Cell Phone Antenna To Simulate The Electromagnetic Radiation On The Human Brain

Along with rapid development of science and technology and huge improvement of the life level, the possession mass of handset have increased swiftly, which have became an indispensable tool for communication in modern society.Meanwhile, it has been a focus that whether the radiation of handset hurts human health.Although the radiation power of handset is little. the head is likely to locate in the strong electromagnetic radiation field when handset is operated with its antenna close to human head.The experiments indicate that the electromagnetic radiation may induce thermal and non-thermal effects in human tissues, consequently, form a possible damage to human body.The research on coupling of handset with human body is a complex topic involving extensive factors.Its main reasons are that the search refers to the problems of near field from the theory of electromagnetic field of view, and there have anomalistic boundary among human tissues that have different electrical and dispersive characteristic from biology of view.It means the research should use synthetically and crossly knowledge of theory of electromagnetic field, antenna theory, numerical solution of electromagnetic boundary and biomedicine.These research projects include two main contents:positive problem and contrary problem.The positive problem is what absorption characteristic the head to electromagnetic power in the radiation near field of handset has, namely, the problem about analyzing and calculating distributing specific absorption rate(SAR)and average specific absorption rate(SARav), and evaluating.whether the harm of handset radiation to human body exists.The contrary problem is what influence on the handset antenna the head in the radiation near field of handset can cause.The research result of the positive problem provides numerical foundation for the application of electromagnetic field to biomedical engineering and establishing a standard of non ionizing radiation protection.The research result of the contrary problem provides reference for exploiting new productions of handset and improving handset performance.This paper concludes the rationale and the gist of FDTD on the base of introducing the knowledge of bio-electromagnetics and bio-electromagnetic dosimetry.On the base of discussing the modeling method of human, this paper emphasizes describing the transform process of FDTD geometric and electromagnetic mesh from MRI anatomic images.Based on setting geometric and electromagnetic model of human head, electromagnetic dosimetry absorbed by the head in the radiation near field of handset is emulated and calculated.This paper analyses the effects of human body Oil handset antenna on the base of analyzing planar inverted—F antenna characteristics.Finally, the calculating results are given in numerical and graphic ways.