Abstract: The power transmission sheet (22) includes a base portion (225) adhered to the surface of a wall portion (50), transfers power by wireless power supply to a plug, and has a deformable shape. This power transmission sheet (22) is provided with: an electrode layer (222c) including electrodes (222a) and electrodes (222b) arranged in an array; a wiring portion (221) for transferring power to the electrodes (222a, 222b); a covering layer (223) formed on a surface opposite to the base portion (225) adhered on the wall portion (50) as viewed from the electrode layer (222c); and an attachable structure in which a plug can be attached such that the electrode surface provided on the plug confronts the electrodes (222a, 222b) with the covering layer (223) interposed therebetween.

Abstract: The power transmitter used for wireless power supply, includes a structure in which a sheet of a conductive body forming plural layers stacked in a thickness direction in a dielectric body. The dielectric body is also located between the plural layers, and different layers of the sheet of the conductive body are electrically connected. The power transmitter easily ensures the insulation properties at a position where the electrode is disposed while improving the power transmission efficiency in the case of the wireless power supply with the electric field coupling system.

Abstract: A wireless power transfer system includes a power transmitter configured to wirelessly transfer alternating-current power components of different frequencies simultaneously, the different frequencies including at least a first frequency and a second frequency, and a power receiver having a rectifier circuit configured to convert the alternating-current power components to a direct-current power component, wherein the first frequency is 0.5 MHz to 10 GHz, and the second frequency is 10 Hz to 300 kHz lower than the first frequency.

Abstract: Provided is a composite material which is obtained by dispersing conductive filler in a polymer material, wherein an amount of the conductive filler added is 1 part by mass to 25 parts by mass with respect to 100 parts by mass of the polymer material, and wherein a relative dielectric constant of the composite material is 30 or higher and a dielectric loss tangent of the composite material is 3 or lower at an AC voltage with a frequency of 100 Hz.

Abstract: Provided is a transmission sheet constituting a transmission unit used for a non-contact power transmission system, wherein the transmission sheet comprises a functional composite material layer wherein the functional composite material layer is obtained by dispersing conductive filler in a polymer material, wherein an amount of the conductive filler added in the functional composite material layer is 90 parts by mass or less with respect to 100 parts by mass of the polymer material, and wherein a conductivity of the functional composite material layer is 10 S/m or higher.