Electromagnetic Exposure from a WBAN and External Transmitters

A Wireless Body Area Network (WBAN) consisting of several wearable slot antennas working in the 2.4 GHz frequency band is presented. The transmission coefficients between the different wearable devices are investigated, as well as the communication links with external sources. Electromagnetic exposure levels due to the antennas of the WBAN are assessed by means of computational tools, using a human body model. Moreover, the power absorbed in the body tissues due to the wearable devices is compared to the exposure levels produced by external sources, which could communicate with one of the wearable antennas, for example by means of WiFi technology. The combined electromagnetic exposure due to more than one transmitting devices is calculated in terms of Specific Absorption Rate (SAR) and Whole-body SAR.