Practical applications of universal approach for calculating maximum transfer efficiency of MIMO-WPT system

In this paper, a concise and universal method to calculate the maximum RF (radio frequency) power transfer efficiency between arbitrary multiple transmitters and multiple receivers wireless power transfer (MIMO-WPT) system is presented. The method is based on maximum Rayleigh quotient which can be d...

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Bibliographic Details
Published inWireless power transfer Vol. 7; no. 1; pp. 86 - 94
Main Authors Yuan, Qiaowei, Aoki, Takumi
Format Journal Article
LanguageEnglish
Published Cambridge Cambridge University Press 01.03.2020
Subjects
Efficiency
Eigenvalues
Impedance matrix
Load
MIMO communication
Misalignment
Receivers & amplifiers
Receiving
S matrix theory
System effectiveness
Transmitters
Wireless power transmission
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Summary:In this paper, a concise and universal method to calculate the maximum RF (radio frequency) power transfer efficiency between arbitrary multiple transmitters and multiple receivers wireless power transfer (MIMO-WPT) system is presented. The method is based on maximum Rayleigh quotient which can be deduced either from the multi-port impedance matrix Z or from the multi-port scattering matrix S. Moreover, without any limitation on the transmitting/receiving element's geometry, numbers, operating frequency, coupling method, and so on, the approach is capable to evaluate both the transfer efficiency and the maximum transfer efficiency (MTE) of any type of transmitting and receiving elements, and to obtain the optimum impedances for all transmitting or receiving ports as well. At the end of this paper, the MTEs of some typical MIMO-WPT systems will be calculated to validify the proposed method, and the effectiveness against the receiver's misalignment by using multiple transmitters will be demonstrated.
ISSN:2052-8418
2052-8418
DOI:10.1017/wpt.2020.7