Abstract

L-matching networks have been proposed for boosting the power efficiency of radiofrequency (RF) energy harvesters. This paper shows that power efficiency is maximized by fine-tuning the components of the L-matching network and the load. Simulations at 868MHz with commercial components and a Rogers substrate resulted in maximum power efficiencies of 10.9%, 30.7%, and 55.2% for input powers of -30 dBm, -20 dBm, and -10 dBm, respectively. Experimental results showed efficiencies of 31.8% and 52.0% at -20 dBm and -10 dBm, respectively, close to the simulation results, but at a frequency of 814MHz.

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