Demonstration of Three-Dimensional Near-Field Beamforming by Planar Loop Array for Magnetic Resonance Wireless Power Transfer
- Authors
- Choi, Bo-Hee; Lee, Jeong-Hae
- Issue Date
- Aug-2017
- Publisher
- IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
- Keywords
- magnetic resonance beamforming; three dimensional beamforming; wireless power transfer (WPT); selective WPT; alignment free WPT
- Citation
- IEICE TRANSACTIONS ON COMMUNICATIONS, v.E100B, no.8, pp.1449 - 1453
- Journal Title
- IEICE TRANSACTIONS ON COMMUNICATIONS
- Volume
- E100B
- Number
- 8
- Start Page
- 1449
- End Page
- 1453
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/5456
- DOI
- 10.1587/transcom.2016EBP3416
- ISSN
- 0916-8516
- Abstract
- This paper presents a capacitor-loaded 4x4 planar loop array for three-dimensional near-field beamforming of magnetic resonance wireless power transfer (WPT). This planar loop array provides three important functions: beamforming, selective power transfer, and the ability to work alignment free with the receiver. These functions are realized by adjusting the capacitance of each loop. The optimal capacitance of each loop that corresponds to the three functions can be found using a genetic algorithm (GA); the three functions were verified by comparing simulations and measurements at a frequency of 6.78 MHz. Finally, the beamforming mechanism of a near-field loop array was investigated using the relationship between the current magnitude and the resonance frequency of each loop, resulting in the findings that the magnitude and the resonance frequency are correlated. This focused current of the specified loop creates a strong magnetic field in front of that loop, resulting in near-field beamforming.
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Collections - College of Engineering > School of Electronic & Electrical Engineering > 1. Journal Articles
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