Modelling of UWB antenna perturbed by human phantom in spherical harmonics space

Abstract

International audienceThe spherical harmonics expansion is an efficient tool to represent the antenna radiation pattern, especially in physical simulator, where the knowledge of full antenna data is fundamental and computationally intensive as well. Thus, the SH become imperative and represent compactly the antenna by reducing the data into a small number of coefficients. In Body Area Network (BAN) context, the goal is to go further than a compact storage of antenna data. In fact, we aim to study the effect of human phantom presence on the antenna in terms of spherical harmonics coefficients. The proposed paper will present a simple SH coefficients model allowing to predict the antenna behaviour disrupted by a human phantom, based on the knowledge of the SH coefficient of antenna in free space and antenna-phantom distance