Finite Difference Time Domain Method To Electromagnetic Radiation In Mobile Communications Applications

In the past decades, the digital cellular telecommunication has rapidly been populized, at the same time it is widely debated whether the electromagnetic wave emitted by the electronic equipment will hurt the human抯 health. There is an urgent requirement to have a impartial and actual evaluation of the dosage of the electromagnetic radiation. At the other hand, the FDTD-Method has the excellent performance when it is applied to predict the near-filed distribution with the complicated boundary. At this sense, the author tries to examine the SAR distribution in the human body with the method of FDTD.In this paper the author has briefly introduced the basic theory of FDTD-Method at the beginning. Considering the importance of the antenna in the electronic system, the FDTD抯 application in antenna technology is discussed, too. To emphasize the biological effects due to EM-exposure, the concept of SAR and the national and international exposure standards for EM-exposure are both introduced. Moreover the SAR distribution of the exposed objects is implied with numerical results.The significance of the research of the EM-exposure dosage caused by the mobile telecommunication is to appraise all-sided the information society so that it is a green and friendly one for humankind.