NON-CONTACT POWER TRANSMISSION SYSTEM HAVING MILLIMETER WAVE COMMUNICATION FUNCTION AND NON-CONTACT POWER TRANSMISSION METHOD

PROBLEM TO BE SOLVED: To enable an authentication operation for avoiding interference between devices to be carried out with a simple structure while inhibiting radiation of electromagnetic waves to an unnecessary region by minimizing communication.SOLUTION: A non-contact power transmission system includes: a power transmission device 1 having a power transmission part 3 that is formed using a power transmission coil 9 and a power transmission communication part 4; and a power reception device 2 having a power reception part 6 that is formed using a power reception coil 14 and a power reception communication part 7. The non-contact power transmission system is formed so as to conduct non-contact power transmission from the power transmission device to the power reception device through action between the power transmission coil and the power reception coil and also conduct mutual communication. The power transmission communication part and the power reception communication part respectively include milli-wave band antennae 10, 16 operated in milli-wave bands and milli-wave band communication control parts 13, 19 operated in milli-wave bands. After an authentication operation, which is conducted by communication between the milli-wave band communication control parts through the milli-wave band antennae, is properly conducted, the non-contact power transmission is conducted.