Impedance Measurements on a VLF Multi-Turn Loop Antenna in a Space Plasma Simulation Chamber.

Abstract

The Space Sciences Laboratory of The Aerospace Corporation is presently defining an experiment to test a loop antenna configuration for a VLF transmitter in the ionosphere. The primary objectives of the experiment are to validate existing models for radiation by a loop antenna and to study the performance of the antenna in the ionospheric plasma. A one-third scale model of the antenna has been constructed. Impedance measurements have been made on the model in a 5-m diameter space plasma simulation chamber at NASA Lewis Research Center. The measurements confirm that the reactance of the antenna in an ionospheric plasma is essentially identical to its free space self inductance. The effective series resistance of the circuit increases with frequency. The losses are attributed to power transferred to plasma turbulence. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 1984
Accession Number
ADA145104

Entities

People

  • B. C. Edgar
  • Harry C. Koons
  • M. H. Dazey

Organizations

  • The Aerospace Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Antenna Configurations
  • Diameters
  • Impedance
  • Loop Antennas
  • Magnetic Fields
  • Measurement
  • Measuring Instruments
  • Models
  • Radiation
  • Radiation Patterns
  • Resonant Frequency
  • Scale Models
  • Security
  • Simulations
  • Space Sciences
  • Space Systems

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Phased Array Antenna Design.
  • Space/Atmospheric Physics.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster