Accession Number : AD0250931

Title :   A NOTE ON WAVEGUIDE IMAGE TECHNIQUES

Corporate Author : CASE INST OF TECH CLEVELAND OH

Personal Author(s) : COLLIN, R.E.

Report Date : 30 NOV 1960

Pagination or Media Count : 1

Abstract : Floquet's theorem and the reflection symmetry properties of Maxwell's equations are used to establish the relationship between scattering by two dimensional periodic structures in free space and equivalent waveguide problems. For structures such as strip gratings, having periodicity in one direction only it is shown that the free space problem is equivalent to the sum of two waveguide problems and vice-versa. For structures with periodicity along two axis it is shown that four waveguide problems must be solved in order to determine the complete solution of the free space problem. Only when more than one basic cell of the periodic structure is contained within the waveguide walls will a single waveguide problem be equivalent to the free space problem as far as dominant mode fields are concerned. (Author)

Descriptors :   *ELECTROMAGNETIC WAVE REFLECTIONS, *ELECTROMAGNETIC RADIATION, *WAVE PROPAGATION, *WAVEGUIDES, MATHEMATICAL ANALYSIS, PROPAGATION, REFLECTION, SCATTERING.

Distribution Statement : APPROVED FOR PUBLIC RELEASE