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无源低功耗无线电磁能量收集器的优化。

Optimization of passive low power wireless electromagnetic energy harvesters.

机构信息

Department of Microsystems Engineering, Laboratory for Electrical Instrumentation, University of Freiburg, IMTEK, Georges-Köhler-Allee 106, 79110 Freiburg, Germany.

出版信息

Sensors (Basel). 2012 Oct 11;12(10):13636-63. doi: 10.3390/s121013636.

DOI:10.3390/s121013636
PMID:23202014
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3545585/
Abstract

This work presents the optimization of antenna captured low power radio frequency (RF) to direct current (DC) power converters using Schottky diodes for powering remote wireless sensors. Linearized models using scattering parameters show that an antenna and a matched diode rectifier can be described as a form of coupled resonator with different individual resonator properties. The analytical models show that the maximum voltage gain of the coupled resonators is mainly related to the antenna, diode and load (remote sensor) resistances at matched conditions or resonance. The analytical models were verified with experimental results. Different passive wireless RF power harvesters offering high selectivity, broadband response and high voltage sensitivity are presented. Measured results show that with an optimal resistance of antenna and diode, it is possible to achieve high RF to DC voltage sensitivity of 0.5 V and efficiency of 20% at -30 dBm antenna input power. Additionally, a wireless harvester (rectenna) is built and tested for receiving range performance.

摘要

本工作针对使用肖特基二极管将天线捕获的低功率射频 (RF) 转换为直流 (DC) 电源的优化，为远程无线传感器供电。使用散射参数的线性化模型表明，天线和匹配的二极管整流器可以被描述为具有不同个体谐振器特性的耦合谐振器的一种形式。分析模型表明，耦合谐振器的最大电压增益主要与天线、二极管和负载（远程传感器）在匹配条件或谐振时的电阻有关。分析模型通过实验结果得到了验证。本文提出了不同的无源无线射频功率收集器，具有高选择性、宽带响应和高电压灵敏度。测量结果表明，在天线和二极管的最佳电阻下，在 -30 dBm 天线输入功率下，实现了 0.5 V 的高 RF 至 DC 电压灵敏度和 20%的效率。此外，还构建并测试了一个无线收集器（整流器），以接收范围性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/59ac/3545585/0a4de4397179/sensors-12-13636f21.jpg
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