On a pulse response of a capacitive intrabody communication channel

Intrabody communication (IBC) uses the human body as a signal transmission medium. In this paper we examine the pulse response of the capacitive intrabody communication channel for two different electrode configurations (electrode pairs A and B). As an excitation signal we use 0 dBm square wave signals with 1 MHz, 10 MHz, and 40 MHz frequency. Transmitter-receiver distance was set to 4 cm, 16 cm, 28 cm, 36 cm, and 120 cm. The received signals for both electrode configurations were positive and negative pulses with the duration much shorter than the original square wave signal. We have compared the amplitudes and durations of the received signals. The amplitude was higher for the electrode pair B configuration. The duration of the impulses was the same for 1 MHz and 10 MHz regardless of the other parameters, and for the 40 MHz signal it equaled the half-period of the generated pulse.