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Tolerance Theory Of Periodic Surfaces, James A. Godsey
Tolerance Theory Of Periodic Surfaces, James A. Godsey
Theses and Dissertations
Two formulations for the far field statistical average power pattern of a strip grating with errors in strip and slit width are presented. The first formulation utilizes the Born approximation in which the unknown aperture fields are replaced by the incident fields. The second formulation utilizes an approximation which satisfies the edge condition. Approximations for the scattered fields are first derived using PEC surface equivalence for a TEz polarized plane wave incident upon a strip grating consisting of an infinite PEC screen cut by a number of infinitely long slits. Babinet's principle is then used to obtain approximations for the …
Scattering From Finite By Infinite Periodic Arrays With Arbitrary Piecewise-Linear Slot Elements, Paul R. Barre
Scattering From Finite By Infinite Periodic Arrays With Arbitrary Piecewise-Linear Slot Elements, Paul R. Barre
Theses and Dissertations
A numerical model for analyzing electromagnetic scattering from a planar Frequency Selective Surface (FSS) is developed. The model can represent an FSS with multiple arrays of arbitrary piecewise linear scatterers in a stratified dielectric medium. The FSS's arrays are finite by infinite, accounting for edge effects, where a periodic array element is formed from the piecewise linear connection of thin slots in a groundplane. The stratified dielectric medium is defined as an arbitrary stack of lossless dielectric slabs that sandwich the user defined arrays, simulating an FSS. The Surface Equivalence theorem is used to construct an equivalent problem based on …