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Calculation of SAR and temperature in pregnant female models for a half-wavelength dipole antenna at 900 MHz and 2 GHz

We calculated the specific absorption rate (SAR) and temperature in pregnant female models exposed to a half-wavelength dipole antenna at 900 MHz and 2 GHz. In this calculation, we used Japanese pregnant female models with gestational ages of 13, 18, and 26 weeks. We placed the antenna at the position 10 mm ahead of the abdomens of the maternal bodies. The feeding points of the antenna were the heights of the centers of the fetus heads in the pregnant female models. From the calculation results, we found that the peak 10-g-averaged SARs of the fetuses were considerably lower than those of the maternal bodies, the peak 10-g-averaged SAR and the peak temperature elevations in the fetuses tended to increase with fetal growth, and the temperature elevation in the fetuses was markedly affected by the placenta.