article · International Journal of Microwave and Wireless Technologies
Abstract This paper presents the design, optimization, fabrication, and measurement of three RF-to-DC rectifiers operating at 3.5 GHz for wireless power transfer and RF energy harvesting applications. A low-power rectifier achieves a peak efficiency of 50.5% at -2 dBm, while a high-power rectifier reaches 61.2% at 15 dBm. To extend the operating range, a wide-range rectifier based on a passive dynamic sub-rectifier selection architecture is proposed. The developed system achieves a maximum efficiency of 54.7% at 16 dBm and maintains over 20% efficiency across a 41 dB input power range. Experimental results validate the proposed designs and show good agreement with simulations.
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DOI: 10.1017/s1759078726103237
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