The first resonance of a grounded human being exposed to electric fields

Gandhi et al. (1986) have described the results of measurements of the current induced in a human being exposed to electric fields at frequencies between 0 and 50 MHz. For far-field exposure over a ground plane, a resonance in the induced current was observed at 40 MHz; the corresponding current was 12.5 mA/(V/m) for a 1.75-m-tall human being. Increased energy absorption associated with this resonance was predicted by Korniewicz in 1974. At that time calculations were carried out for a cylindrical model of the human body with its external inductance and capacitance and its internal resistance and capacitance. In this paper the resonance frequency and current are described for the same model but with an improved electrical equivalent circuit that includes the radiation resistance of the cylinder. Resonance conditions calculated for this model, 40.40 MHz, 129 mA/(V/m), are in excellent agreement with the measurements reported by Gandhi et al