ANTENNA DEVICE, POWER TRANSMISSION DEVICE, AND POWER RECEPTION DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce a resistance of an antenna conductor.SOLUTION: An antenna part 40 in a wireless power transmission system 1 consisting of a power reception device 20 and a power transmission device 10 for transmitting power to the power reception device 20 wirelessly has a dielectric substrate 41, and an antenna conductor 42 formed on the dielectric substrate 41 in an annular shape or a spiral shape. On the antenna conductor 42, grooves 51 are formed on at least any one of an upper surface, a lower surface and a lateral face in an extending direction of the antenna conductor 42. A groove interval of the grooves 51 is twice or more larger than a skin depth.SELECTED DRAWING: Figure 1