  The research works on the biological effects of electromagnetic (EM)
radiation have increased globally. Computer simulation models were developed to
assess exposure of square, rectangular, pyramidal, and cylindrical water
containers to microwave radiation at 300, 900, and 2,400 MHz. The development
of the models included determination of EM field distribution and the resulting
specific absorption rate (SAR) in the stored water. These models employed CST
STUDIO SUITE 2014 package to solve EM field equations by applying the
finite-difference time-domain (FDTD) method. The effect of frequency, packaging
shape, and polarization on SAR induced in water was determined. High electric
field and point SAR were obtained over the whole azimuth and elevation angles
range in the pyramidal container model. The highest values of SAR were induced
in water at the sharp edges of the four water container models. The order of
the effect on total SAR and maximum point SAR is cylindrical < square <
rectangular < pyramidal model at 300, 900, and 2,400 MHz for both vertical and
horizontal polarizations. It can be concluded that the variation in the
packaging shape of the containers, polarization, irradiation geometry, and
frequency. In addition, the sharp edges of the container models significantly
affect the calculation and distribution of electric and magnetic fields and SAR
values induced in the stored water, which in turn could cause variations in the
non-thermal effects of the electromagnetic fields in the stored water.
