Patent ID: 7907895

Claim:
A transceiver comprising: a transmitting and receiving electrode that induces an electric field in an electric field transmission medium, and receives the electric field induced in said electric field transmission medium; a transceiver main body that generates said electric field based on information to be transmitted in said transmitting and receiving electrode, and converts said electric field generated in said transmitting and receiving electrode into reception information, thereby transmitting and receiving information via said electric field transmission medium; a first structure that is interposed between said transmitting and receiving electrode and said electric field transmission medium; an insulating case that accommodates said transceiver main body, wherein said transmitting and receiving electrode is continuously provided on a bottom and a side of an external wall surface of said insulating case, so that said transmitting and receiving electrode is adapted to allow said electric field transmission medium to closely approach the bottom and the side; a second structure that is interposed between said transceiver main body and said insulating case; a battery that drives said transceiver main body; a third structure that is interposed between said transceiver main body and said battery, wherein said first, said second, and said third structures are composed of an insulator, and are equivalent to a parallel circuit of a resistor and a capacitor; and a ground electrode that is attached to an internal wall surface of said insulating case, wherein said transmitting and receiving electrode prevents said electric field transmission medium from being electrically coupled to said ground electrode.