Patent ID: 8711909

Claim:
A communication device that carries out communication using a two-dimensional communication medium, comprising: a connector configured to receive any one of a first transmission wave produced by superposing a signal with a transmission frequency of said two-dimensional communication medium on power with said transmission frequency, a second transmission wave including other signal with said transmission frequency, and a third transmission wave including other power with said transmission frequency through said two-dimensional communication medium; a signal processing circuit; and an interface device configured to carry out reception processing on said signal and reception processing on said power independently from each other based on said first transmission wave, to output said processed signal to said signal processing circuit, and to store said processed power, when said connector receives said first transmission wave, wherein said interface device is configured to carry out reception processing on said second transmission wave and to output said other signal to said signal processing circuit when said connector receives said second transmission wave, said interface device is configured to store said third transmission wave as other power when said connector receives said third transmission wave, and said connector is configured to receive said first or second transmission wave from said two-dimensional communication medium, and said interface device includes: a communication unit configured to carry out reception processing on said signal and to output the processed signal to said signal processing circuit; a power receiving unit configured to carry out reception processing on said power and to store the processed power; a separation circuit configured to separate said first transmission wave into said signal and said power, to output the separated signal to said communication unit, and to output the separated power to said power receiving unit; and a switch circuit configured to connect said connector to said separation circuit when said connector receives said first transmission wave and said connector to said communication unit when said connector receives said second transmission wave.