Method of predicting scattering of an electromagnetic wave at a surface with location-dependent scattering properties
AssigneeHer Majesty the Queen in right of Canada as represented by the Minster of Industry, Through the Communications Research Centre Canada
InventorYvo De Jong
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Abstract
A method of predicting scattering of an electromagnetic (EM) wave incident on a surface with location-dependent scattering properties such as an engineered electromagnetic surface is based on generalized Snell's Law and includes offsetting a direction of scattering by a vector determined based on the properties of the surface at a particular point of incidence. The method solves the problem of “exact path calculation,” by exhaustive search of possible locations for points of incidence, followed by a fine approach, both steps using the data describing the local properties of the surface.
Claims20
A method of predicting one or more directions of scattering of an electromagnetic wave incident on a surface with location-dependent scattering properties,
- the method comprising:
- (A) providing surface data related to the location-dependent scattering properties at the surface;
- (B) providing a candidate point of incidence on the surface;
- (C) for the electromagnetic wave incident on the surface, providing a direction of incidence;
- (D) determining a phase differential at the candidate point, based on the surface data at the candidate point;
- (E) determining a projection on the surface of a direction of scattering from the candidate point, comprising offsetting a projection on the surface of the direction of incidence by the phase differential;
- and,
- (F) determining a normal component of a direction of scattering of the electromagnetic wave, using the projection on the surface of the direction of scattering from the candidate point.
Dependencies are inferred from the claim text.