Analytical Model for Calculating Gain Pattern of Antennas Implanted in Large Host Bodies

TL;DR

This paper introduces a fast analytical method to estimate the gain pattern of implanted antennas within large host bodies, accounting for the body's effects using spherical wave analysis and layered media Green's functions.

Contribution

It provides a novel closed-form analytical model for accurately predicting the gain pattern of implanted antennas in large bodies, validated against simulations and measurements.

Findings

The model accurately predicts antenna gain patterns in layered media.

Validation shows good agreement with full wave simulations.

The method is computationally efficient for practical use.

Abstract

This paper presents a method for the fast and accurate estimation of the gain pattern and maximum gain of an implanted antenna including the effect of the host body, under the assumption that the latter is electrically large. The estimation procedure is based on the radiation of an elementary dipole source placed in a planar body model. The derivation of closed-form expressions is based on spherical wave analysis and the Green's functions for layered media. The validity of this approximation for practical cases is shown on different implanted antennas, where the results are compared to full wave simulations and measurements.