Simple Empirical Model for Long Distance Through-Foliage Propagation

A simple empirical model for long distance through-foliage propagation is presented. It comprises two parallel propagation mechanisms: direct transmission through a line of trees modelled by a simple linear transmission line; and along the free-space dominated forest top, modelled by simplified multiple-edge diffraction. The model is matched to recently published experiments by Hejselbaek et al over a long distance (2500m), demonstrating a fit that is not possible using other physics-based modelling.