Patent ID: 7668122
Filing Date: 2010-02-23
Classification: H04B

Abstract:
1. A communication apparatus using a transmission medium, comprising: at least one conductive transmission medium; at least one receiving means configured to generate a transmission request signal for requesting required information data, the transmission request signal to be transmitted through the transmission medium; at least one transmission means configured to receive the transmission request signal and to transmit the required information data to the receiving means through the transmission medium; a switch connected to the transmission means and the receiving means to separate transmit signals output from the transmission means and receive signals input to the receiving means; the switch protecting the receiving means from the transmit signals having a large amplitude; and an electrode connected between the transmission medium and the switch to communicate the transmit/receive signals through the transmission medium; wherein time division duplexing (TDD) is used to prevent an interference between the transmit signals and the receive signals.