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A method for producing a shaped contour radiation pattern using a single shaped reflector and a single feed
Eliminating the corporate feed network in shaped contour beam antennas will reduce the expense, weight, and RF loss of the antenna system. One way of producing a shaped contour beam without using aExpand
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Rain Fade Compensation Alternatives for Ka Band Communication Satellites
Future satellite communications systems operating in Ka-band frequency band are subject to degradation produced by the troposphere which is much more severe than those found at lower frequency bands.Expand
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Tropospheric delay statistics measured by two site test interferometers at Goldstone, California
[1] Site test interferometers (STIs) have been deployed at two locations within the NASA Deep Space Network tracking complex in Goldstone, California. An STI measures the difference of atmosphericExpand
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26-GHz data downlink for LEO satellites
TLDR
State-of-the art downlink technology allows Low Earth Orbit (LEO) satellites for Earth observation (EO) to downlink just above 500 Mb/s in the X-band due to bandwidth limitations. Expand
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Predicting Sparse Array Performance From Two-Element Interferometer Data
Widely distributed (sparse) ground-based antenna arrays are being considered for deep space communications applications with the development of the proposed Next Generation Deep Space Network.Expand
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Simultaneous Ka-Band Site Characterization: Goldstone, CA, White Sands, NM, and Guam, USA
To statistically characterize atmospheric effects on Ka-band links at NASA operational sites, NASA has constructed site test interferometers (STI s) which directly measure the tropospheric phaseExpand
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Two Years of Simultaneous K(sub a)-Band Measurements: Goldstone, CA; White Sands, NM; and Guam, USA
In order to statistically characterize the effect of the Earth's atmosphere on Ka-Band links, site test interferometers (STIs) have been deployed at three of NASA s operational sites to directlyExpand
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Preliminary experiments for the assessment of V/W-band links for space-earth communications
Since September 2012, NASA Glenn Research Center has deployed a microwave profiling radiometer at White Sands, NM, to estimate atmospheric propagation effects on communications links in the V and WExpand
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Compensation of reflector antenna surface distortion using an array feed
Various aspects of reflector surface distortion compensation are explored by first assuming the reflector distortion is given and then designing the compensating feed array. The sensitivity ofExpand
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Compensation of reflector surface distortions using conjugate field matching
  • R. Acosta
  • Physics, Engineering
  • Antennas and Propagation Society International…
  • 1986
The feasibility of compensating for reflector surface distortions has been investigated. The performance characteristics (gain, sidelobe level, null location, beamwidth, etc.) of space communicationExpand
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