Patent ID: 8213859
Filing Date: 2012-07-03
Classification: H04B

Abstract:
1. A data communication system comprising: a sender including modulation means configured to modulate an information signal into an electric field; a receiver including demodulation means configured to demodulate the electric field into the information signal; a transmission medium configured to transmit the information signal via the electric field and take along the sender or the receiver; and a floor cover arranging the sender or the receiver as a stationary device and also being contacted by the transmission medium, wherein the floor cover has a communication area contacted by the transmission medium at the time of performing a data communication between the sender and the receiver, wherein the communication area is in a state of being electrically floating with respect to a ground of the floor cover, wherein an electrostatic capacitance between the communication area contacted by the transmission medium and the ground is equal to or smaller than an electrostatic capacitance between the receiver and the transmission medium, and wherein an electrostatic capacitance between the communication area contacted by the transmission medium and the ground is equal to or smaller than 10 pF.