Far-End Reactor Matching to a Traveling Load Along an RF Power Transmission Line

Sonshu SAKIHARA  Satoshi KITABAYASHI  Naoki SAKAI  Takashi OHIRA  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E101-A   No.2   pp.396-401
Publication Date: 2018/02/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E101.A.396
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
wireless power transfer,  impedance matching,  variable reactor,  standing waves,  moving load,  

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This paper presents a novel circuit for impedance matching to a load moving along a transmission line. This system is called FERMAT: Far-End Reactor MATching. The FERMAT consists of a power transmission line and a variable reactor at its far-end. The proposed system moves standing-wave antinodes to the position of the vehicle in motion. Therefore, the moving vehicle can be fed well at any position on the line. As a theoretical result, we derive adjustable matching conditions in FERMAT. We verified that the experimental result well agrees with the theory.