Journal
IEEE ANTENNAS AND PROPAGATION MAGAZINE
Volume 50, Issue 3, Pages 11-20Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MAP.2008.4563560
Keywords
physical optics; physical theory of diffraction; Fresnel diffraction; shadow radiation; forward scattering; acoustic scattering; electromagnetic scattering
Ask authors/readers for more resources
The Physical Optics approximation is widely used in analysis of antennas and scattering problems for electromagnetic and acoustic waves. The present paper investigates the nature of this classical approximation. It is shown that the scattered field in this approximation can be separated into two parts: the reflected field, containing all reflected rays and beams, and the shadow radiation, responsible for the Fresnel diffraction and the forward scattering. This observation elucidates the physics behind the fundamental diffraction law related to the total power scattered by large reflecting objects. It also clarifies the diffraction limit for reduction of scattering by absorbing materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available