| 摘要 |
PROBLEM TO BE SOLVED: To provide a small-sized portable terminal device mounting an antenna for non-contact communication and reception of power transmitted in a non-contact manner.SOLUTION: A non-contact power transmission system comprises: a power transmission device 420 for transmitting power in a non-contact manner; and a power reception device (portable terminal device 702) for receiving power from the power transmission device 420 in a non-contact manner. The power reception device comprises: a resonant coil 401; and a load coil 402 which are magnetically coupled with each other. The resonant coil 401 and a first resonant circuit 403 which resonates at a first frequency, are connected, and, to it, a second resonant circuit 405 which resonates at a second frequency is connected via a filter 404, to form first output terminals. The filter 404 allows a signal having the second frequency (for example, 100 kHz) to pass therethrough and inhibits a signal having the first frequency (for example, 13.56 MHz) from passing therethrough. The signal having the second frequency is output from the first output terminals. The load coil 402 outputs the signal having the first frequency by magnetically coupling with the resonant coil 401. |
