Modeling of the test fixtures to improve the HBC channel interpretation

The Human Body Communication (HBC) presents security, power and interference advantages over common RF methods, which makes it an interesting alternative to implement body area networks. This paper presents a modeling attempt that takes into account the fixture influences present on the HBC channel characterization. An extended model, that includes the traditional primary channel model clearly identified, and the model of measurement accessories is proposed to better explain the measured channel responses. The model was tested against channel measurement and good results were obtained for frequencies below 70 MHz.