The Numerical Simulation Of Electric Field Distribution In Human Body Exposed To Electromagnetic Plane Waves Between0.9GHz And10GHz

In this thesis, basing on the establishment of a resolution of2mm male and female electromagnetic model, we use the FDTD numerical simulation method to calculate the electric strength value of the human body between0.9GHz and10GHz. Electromagnetic plane waves incident from front, side and top surface of the body. We obtain the value of electric field strength in the human body and brain, eye, testis, uterus and other fifteen organs. The value of incident electromagnetic plane wave is1v/m. We further calculate the maximum electric field strength values and the average electric field strength value of each organ and the whole body average electric field strength values. From the point of different organs to discuss the rationality of the safety standards of the international non-ionizing Association, to discuss the rationality of characterizing the biological effects using electromagnetic exposure in vivo. With the provisions of the international non-ionizing Association (ICNIRP) occupational exposure safety limits, we calculate the maximum SAR value and the average SAR value of the testicular tissue as well as the whole body averaged SAR value. These results provide a more sophisticated numerical simulation data for the safety standards of electromagnetic radiation.The numerical simulation results show that (1) For the male model in the band0.9GHz-10GHz, as the frequency increases, the maximum electric field strength values and the average electric field strength values of each organ and the whole body average electric field strength values are lower; At the same frequency, all the values which include the maximum electric field strength values and the average electric strength values of each organ when positive exposed are higher than that of side exposed and that of top exposed; The maximum electric field strength values and the average electric strength values of the brain, eye and testis are higher than other organs at three frequencies, With three direction of incidence; the maximum electric field strength value and the average electric field strength values of the kidney are very low; The whole body average electric field strength values when top exposed are lower than that of side exposed and that of positive exposed.(2) Electric field strength distributions in vivo male and female models are basically the same when the incident conditions are the same. Numerically, the difference of maximum electric field strength values of the brain between the male and female model in9.33GHz when side exposed is up to66%. Numerical difference in the other cases is within20%.The average SAR value and the maximum SAR value of the testicular tissue differ when frequency or incident direction differs. Maximum SAR value of testicular tissue when positive exposed are higher than that of side exposed and that of top exposed. When the incident direction is positive, the maximum SAR values of testicular tissues are10.523W/kg、8.228W/1、17.314W/kg which are higher than the international non-ionizing Association (ICNIRP) on occupational exposure limits for10W/Kg, while the whole body average SAR values to meet the provisions of the international non-ionizing association (ICNIRP)0.4W/Kg. Average SAR value of the testicular tissue is more than20%of the safety standards. The previous results show that the testis is a heat-sensitive organ. Electromagnetic irradiation in testis temperature rise is a noteworthy point of the study of electromagnetic waves on male reproductive function.The above analysis shows, the electromagnetic calorimeter of the site of the biological effects in vivo could more accurately characterize the biological effects. Local specific absorption rate (SARlg) is much more refined than the organization average specific absorption rate (SARu) and the body average specific absorption rate (SARwb) to descript the biological effect in vivo.