  With increasing interest in millimeter wave wireless communications,
investigations on interactions between the human body and millimeter wave
devices are becoming important. This paper gives examples of current regulatory
requirements, and provides an example for a 60 GHz transceiver. Also, the
propagation characteristics of millimeter-waves in the presence of the human
body are studied, and four models representing different body parts are
considered to evaluate thermal effects of millimeter-wave radiation on the
body. Simulation results show that about 34% to 42% of the incident power is
reflected at the skin surface at 60 GHz. This paper shows that power density is
not suitable to determine exposure compliance when millimeter wave devices are
used very close to the body. A temperature-based technique for the evaluation
of safety compliance is proposed in this paper.
