Patent ID: 8340575
Filing Date: 2012-12-25
Classification: G01R,H01Q,H04B

Abstract:
1. A communication system comprises a transmitter, which applies transmission signals produced by modulating communication information to the conductive transmission medium and induces an electric field in the vicinity of the transmission medium, and a receiver, which demodulates a detected strength of electric field into communication information, wherein the receiver comprises an a electric field detecting unit for detecting the strength of the electric field induced by the transmission medium, wherein the electric field detection unit unite comprises: a receiving electrode, which the transmission medium comes close to or contacts during communication between the transmitter and the receiver, a coil, a sensor electrode electrically isolated from the coil and placed close to a central opening of the coil, and a conductive wire connecting the receiving electrode and the sensor electrode, and wherein the coil outputs signals indicating the strength of the electric field acting upon the receiving electrode, wherein the electric field detecting unit has a magnetic body core inserted in the central opening of the coil and the sensor electrode is adhered to the end face of the magnetic body core.