SLOT ANTENNA IMPEDANCE FOR PLASMA LAYERS,
Abstract
The rectangular cavity or waveguide backed slot is covered by a plasma layer of finite thickness. The longitudinal variation of the voltage across the slot is obtained from the variational sol4tion of an integral equation. The solution for plasma layer of finite thickness is obtained from the free space Green's function by the method of images. The fields outside the slot depend on the surface integral of the fields over the slot plane and over the surface of the plasma layer. If the thickness of the plasma layer is large compared with the wavelength, the fields on the surface of the plasma may be related to the voltage distribution along the slot by plane wave reflection coefficients. This leads to an integral equation that is reduced to a form suitable for machine computations. These calculations show the slot admittance to remain almost constant for plasma layers of various thickness h. The slot conductance tends to increase for h/lambda less than 0.5. The presence of a plasma layer affects the voltage distribution along the slot for a center excited slot differs only slightly from the principal mode field distribution in the guide. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1963
- Accession Number
- AD0425300
Entities
People
- Janis Galejs
Organizations
- Sylvania Electric Products