SLOT ADMITTANCE FOR COMPRESSIBLE PLASMA LAYERS.
Abstract
The admittance of a waveguide is calculated for radiation into a general two layer compressible plasma which is further specialized to represent a plasma sheath and also an ion sheath in the presence of a plasma halfspace. The antenna admittance is related by integrals to the electric fields in the waveguide aperture, which are assumed to be a sum of the principal waveguide mode and of surface wave fields which are supported in this plasma geometry. The compressibility of plasma has the largest effect on the slot admittance when the slot width is equal to an odd number of half wavelengths of surface waves, but significant changes occur only if the relative dielectric constant of the plasma is less than 0.2, and the ratio of the free space velocity of electromagnetic waves to the acoustic velocity is less than 300. Plasma losses and the presence of an ion sheath tend to lessen the compressibility effects. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1965
- Accession Number
- AD0623407
Entities
People
- Janis Galejs
Organizations
- Sylvania Electric Products