Accession Number : ADA130107

Title :   HF Satellite Antenna Analysis,


Personal Author(s) : Weijers,Bertus

PDF Url : ADA130107

Report Date : Oct 1982

Pagination or Media Count : 40

Abstract : Results of a satellite antenna analysis using the Antenna Modelling Program (AMP) are presented. A satellite structure with an HF dipole antenna attached was simulated using a wire grid model. The HF dipole antenna is part of a receiving system in earth orbit used for an ionospheric ducted mode experiment. The antenna gain patterns for several possible satellite antenna configurations are presented and analyzed to determine acceptable configurations for the ducted mode experiment. Examined were the influence of dipole element length, orientation of the elements, and their positioning with respect to the satellite structure for frequencies from 6 to 30 MHz. Also, the antenna impedances were calculated to determine the possible losses when the antenna is terminated in a resistive impedance load. The influence of the ionospheric plasma on the mismatch losses was also estimated. (Author)

Descriptors :   *Satellite antennas, *Antenna radiation patterns, *Antenna configurations, *Ionospheric propagation, *Dipole antennas, Plasmas(Physics), Signal to noise ratio, High frequency, Grids, Length, Ducts, Earth orbits, Models, Wire, Dipoles, Ionosphere, Impedance, Electric wire, Gain

Subject Categories : Electrical and Electronic Equipment
      Plasma Physics and Magnetohydrodynamics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE