An improved rectifier based on harmonic rejection filter with inter‐digital capacitor for RF energy harvesting application is proposed. The designed circuit is fabricated on a low cost FR‐4 substrate, and works at GSM/CDMA 900 MHz band. The measured maximum efficiency is 66.31% and maximum obtained power is 15.13 mW at 1.1 KΩ load value. The overall dimension of circuit is 80 × 45 × 1.6 mm3, which can be easily implemented in any device for energizing wireless sensor network.
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Chandravanshi et al. (2017) studied this question.
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