Review of the Hidden Rays of Diffraction
- Review of the Hidden Rays of Diffraction
- diffraction; Edge; wedge; Physical Optics; hidden rays; Ray-Tracing
- Issue Date
- Journal of Electromagnetic Engineering and Science
- VOL 15, NO 1, 1-5
- A high-frequency analysis technique, called the hidden rays of diffraction (HRD), is reviewed in this paper. The physical optics and the rigorous diffraction coefficients of a perfectly conducting wedge illuminated by a plane wave are compared. The physical existence of hidden rays on the shadow boundary is explained in view of the geometric theory of diffraction (GTD). In particular, a systematic tracing of hidden rays and its visualization are precisely described by introducing the concept of the supplementary boundary. The physical meaning of the null-field condition in the complementary region is also explained.
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