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  • 1
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    Design method for minimizing RF voltage breakdown (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Research study was conducted and results were published. Using principles of similarity and minimum of experimental data, a number of universal curves have been constructed covering wide range of experimental parameters. Gases other than air, such as argon and carbon dioxide, also are included in study.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13408
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Effects of turbulence in the atmosphere of Venus on Pioneer Venus radio, phase 2 (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Two problems related to the effects of turbulence in the atmosphere of Venus on the Pioneer entry probe radio link were studied. In the first problem, the cross correlation between the log amplitude and phase fluctuations of the Pioneer Venus communications link is examined. Data show that for fluctuation frequencies above approximately 1 Hz there is little or no correlation. For frequencies below this region the correlation is weak and the square root of the coherence has a peak value close to 0.65. The second problem consists of interferring turbulence characteristics of the Venus atmosphere from the Mariner 5 phase fluctuations. Data show that with the data processing techniques developed and currently available, the phase error due to oscillator drift, assumed trajectory delay, and spline curve fit exceed the turbulence induced fluctuations. Results show that it is not possible to interfere with the turbulence characteristics from Mariner 5 phase fluctuations.
    Keywords: COMMUNICATIONS
    Type: NASA-CR-139657 , JPL-TM-33-702
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Low loss dichroic plate (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A low loss dichroic plate is disclosed for passing radiation within a particular frequency band and reflecting radiation outside of that frequency band. The dichroic plate is comprised of a configuration of dipole elements defined by slots formed in a conductive plate. The slots are dimensioned so as to pass radiation of a selected frequency and are shaped so as to minimize the relationship between that frequency and the tilt angle of the plate relative to the direction of radiation. The slots are arranged so as to minimize signal power loss due to cross polarization effects.
    Keywords: STRUCTURAL MECHANICS
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Low-loss, circularly-polarized dichroic plate (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Dichroic plate has orthogonally-disposed, loaded dipole apertures with their orientations arranged so as to cancel cross-coupling effects which would otherwise result in power loss to circularly polarized signal.
    Keywords: ELECTRONIC COMPONENTS AND CIRCUITS
    Type: NPO-13171
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Method for remotely sensing turbulence of planetary atmospheres (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Based on variances of log-amplitude and phase fluctuations of radio occultation data received from orbital and fly-by missions, structure constant for Venusian planetary atmosphere has been estimated with high-confidence factor. Analysis indicates that effects of inhomogeneity, finite size, and superrefractivity of atmospheric turbulence cannot be ignored.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-13154
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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