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Extendable Array Rectenna for a Microwave Wireless Power Transfer System
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DOI：10.1109/ACCESS.2021.3095538.png)
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In this study, a rectenna is adopted in a microwave-based wireless power transfer system to rectify the received radio frequency (RF) to DC power. Each rectenna comprises a DC-DC converter at the DC output port to ensure a stable power supply and a Schottky diode for the DC-combining network. The results indicate that the RF-DC conversion efficiencies of the rectifier circuit and 4 x 1 rectenna were 71% and 71.2% when the unit-cell RF input levels were 19 dBm and 19.6 dBm, respectively. Furthermore, the DC output levels of a 4 x8 rectenna with and without the DC-DC converter were 28 V and 30 V, respectively, when the unit-cell RF input level was 20.2 dBm. Additionally, the RF-DC conversion efficiencies were 52.6% and 59.9% with and without the DC-DC converter, respectively. Thus, we experimentally verified that the Schottky diode combined with the DC-DC converter at the DC output port can increase the DC power combining level, making it suitable as an extendable array rectenna system.
Keyword:
Rectenna
Schottky diodes
wireless power transmission
期刊
IF:
3.6
论文数:
9.8W
被引数:
29.4W
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5.8 GHz High-Efficiency RF-DC Converter Based on Common-Ground Multiple-Stack Structure基于共地多堆结构的5.8 GHz高效射频直流变换器.png)
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