A study on the evaluation of the electromagnetic exposure in the human fetus model at 150 MHz

Many researchers have been conducted on the estimation of the SAR in the human body at many situations. However, little is known about the EM exposure in the human fetus, which is caused by the radiation from mobile communication devices Therefore, in this paper, we investigate the EM exposure in the human fetus model, which is calculated by the FDTD method using three types of fetus models close to the 0.18/spl lambda/ dipole antenna at 150 MHz. As a result, it has been confirmed that the local SARs and the SAR distribution in the body of pregnant women are hardly due to the fetus size. Moreover, the increase in the local SARs at the fetus are proportional to the increase in the fetus size. Furthermore, the local 10 g average SAR in the fetus is 0.13 W/ kg at the maximum size when the input power of the antenna is 1.0 W.