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Calculation of antenna near field reactions on low conducting materials using the finite element method

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3 Author(s)
W. Renhart ; Inst. for Fundamentals & Theor. in Electr. Eng., Graz Univ. of Technol., Austria ; W. Rucker ; O. Biro

On account of the progress in using mobile telecommunications systems in the high frequency range, the human body is increasingly exposed to electromagnetic fields. Therefore, the numerical simulation of the power absorbed in human tissue becomes extremely important in order to avoid thermal destruction. A typical example is the strong interaction between the near field of a receiving antenna of a hand held transceiver and the sensitive organs on the head, like the eyes. A finite element formulation is given for calculating 3D electromagnetic scattering problems. The influence of a dipole excited field on low conducting materials situated very close to the antenna is discussed. The backscattering from the conducting object to the antenna can be treated as well. Along the far boundaries of the computational domain, absorbing boundary conditions of second order have been prescribed in order to avoid non-physical reflections. The formulation described is assessed by applying it to a special problem and the solution obtained is compared with a boundary element calculation

Published in:

IEEE Transactions on Magnetics  (Volume:32 ,  Issue: 3 )