -19.7 dBm.