Abstract
The paper presents a proposal of a method used to calculate path loss over an irregular terrain in an open, rural environment. The proposed method is based on the analysis of three basic types of wave: direct, reflected and diffracted. The assumptions of Geometrical Optics (GO), which is used in reflection analysis, as well as diffraction phenomena, have been described. The diffraction phenomena is analysed according to the Uniform Theory of Diffraction (UTD) and the reflection is calculated according to the Ray Tracing (RT) method. In addition, the irregular surface model used for the simulation and analysis of results for various cases have been presented. All results were compared to propagation loss calculated by the well-known two-ray model. DOI: http://dx.doi.org/10.5755/j01.eee.20.2.4300
Highlights
In an open, rural environment the two-ray model is very often used for the calculation of path loss of radiowave propagation
The simulation results, based on a combination of Geometrical Optics (GO) and Uniform Theory of Diffraction (UTD), are in very good agreement with measurements and with other calculation methods (e.g. Physical Optics combined with Physical Theory of Diffraction), which are very often used in an outdoor [4]–[7], as well as an indoor environment [8]–[10]
This paper presents the proposal of a new model, which is used for e-m wave path loss evaluation above an irregular surface
Summary
Rural environment the two-ray model is very often used for the calculation of path loss of radiowave propagation. This model, assumes that the reflecting surface is perfectly flat. The presented model is based on the Ray Tracing (RT) method, which is widely used for the calculation of propagation loss. It is very often combined with UTD, especially in an urban environment or with other methods e.g. FEM (Finite Element Methods) indoors [3]. Propagation over an Manuscript received May 6, 2013; accepted November 22, 2013
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