Abstract
A simple but useful human head model for handset antenna designs is discussed at the frequency band of 900 MHz.First, the effect of the head model's shape on the radiation characteristics of a dipole antenna is investigated by using various homogeneous head models.Next, the effect of material constants of the tissue on the radiation characteristics is discussed by using a homogeneous head model.A qualitative and quantitative discussion reveals that the effect of the head model's shape on the antenna characteristics is larger than that of the heterogeneity of the model.In particular, radiation characteristics are found to be not a ected so much by material constants of the homogeneous head model.
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