Characterization and analysis of intra-body communication channel

In this work, the experiment setup of EF-IBC is studied. An effective setup is developed to preserve the parasitic return path in EF-IBC. Characteristics of every component in an EF-IBC system are measured or derived through a combination of experiments. The measured EF-IBC channel shows a bandpass profile with a center frequency around 42 MHz. The channel bandpass profile is mainly determined by the capacitive parasitic return path and the capacitive PCB leakage path. Below 100 MHz, the body appears to be a uniform attenuator with about 15 dB loss at the distance of 15 cm between TX and RX. The channel characteristics are recombined by all the components, and match well with the direct measurement results, which verifies the decomposition method.