Analysis of the antenna in proximity of human body base on the dual-grid FDTD method

Dual-grid finite-difference time-domain(DG-FDTD) method is suitable for electromagnetic simulation of multi-scale problems, this paper validate the accuracy of DG-FDTD through a simple simulation. An accurate human model was built based on Zubal human digital phantom, which was used to analyze the electrical performance of the antenna on human body. Simulation results show that human body had a significant influence on the antenna due to the high relative permittivity of the body, the closer from human body, the greater impact on antenna. Because of the shielding of the human body, the antenna radiation power on the backside of human body is 5dB smaller than which in front of human body.