volume | PIER Journals

Abstract

This work investigates low-power electromagnetic energy harvesting at 2.4 GHz and 5 GHz using an elementary rectangular patch rectenna along with a step-up DC-DC boost converter. The receiving antenna is optimized to 50 Ω impedance by tuning parasitic ground plane stubs in the resonating frequencies. The return loss and gain of the proposed antenna are -30.19 dB, -31.02 dB and 2.45 dBi, 4.84 dBi at 2.4 GHz and 5 GHz respectively. A single-stage Greinacher voltage multiplier with a compact dual-band pi-model matching circuit is proposed as a rectifier. The rectenna is manufactured on an FR4 substrate, and the measured performance is in good agreement with the simulated results. The transformation efficiency of more than 40% is noticed in the wide input-power range from -12 dBm to 5 dBm. The maximum efficiency of 50% and DC output voltage of 1.57 V at 0 dBm input power with 5.1 KΩ optimized load resistance is noticed when the RF source and rectenna are 46 cm apart. The proposed rectenna with a DC-DC boost converter can drive the LED indicator and wall clock simultaneously. The prototype rectenna is suitable for energizing low-power sensor nodes in IOT and WSN applications.

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Dr. Lalbabu Prasad

Dr. Harish Chandra Mohanta

Professor Ahmed Jamal Abdullah Al-Gburi