Patent ID: 7583930
Filing Date: 2009-09-01
Classification: H04B

Abstract:
1. A transmission device that induces an electric field based on data to be transmitted and transmits the data to be transmitted via the induced electric field, the transmission device comprising: a transmission means configured to transmit a modulated signal obtained by modulating the data to be transmitted with an alternating signal having a predetermined frequency, a transmission electrode configured to induce an electric field based on the modulated signal in the electric field transmission medium, a first reactance means provided between an output of the transmission means and the transmission electrode so as to cause resonance with each of parasitic capacitance produced between a ground of the transmission means and an earth ground, parasitic capacitance produced between the electric field transmission medium and the ground of the transmission means, and parasitic capacitance produced between the electric field transmission medium and the earth ground, and a second reactance means provided between the output of the transmission means and the ground of the transmission means or between the transmission electrode and the ground of the transmission means so as to cause resonance with each of the parasitic capacitances.