Closed-form propagation model combining one or more propagation constant segments

A new model for path loss in radio systems is proposed, which combines the individual segment approach based on varying propagation constants into a single closed form expression. Before this work, the propagation models used examined each propagation segment individually. This closed form expression is more useful than prior models in performing near-far system analyses. This new model is based on concepts drawn from frequency response analysis used in the circuits and control communities. After showing that the general form of a frequency response fits the data shape of a path loss propagation study, the mathematics are refined to effect a close match with measured data. The applicability of this model to signal strengths that increases with distance, such as emerging from a shadow, is demonstrated