ANTENNA WITH AN ANISOTROPIC FERRITE SHEATH INSIDE A PARALLEL-PLATE WAVEGUIDE. THEORETICAL AND EXPERIMENTAL STUDIES.
Abstract
Closed form expressions for the current distribution and impedance of an antenna with a magnetized ferrite sheath inside a parallel-plate wave-guide have been obtained by a modal expansion technique. Numerical results have been obtained with an IBM 7090 computer for applied dc magnetic fields below resonance. Particular emphasis has been paid to studying the following aspects of the problem: (1) the effect of the birefringent properties of the magnetized ferrite sheath on the current and charge distribution of the antenna, (2) the behavior of the antenna at waveguide mode cutoff and at ferromagnetic resonance, (3) the effect of the feed-point singularity on antenna characteristics. In order to verify some of the theoretical predictions, experiments have been made at 1000 megacycles with an Indiana General R-6 Mg-Mn-Al ferrite sample. The experimental results agree qualitatively with theory. A description of the apparatus is included in this report. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1965
- Accession Number
- AD0616912
Entities
People
- B. Ramo Rao
Organizations
- Harvard University