Title :
An incremental theory of diffraction: electromagnetic formulation
Author :
Tiberio, R. ; Maci, S. ; Toccafondi, A.
Author_Institution :
Coll. of Eng., Siena Univ., Italy
fDate :
1/1/1995 12:00:00 AM
Abstract :
A scalar formulation of the incremental theory of diffraction (ITD) has been introduced by Tiberio and Maci (see ibid., vol.42, no.5, 1994), which provides a self-consistent, high-frequency description of a wide class of scattering phenomena, within a unified framework. In this paper, this method is extended to electromagnetic problems. The total field is represented as the sum of a generalized geometrical optics field plus incremental diffracted field contributions. Explicit dyadic expressions of incremental diffraction coefficients are derived for wedge-shaped configurations. The formulation of the field is uniformly valid at any incidence and observation aspects, including caustics and shadow boundaries of the corresponding ray field description. Numerical results are presented and compared with those obtained from different techniques
Keywords :
electromagnetic field theory; electromagnetic wave diffraction; electromagnetic wave scattering; geometrical optics; caustics; dyadic expressions; electromagnetic formulation; electromagnetic problems; generalized geometrical optics field; high-frequency description; incremental diffracted field; incremental diffraction coefficients; incremental theory of diffraction; ray field description; scalar formulation; scattering phenomena; shadow boundaries; total field; wedge-shaped configurations; Data mining; Electromagnetic diffraction; Electromagnetic scattering; Fourier transforms; Geometrical optics; Optical scattering; Optical surface waves; Physical optics; Physical theory of diffraction;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
