WIRELESS POWER SUPPLY DEVICE

A wireless power supply device includes: a power transmitting antenna; a power supply circuit configured to supply a microwave to the power transmitting antenna; a power receiving antenna; a power receiving circuit configured to receive supply of power of the microwave via the power receiving antenna; a load configured to operate using the power supplied by the power receiving circuit; and an electrically-conductive case surrounded by an electrically-conductive plate in which the power transmitting antenna and the power receiving antenna are accommodated. In the electrically-conductive case, a microwave radiated from the power transmitting antenna is received by the power receiving antenna, and power of the microwave is supplied to the load from the power receiving circuit.