| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a proximity power feeding and communication device capable of performing power feeding from a base station side to a portable device side, and increasing communication speed between a base station and a portable device, and expanding a communication service area. <P>SOLUTION: A base station comprises: an LF transmission antenna 1 and an LF transmission circuit 2 for performing proximity power feeding to a portable device with the use of an LF signal, and also for transmitting the LF signal to the portable device; a UHF reception antenna 3 and a UHF reception circuit 4 for receiving a UHF response signal from the portable device; and a base station side control circuit 5. The portable device generates electricity by receiving a radiation magnetic field caused by an electromagnetic wave of the LF signal from the base station, and transmits the UHF response signal to the base station. The base station side control circuit 5 and a portable device side control circuit control transmission and reception timing of the base station and the portable device by taking spatial propagation delay into account so that noise will not occur caused by the LF signal or the UHF response signal sneaking into a reception circuit side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
