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Computationally-effective worst-case model of coupling between on-board antennas that takes into account diffraction by conducting hull

A worst-case computationally-effective model for analysis of coupling between on-board antennas mounted on the conducting hull of a system (aircraft, ship, car, etc.) is proposed. Consideration of electromagnetic wave diffraction by the arbitrary-shaped hull is based on combining of the model for calculation of shading by convex surfaces of rotation bodies (cylinder, cone) and the wedge diffraction model obtained in the framework of the Uniform Theory of Diffraction (UTD). The proposed model of antenna coupling is validated by comparison with results of experiments and numerical simulation (by FDTD and GTD-PO methods) in a wide range of parameter values: cases of monopole and dipole antenna mounting in various points of the aircraft hull with several mutual orientations are considered, the frequency is varied from 50 MHz to 7 GHz, the ratio of wavelength to diffraction-path length is varied from 0.001 to 1.