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Antenna Beam Coverage Concepts

AUTHOR Nasa, National Aeronautics and Space Adm
PUBLISHER Independently Published (10/26/2018)
PRODUCT TYPE Paperback (Paperback)

Description
The strawman Personal Access Satellite System (PASS) design calls for the use of a CONUS beam for transmission between the supplier and the satellite and for fixed beams for transmission between the basic personal terminal and the satellite. The satellite uses a 3 m main reflector for transmission at 20 GHz and a 2 m main reflector for reception at 30 GHz. There are several types of spot beams under consideration for the PASS system besides fixed beams. The beam pattern of a CONUS coverage switched beam is shown along with that of a scanning beam. A switched beam refers to one in which the signal from the satellite is connected alternatively to various feed horns. Scanning beams are taken to mean beams whose footprints are moved between contiguous regions in the beam's coverage area. The advantages and disadvantages of switched and/or scanning beams relative to fixed beams. The consequences of using switched/scanning in lieu of fixed beams in the PASS design and attempts are made to evaluate the listed advantages and disadvantages. Two uses of switched/scanning beams are examined. To illustrate the implications of switched beams use on PASS system design, operation at two beam scan rates is explored. Estabrook, Polly and Motamedi, Masoud Jet Propulsion Laboratory...
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Product Details
ISBN-13: 9781729308219
ISBN-10: 172930821X
Binding: Paperback or Softback (Trade Paperback (Us))
Content Language: English
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Page Count: 52
Carton Quantity: 78
Product Dimensions: 8.50 x 0.11 x 11.02 inches
Weight: 0.32 pound(s)
Country of Origin: US
Subject Information
BISAC Categories
Science | Space Science - General
Descriptions, Reviews, Etc.
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The strawman Personal Access Satellite System (PASS) design calls for the use of a CONUS beam for transmission between the supplier and the satellite and for fixed beams for transmission between the basic personal terminal and the satellite. The satellite uses a 3 m main reflector for transmission at 20 GHz and a 2 m main reflector for reception at 30 GHz. There are several types of spot beams under consideration for the PASS system besides fixed beams. The beam pattern of a CONUS coverage switched beam is shown along with that of a scanning beam. A switched beam refers to one in which the signal from the satellite is connected alternatively to various feed horns. Scanning beams are taken to mean beams whose footprints are moved between contiguous regions in the beam's coverage area. The advantages and disadvantages of switched and/or scanning beams relative to fixed beams. The consequences of using switched/scanning in lieu of fixed beams in the PASS design and attempts are made to evaluate the listed advantages and disadvantages. Two uses of switched/scanning beams are examined. To illustrate the implications of switched beams use on PASS system design, operation at two beam scan rates is explored. Estabrook, Polly and Motamedi, Masoud Jet Propulsion Laboratory...
Show More
Paperback