Intra-body communication apparatus provided with magnetic induction wireless communication circuit performing wireless communications using magnetic induction

A communication apparatus comprising:

• an antenna coil configured to transmit and receive a magnetic induction signal;
• a magnetic induction wireless communication circuit configured to wirelessly communicate the magnetic induction signal by using magnetic induction;
• an electrode for a human body;
• and
• a switching device configured to connect or disconnect a communication between the magnetic induction wireless communication circuit and the electrode for the human body,
• wherein when the switching device connects the magnetic induction wireless communication circuit with the electrode for the human body, the magnetic induction signal is transmitted from the magnetic induction wireless communication circuit to the human body via the electrode for the human body, and
• wherein a carrier frequency of the magnetic induction signal transmitted to the human body is equal to a carrier frequency of the magnetic induction signal propagating in the magnetic induction wireless communication circuit.

A communication method using a human body, comprising steps of:

• receiving a magnetic induction signal from communication equipment at an antenna coil, the magnetic induction signal being carried by a wave having a carrier frequency;
• transmitting the received magnetic induction signal via a resonance circuit including the antenna coil to an electrode for a human body and then to the human body,
• wherein the resonance circuit resonates at the carrier frequency, and
• wherein the received magnetic induction signal is transmitted at the carrier frequency, and a frequency of the magnetic induction signal is not converted or changed from the antenna coil to the electrode for a human body.