Electromagnetic Energy Absorption and Its Distribution for Man and Animals at Different Frequencies under Various Conditions.

The whole-body absorption of electromagnetic waves by biological bodies is strongly dependent on the orientation of the electric field E relative to the longest dimension L of the body. The highest rate of energy deposition occurs for E parallel L orientation for frequencies 65-70 MHz for an adult human being such that the major length is approximately 0.36 to 0.4 times the free-space wavelength. Peaks of whole-body absorption for the other two configurations major length oriented along the direction of propagation K parallel L or along the vector of the magnetic field H parallel L occur for wavelength on the order of 4 pi b, where 2 pi b is the weighted average circumference of the animals. Numerical calculations for a realistic block model of man shown a fine structure to whole-body absorption at frequencies higher than the whole-body resonant frequency. Minor peaks in the supraresonance region are ascribed to maxima of energy deposition in the various body parts such as the arm and the head. For the E parallel L, supraresonant region, an average 1f dependence of the whole-body absorbed dose is obtained theoretically and experimentally to frequencies on the order of 4-8 times the resonance frequency.