Abstract
The phenomenon of microwave power absorption has recently become of increased scientific and public interest, particularly in the area of cellular communication. Electromagnetic power absorption in biological tissues is a well-known phenomenon. Its evaluation requires, in general, a solution of the 3D frequency-dependent wave equation in complex configurations, which may necessitate quite massive analytical and numerical efforts. Herein, we focus on a simplified 1D model corresponding to normal-incidence of plane-waves upon a lossy half-space. Our model establishes a tight estimate on the maximal (optimal) power absorption in realistic mobile phone - human head configurations. Furthermore, the absorption efficiency as well as the source impedance are obtained via an explicit closed-form expressions, leading to an explicit optimal power absorption (worst-case/best-case) criteria for highly lossy tissues
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