M Mart´nez-Burdalo et al

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(a)

(b)

(c)

Figure 4. SAR10 g distribution in a realistic human head model. (a) Adult. (b) Child 88% scaled.

(c) Child 78% scaled. Radiated power: 0.125 W. Frequency: 1800 MHz. Antenna­head distance:

2.2 cm.

to the electromagnetic radiation from a mobile phone. Moreover, the study of the absorption

inside the eye, as a critical organ, has been included. All the simulations have been made at

two frequencies, 900 and 1800 MHz, for comparison.

Peak SAR and SAR1 g show strong variations between neighbour cells of different tissues

with different dielectric characteristics; this behaviour can explain the different results obtained

by several authors relating to maximum SAR, which is always found in the surface of the

head model, where different tissues are modelled in a small region that is highly affected

by the scaling in size. Setting the radiated power to values currently used (0.250 W for