ANTENNA RADIATION PROPERTIES IN PRESENCE OF ANISOTROPIC PLASMAS,
Abstract
An extensive quantitative experimental investigation has been conducted on the influence of a magnetic field on the radiation from a horn antenna situated behind a layer or sheath of plasma. The magnetic field direction was along the principal direction of radiation of the antenna which is normal to the layer of plasma. The experimental results were compared to theory based on the reciprocity theorem. For an isotropic plasma and for the left-hand circularly polarized wave satisfactory agreement between theory and experiment was obtained. Propagation effects at off-normal incidence corresponding to the condition where the ordinary wave mode switches to the extra-ordinary wave mode as the electron density passes through the critical density, are shown to be of importance for the radiation patterns of the left-hand circularly polarized wave. For the right-hand circularly polarized wave mode radiation pattern significant departures in the measurements from theory occur in the region of the electron cyclotron frequency and below. For values of the electron cyclotron frequency greater than the wave frequency, satisfactory correspondence between theory and experiment is found. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1967
- Accession Number
- AD0665880
Entities
People
- B. W. Gibbs
- K. A. Graf
- M. P. Bachynski