Effect of Downlink Phased Array Patterns on System Availability Contour Predictions.
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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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 Cranes 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
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation
- Unmanned Spacecraft