Intermodulation Study: (Intermodulation Products - Satellite Ground Antennas)

Abstract

A description of tests, observations, problems and results of work performed to reduce the intermodulation products generated in the 5-horn feed of a 60-foot diameter parabolic antenna. The goal was to produce feed components that generated intermodulation products at levels below -140 dBm while subjected to 10 kW CW of total power in any combination of carriers. The receive band was 7.25 to 7.75 GHz; the transmit band was 7.9 to 8.4 GHZ. The study was conducted in three phases: The determination of intermodulation levels as a function of total power, proportional power between carrier, waveguide current densities, vacuum, and test configuration; Specific problems encountered in fabricating waveguide devices, specifically flanges, seams, materials, tuning methods, and the degeneration of these factors with time; An effort to obtain specific intermodulation-free components, particularly stable filters and flanges.

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Document Details

Document Type
Technical Report
Publication Date
Aug 24, 1973
Accession Number
AD0785711

Entities

People

  • A. A. Gradisar
  • J. R. Bordenave
  • J. V. Rootsey

Organizations

  • CGI Group

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Gaps
  • Amplifiers
  • Assembly
  • Bandpass Filters
  • Bandstop Filters
  • Construction
  • Creep
  • Fabrication
  • Filtration
  • Geometry
  • Manufacturing
  • Materials
  • Mechanical Working
  • Surface Roughness
  • Tensile Strength
  • Test Facilities
  • Vacuum Chambers

Readers

  • Electronics Engineering
  • Phased Array Antenna Design.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster