Figure 2
From: Enabling Covert Body Area Network using Electro-Quasistatic Human Body Communication
(a–d) Time-domain Measurements of capacitive EQS-HBC Quasi-static Leakage (QSL) using Oscilloscope with the transmitter wearable device on the device arm. (a,b) Simplified experimental set-ups to measure the QS leakage from the device and free hands respectively. (c,d) Voltage Correlational analysis of the measured QS leakage for the device and free hands respectively, with varying angles (θ) and distances (d) between the antenna and the hands. The measured QS leakage from the device hand is dominated by the leakage due to the EQS-HBC transmitter, while the free hand leakage corresponds to QS leakage due to the human body (HB) alone.
