Accession Number : AD0600116

Title :   STUDY AND INVESTIGATION OF A UHF-VHF ANTENNA.

Descriptive Note : Bimonthly rept. no. 6, 2 Nov 63-2 Jan 64,

Corporate Author : MICHIGAN UNIV ANN ARBOR COOLEY ELECTRONICS LAB

Personal Author(s) : Herman,J. E. ; Rhee,S. B.

Report Date : MAR 1964

Pagination or Media Count : 59

Abstract : Design criteria for optimal use of ferrites in rectangular slot radiators were established. Analysis firmly indicates that similar optimization can be achieved for annular slot antennas. Further experiments with log conical spirals were performed which resulted in extension of frequency range. A log conical antenna taking full advantage of the frequency range of the available ferrite powder was made. The thickness of ferrite surrounding log conical antenna elements appears to be a negligible factor. An analytical study of the equiangular spiral which can be adapted to the introduction of layers of ferrite was completed. Computer results for specific cases are not yet available. Preliminary test data on a log zig-zag antenna using powdered ferrite are presented. (Author)

Descriptors :   (*SLOT ANTENNAS, OPTIMIZATION), (*SPIRAL ANTENNAS, OPTIMIZATION), (*FERRITES, ANTENNAS), ANTENNAS, ULTRAHIGH FREQUENCY, VERY HIGH FREQUENCY, FERROMAGNETIC MATERIALS, POWDERS, ANTENNA RADIATION PATTERNS, BANDWIDTH

Distribution Statement : APPROVED FOR PUBLIC RELEASE