Diffraction by a rectangular building: comparison of three field-strength prediction techniques

A comparison is made between three methods to calculate the electromagnetic field diffracted by a perfectly conducting block-shaped obstacle. The models, that are first briefly described, include a ray-based model (uniform theory of diffraction) and two wave-based models (Fresnel surface integral and parabolic equation method). A test case is analysed with all methods resulting in good agreement between the predicted results for both linear orthogonal polarisations.