B. T. Malik, V. Doychinov, S. A. R. Zaidi, I. Robertson, N. Somjit, R. Richardson, N. Chudpooti
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Flexible Rectennas for Wireless Power Transfer to Wearable Sensors at 24 GHz
This paper presents the design and implementation of efficient & compact flexible rectennas (antenna + rectifier) for wireless power transfer to wearable IoT sensor nodes at 24 GHz. Two different rectifier configurations i.e. shunt and voltage doubler have been analyzed for performance comparison. Experimental results of complete rectenna have also been demonstrated for conformal surfaces. The proposed flexible rectifiers is fabricated through conventional PCB manufacturing method. Measured RF-DC conversion efficiency of 31% and DC voltage of up to 2.4 V is achieved for 20 dBm input power across an optimal load resistance of 300Ω at 24 GHz.
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