SCATTERING RESONANCES ON A FAST-WAVE STRUCTURE,
Abstract
The scattering resonances, or generalized Wood's anomalies, that are exhibited on a fast-wave structure are investigated. The fast-wave struc ture analyzed here in detail consists of a par allel-plate waveguide perturbed by a series of periodic, parallel slits in the top plate. In the range a/gamma < 1/2, the plane wave scatter ing problem is considered for both E and H mode polarizations, and the anomalies are found to manifest themselves as a rapid variation in the phase of the reflection coefficient. When a/gamma < 1/2, there are no higher order diffracted waves, and the magnitude of the reflection coefficient is therefore fixed at unity. The relative peri odicity is next extended to the range 1/2 < a/gamma < 1, and the scattering problem consid ered for E mode polarization. The periodicity is now such that both the reflected wave and the first higher order diffracted wave propagate transversely. Under such circumstances, it is convenient to use a scattering description for the fields, and the anomalies may then be ob served as rapid variations in both magnitude and phase of the scattering coefficients. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1963
- Accession Number
- AD0416437
Entities
People
- Robert C.m. Li
Organizations
- New York University Tandon School of Engineering