A Compact 3-D Multisector Orientation Insensitive Wireless Power Transfer System

• Published in: IEEE microwave and wireless technology letters (Print) Vol. 33; no. 3; pp. 363 - 366
• Main Authors: Kumar, Manoj, Kumar, Sundeep, Sharma, Ashwani
• Format: Journal Article
• Language: English
• Published: IEEE 01.03.2023
• Subjects: Angular misalignment; antenna array; Antenna measurements; Azimuth; internet of things (IoT); multisector wireless energy harvesting; Patch antennas; Power measurement; Radio frequency; Voltage measurement; Wireless sensor networks; wireless sensor nodes
• ISSN: 2771-957X; 2771-9588
• DOI: 10.1109/LMWC.2022.3212599

The power conversion efficiency (PCE) in wireless power transfer (WPT) degrades due to angular misalignment between the transmitter (Tx) and the rectenna (Rx) along the azimuth plane. Therefore, a compact 3-D multisector orientation insensitive WPT system is proposed to address this problem. The optimal number of sectors (<inline-formula> <tex-math notation="LaTeX">N=8 </tex-math></inline-formula>) is determined analytically using patch antenna design equations to mitigate the effects of angular misalignment. In addition, conditions on the receiver antenna radiation pattern are investigated to enhance the performance of the WPT system. Furthermore, the observed conditions are utilized for designing a high gain WPT system at 5.8 GHz with <inline-formula> <tex-math notation="LaTeX">N=8 </tex-math></inline-formula> sectors. The proposed WPT system provides uniform power harvesting capability in the azimuth plane and 51.2% higher power harvesting capacity than the patch antenna WPT system.