Accession Number : AD0852185

Title :   Plasma Antenna Radiation Characteristics.

Descriptive Note : Final technical rept.,

Corporate Author : MOORE SCHOOL OF ELECTRICAL ENGINEERING PHILADELPHIA PA

Personal Author(s) : Kritikos, Haralambos N. ; Lombardini, Pietro P. ; Allen, Jonathan ; Lang, Kuo C. ; Yen, Percy

Report Date : APR 1969

Pagination or Media Count : 65

Abstract : The report presents an analysis of the physical and electrical characteristics of a plasma jet for the purpose of using the plasma column as an antenna. The report presents a first order approximation synthesis of an argon arc jet in air, at atmospheric pressure. The jet is in the shape of a cylindrical column of high temperature laminar flow for a considerable length (approximately one meter) and terminates abruptly because of turbulent mixing with air. Along the extension of the laminar flow, the sole important loss mechanism is assumed to be radiation. The equation of energy balance allows computation of the axial temperature distribution, and, therefore, the axial conductivity distribution. An approximate solution for the current distribution on a cylindrical antenna with axially varying conductivity is obtained. Coupling the conductivity distribution obtained into the solution for the current distribution, it is shown that the argon arc jet can provide a highly capable UHF antenna. For antennas in the HF range it is suggested that combustion jets be utilized. The proper conductivities may be obtained by seeding with low ionization material. (Author)

Descriptors :   *PLASMA JETS), (*DIPOLE ANTENNAS, ARGON, RADIO TRANSMISSION, ELECTRICAL CONDUCTIVITY, ULTRAHIGH FREQUENCY, NUMERICAL ANALYSIS, LAMINAR FLOW, ADDITIVES.

Subject Categories : Electrical and Electronic Equipment
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE