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首页> 外文会议>IEEE MTT-S International Microwave Symposium >Broadband RF energy harvesting system covering CDMA, GSM900, GSM1800, 3G bands with inherent impedance matching
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Broadband RF energy harvesting system covering CDMA, GSM900, GSM1800, 3G bands with inherent impedance matching

机译：宽带射频能量采集系统，覆盖CDMA，GSM900，GSM1800、3G频段并具有固有阻抗匹配

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摘要

A broadband RF energy harvesting system for harvesting energy from 800 MHz to 2.5 GHz is presented. A passive voltage amplification scheme and inherent matching technique using higher antenna impedance is employed to enhance the output voltage of the rectifier. A planar broadband folded dipole antenna having an input impedance of 300Ω is designed and fabricated. The measured VSWR is less than 2 from 825 MHz to 1.27 GHz and 1.67 GHz to 2.17 GHz. A RF energy harvesting system consisting of the high impedance antenna, Schottky diode based rectifier and a self oscillating boost converter is used to charge a 12 μAh battery to 3.8 V. At 844 MHz for a received power of -10.7 dBm the battery charges to 3.8 V. At 1.73 GHz the battery charges to 3.8 V for a received power of -5.72 dBm. Also using the designed RF energy harvesting system, a voltage of 4.4 V is measured for a load of 3 kΩ at 10 cm from a cell phone making a call.
机译：提出了一种宽带RF能量收集系统，用于收集800 MHz至2.5 GHz的能量。采用无源电压放大方案和使用较高天线阻抗的固有匹配技术来提高整流器的输出电压。设计并制造了一种具有300Ω输入阻抗的平面宽带折叠偶极天线。在825 MHz至1.27 GHz和1.67 GHz至2.17 GHz范围内，测得的VSWR小于2。 RF能量收集系统由高阻抗天线，基于肖特基二极管的整流器和自激升压转换器组成，用于将12μAh电池充电至3.8V。在844 MHz下，接收到的功率为-10.7 dBm，电池充电至3.8 V。在1.73 GHz时，电池充电至3.8 V，接收到的功率为-5.72 dBm。同样，使用设计的RF能量收集系统，在距拨打电话的手机10 cm处3kΩ的负载下测得的电压为4.4V。

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