An Efficient Hybrid GTD-Modal Analysis of the Scattering by an Open-Ended Dielectric Filled Cavity in a Ground Plane
Abstract
The problem of electromagnetic scattering by an open ended dielectric filled 2-D rectangular cavity in a ground plane is analyzed in an efficient manner via a hybrid combination of ray and modal techniques. In this analysis, the generalized scattering matrices for the junctions pertaining to the discontinuities at the open front end and the back termination are found in a conceptually simple fashion via the geometrical theory of diffraction (GTD) and its modifications, rather than via the conventional and more cumbersome modal matching procedure. The relatively simple expressions obtained for the elements of the scattering matrices essentially describe the complex modal amplitudes of the waves reflected and transmitted by the junctions. The multiple interactions of the modal waves between the junctions are easily accounted for via the generalized scattering matrix technique. The solution explicitly contains the contributions to the scattered field which are due to the diffraction from the open end and the interior cavity effects. These concepts are illustrated only for the two-dimensional case here.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1987
- Accession Number
- ADA245553
Entities
People
- C. W. Chuang
- M. C. Liang
- P. H. Pathak
Organizations
- Ohio State University