Effect of Downlink Phased Array Patterns on System Availability Contour Predictions.

Abstract

The relative variation in the pattern function for a 32 element, multi-beam EHF satellite phased array has been incorporated into the equation for downlink margin. The corrected margin is used to determine allowable rain attenuation (dB) and predict link availability based on Crane's 8 region world wide rain rate distribution and climate model. Link availability contours are computed for the cases of a 31 beam and 37 beam phased array. Four equi-spaced geostationary satellites are required for either configuration in order to provide 0.99 (or greater) link availability to all points within the 10 deg. elevation angle field of view for the nominal value of downlink margin and a frequency of 20.7 GHz. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Apr 10, 1980
Accession Number
ADA088664

Entities

People

  • L. M. Schwab
  • Y-l. C. Lo

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Antenna Configurations
  • Arrays
  • Artificial Satellites
  • Attenuation
  • Availability
  • Cartesian Coordinates
  • Climate Change
  • Data Rate
  • Downlinks
  • Frequency
  • Gain
  • Geosynchronous Orbits
  • Geosynchronous Satellites
  • Grids
  • Losses
  • Phased Arrays
  • Satellite Communications

Readers

  • Approximation Theory.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Tactical Satellite Communications Systems Engineering.

Technology Areas

  • Space