Multiposture Microwave Power Transmission WithbDual Alignment of Transmitting and Receiving Beams by Forward and Backward Time Reversal
Hu, Lin (University of Electronic Science and Technology of China)
Ma, Xin (University of Electronic Science and Technology of China)
Ning, Zhongyao (University of Electronic Science and Technology of China)
Parrón Granados, Josep (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Paco Sánchez, Pedro Antonio de (Universitat Autònoma de Barcelona. Departament de Telecomunicació i Enginyeria de Sistemes)
Zhao, Deshuang (University of Electronic Science and Technology of China)
Wang, Bing-Zhong (University of Electronic Science and Technology of China)

Date:	2024
Abstract:	In actual microwave power transmission (MPT) scenarios such as smart factory, the system efficiency and output dc power will decrease when the receiving antenna array of the multi-posture receiver does not face the transmitting antenna. To address the challenge of efficiently transmitting energy from the transmitter to a multiposture receiver, a multiposture MPT scheme based on forward and backward time reversal (TR) is proposed. This letter introduces phase shifters in the multiposture receiver, enabling the beam of a receiver to have steering capabilities. Importantly, inspired by the adaptive beam alignment characteristic of TR, the phase shifters of a receiver are configured to align the beam of the offset receiver with the transmitter using the backward TR method, while the phase shifters of the transmitter are configured to align the beam of the transmitter with the receiver using the forward TR method. So, dual alignment of the transmitting and receiving beams is achieved. A prototype of the multiposture MPT system is established. The experiment results show that the output dc power of the multiposture MPT scheme is 30. 6 dB higher than the traditional MPT scheme when the multiposture receiver changes its orientation, demonstrating the effectiveness of the multiposture MPT scheme.
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Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Receiving antennas ; Transmitting antennas ; Antenna arrays ; Phase shifters ; Voltage-controlled oscillators ; Microwave antenna arrays ; Directive antennas
Published in:	IEEE antennas and wireless propagation letters, Vol. 23, Issue 11 (November 2024) , p. 3792-3796, ISSN 1536-1225

DOI: 10.1109/LAWP.2024.3364236

Available from: 2026-11-30 Postprint

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