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Several wireless communication technologies operating in the millimeter wave (MMW) band are already in practical use. Therefore, a safety analysis of exposure to MMW frequency is required. In this study, we measured dielectric properties of epidermis and dermis at up to 110 GHz using enucleated porcine skin, because of measurement data scarcity for biological tissues in the MMW band. The Measurement...
Many millimeter-wave exposure experiments using animals have been performed in order to investigate the possible health effects in the past but a few of them could provide dosimetry analysis. In this paper, we apply the Poggio-Miller-Chang-Harrington-Wu-Tsai method of moments to investigate differences in the absorbed power distribution due to three different exposure conditions; a rabbit head phantom...
The guard trace is effective for suppressing common-mode generation caused by placing a signal trace close to the return edge on a printed circuit board. Our previous studies on the guard trace focused only on a design methodology for reducing common-mode radiation, but the placing guard trace close to the signal line increases crosstalk to deteriorate signal integrity. A guard trace with a periodic...
In this paper, we propose efficient reflection and transmission coefficients from two-layered dielectric slab for realizing accurate ray-launching propagation analysis, by approximately including multiple reflections effect inside the dielectric slab. In order to precisely execute the ray-launching analysis through the two-layered slab, which is a simplified model of insulating glass window utilized...
In this paper, we apply the dynamic differential evolution (DDE) algorithm to solve the inverse scattering problem for which a two-dimensional (2-D) dielectric cylinder is buried in a dielectric slab medium. Finite difference time domain method (FDTD) is used to solve the scattering electromagnetic wave of a dielectric cylinder. The inverse problem is resolved by an optimization approach and the global...
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