IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543

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An Automatic Matching High-sensitivity RF Energy Harvesting System with Tuning Power Consumption of 2.4 nW
Xiaoming LiXiting FengYabing AnHui Xu
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論文ID: 21.20240214

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This brief presents a fully integrated automatic impedance-matching RF energy harvesting system that automatically compensates for variations at the antenna-rectifier interface. The control loop is fully integrated on-chip with a low-voltage, low-power design. The design is fabricated in 0.18-μm CMOS technology, and the active chip area is 0.064 mm2. The sensitivity optimized by impedance tuning can be improved to more than -30.5 dBm for 0.7 V output at varied initial mismatches, leading to a maximum increase in sensitivity of 5 dB. The control circuit's power consumption is only 2.4 nW, and the minimum supply voltage is 416 mV.

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