Abstract
A high-order dielectric conformal technique based on the modified finite difference time domain (FDTD) method has been proposed in this paper to predict the specific absorption rate (SAR) distribution of a human body model illuminated by some typical radar sources on ship platforms. The conformal technique introduces an effective dielectric constant and a new conductivity derived by linear average of different dielectric regions in nine spatial discrete cells to modify the update equations of FDTD method. Furthermore, the effects of incident radar signals with different incident angles and polarizations on the SAR distribution are characterized in detail and the simulation results also show that our method has good accuracy and computing efficiency compared with the traditional methods.
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