ADMITTANCE OF ANNULAR SLOT ANTENNAS RADIATING INTO A PLASMA LAYER

Abstract

The slot admittance is calculated for a slot radiating into a waveguide of radius 5 to 10 wavelengths. The radius of the wide waveguide is selected so that the slot admittance is equal to the admittance for a semi- infinite half space in absence of plasma. This slot admittance is an approximation to the admittance of an inhomogeneous half space in presence of a plasma layer. The calculated slot susceptance is shown to be nearly constant for various thicknesses of the plasma layer, while the slot conductance and radiation conductances are decreased by increasing plasma thickness. This approximate calculation appears to be particularly good for thin layers of electrically contrasting plasma. The calculations indicate an admittance similar to that of earlier cl1ulatin1 for a 1ctangular slot radiating into a wide rectangular waveguide.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1963
Accession Number
AD0425302

Entities

People

  • Janis Galejs

Organizations

  • Sylvania Electric Products

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Antennas
  • Computer Programming
  • Contracts
  • Current Density
  • Department Of Defense
  • Diameters
  • Electron Density
  • Geometry
  • Government Procurement
  • Governments
  • Magnetic Fields
  • Massachusetts
  • Radiation
  • Radiation Patterns
  • Slot Antennas
  • Thickness

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Materials Science and Engineering.
  • Phased Array Antenna Design.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster