A Wideband Strongly Coupled Magnetic Resonance Wireless Power Transfer System and Its Circuit Analysis

Authors :: Shao Ying Huang
Peng Yang
Srikumar Sandeep
Pengde Wu
Wenwei Yu
Wenshen Zhou
Source :: IEEE Microwave and Wireless Components Letters. 28:1152-1154
Publication Year :: 2018
Publisher :: Institute of Electrical and Electronics Engineers (IEEE), 2018.
Abstract: Conventional strongly coupled magnetic resonance (SCMR) wireless power transfer (WPT) systems have high quality factor ( $Q$ ), leading to limited system bandwidths. In practical applications, especially in human-involved environments, the resonant frequency of SCMR resonators will shift due to the effect of highly dielectric human body. In this letter, a wideband four-coil SCMR WPT system is proposed by improving the coupling between the tx/rx coil and their corresponding resonators. The bandwidth is increased by over 100% compared to a conventional system without sacrificing the efficiency much. The wideband feature is demonstrated by both simulation and measurement. It is analyzed physically and by using an equivalent circuit analysis.

Subjects :: Physics
020208 electrical & electronic engineering
Bandwidth (signal processing)
020206 networking & telecommunications
02 engineering and technology
Dielectric
Condensed Matter Physics
Resonator
Electromagnetic coil
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
Equivalent circuit
Wireless power transfer
Electrical and Electronic Engineering
Wideband
Network analysis

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