Electromagnetic Scattering from Rough Surfaces in Three Dimensions at Low Grazing Angles
Abstract
Electromagnetic wave scattering at rough surfaces in 3D at realistic geometries and frequencies remains extremely challenging, both theoretically and computationally. In applications such as microwave propagation over sea surfaces, a key task is to characterize targets such as ships or near surface objects in the presence of surface-scattered EM fields. The computational difficulty increases rapidly with wave frequency and domain size, so that accurate modeling quickly becomes intractable. Low-grazing angle scattering which is inherent in near-surface propagation suffers from particular difficulties resulting in high multiple scattering for which simplified models breakdown. The Lef-Right splitting method (L-R), introduced originally for acoustic waves, will be adapted to the above electromagnetic case. L-R splitting uses an operator series expansion, in which successive terms model increasing orders of multiple scattering. It has many of the benefits of the parabolic equation while retaining much greater accuracy and region of validity.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 30, 2019
- Source ID
- N629091912128
Entities
People
- Mark Spivack
Organizations
- Office of Naval Research
- United States Navy
- University of Cambridge