Study on Impedance Matching and Maximum Wireless Power Transfer Efficiency of Circuits with Resonant Coupling Based on Simplified S-matrix

Hiroya Andoh; Keita Tsuzuki; Dai Oikawa; Toko Sugiura; Takehiko Tsukamoto; Koichi Maezawa

doi:10.1587/elex.16.20190156

This article has now been updated. Please use the final version.

Study on Impedance Matching and Maximum Wireless Power Transfer Efficiency of Circuits with Resonant Coupling Based on Simplified S-matrix

Hiroya Andoh, Keita Tsuzuki, Dai Oikawa, Toko Sugiura, Takehiko Tsukamoto, Koichi Maezawa

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Keywords: S-matrix, impedance matching, kQ-product, maximum efficiency

JOURNAL FREE ACCESS Advance online publication

Article ID: 16.20190156

DOI https://doi.org/10.1587/elex.16.20190156

The final version of this article is now available: Vol. 16 (2019), No. 11 pp. 20190156-20190156

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Abstract

In this manuscript, the simplified S-matrix of the pair of RLC circuits with resonant coupling at the resonant frequency is revealed. All of the elements of the S-matrix (S-parameters) are expressed by using essential quantities, which are the port-impedance / resistance ratios and the kQ-product. The matching condition and the maximum power transfer efficiency are analytically derived from the elements of the simplified S-matrix.

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