Patent ID: 7853208

Claim:
A communication system, comprising: a transmitter having a transmitting circuit unit to generate a RF signal for data transmission and an electric-field-coupling antenna to send out the RF signal as an induction field and/or an electrostatic field; a receiver having an electric-field-coupling antenna and a receiving circuit unit to receive and process a RF signal received by the electric-field-coupling antenna; and a coupling apparatus having at least one transmitter-side electric-field-coupling antenna to receive the RF signal which is in capacitive coupling with the transmitter-side electric-field-coupling antenna and outputted from the electric-field-coupling antenna, a signal line to transmit the received RF signal, and at least one receiver-side electric-field-coupling antenna to output the RF signal which is in capacitive coupling with the receiver-side electric-field-coupling antenna and transmitted through the signal line.