Red Tacton: Beginning of Human Area Networking

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Red Tacton is a new Human Area Networking technology that uses the surface of the human body as a safe, high speed network transmission path. Red Tacton uses
the minute electric field emitted on the surface of the human body. Technically, it is completely distinct from wireless and infrared .A transmission path is formed at the moment a part of the human body comes in contact with a Red Tacton transceiver. Physically separating ends the
contact and thus ends communication Using Red Tacton, communication starts when terminals carried by the user or embedded in devices are linked in various combinations according to the user’s Communication is possible using any body surfaces, such as the hands, fingers, arms, feet,
face, legs or torso. Red Tacton works natural, physical movements.

Capture

Using a new super-sensitive photonic electric field sensor, Red Tacton can
achieve duplex communication over the human body at a maximum speed of 10 mbps
The Red Tacton transmitter induces a weak electric field on the surface of the
body. The Red Tacton receiver senses changes in the weak electric field on the surface of the
body caused by the transmitter .Red tacton relies upon the principle that the optical properties of
an electro-optic crystal can vary according to the changes of a weak electric field. Red Tacton
detects changes in the optical properties of an electro-optic crystal using a laser and converts the
result to an electrical signal in a optical receiver circuit. The transmitter sends data by inducing
fluctuations in the minute electric field on the surface of the human body. Data is received using a
photonic electric field sensor that combines an electro-optic crystal and a laser light to detect
fluctuations in the minute electric field.

The naturally occurring electric field induced on the surface of the human
body dissipates into the earth. Therefore, this electric field is exceptionally faint and unstable.
The photonic electric field sensor developed by NTT enables weak electric fields to be measured
by detecting changes in the optical properties of an electro-optic crystal with a laser beam.

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