Optimal Waveforms for Efficient Wireless Power Transmission

• Published in: IEEE microwave and wireless components letters Vol. 24; no. 5; pp. 354 - 356
• Main Authors: Collado, A., Georgiadis, A.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.05.2014; Institute of Electrical and Electronics Engineers
• Subjects: Antennas; Applied sciences; Circuits; Constants; Conversion; Energy harvesting; Exact sciences and technology; Microwaves; Peak to average power ratio; Power transmission; Radiocommunications; Receiving; rectenna; rectifier; Rectifiers; Telecommunications; Telecommunications and information theory; Time-domain analysis; Waveforms; White noise; Wireless communication; Wireless power transmission; Chaos; Performance evaluation; Rectifier; Conversion rate; Rectifying circuits; Peak to average power ratio; Energy recovery; Wireless electricity; Single carrier; Energy harvesting; wireless power transmission; Rectennas; Time domain method; White noise; Orthogonal frequency division multiplexing; rectenna; Comparative study
• ISSN: 1531-1309; 1558-1764
• DOI: 10.1109/LMWC.2014.2309074

This work shows how using specifically selected or designed waveforms in wireless power transfer (WPT) systems can lead to improved RF to dc conversion efficiency in rectifier circuits in the receiving end of these systems. Signals with different time domain waveforms are considered such as OFDM, white noise and chaotic waveforms, and the performance of a rectifier circuit operating at 433 MHz is evaluated when using these signals in comparison to a single carrier constant envelope signal. The performed experiments show that selecting high peak to average power ratio (PAPR) signals lead to improved RF-DC conversion efficiency in rectifier circuits.