Performance characteristics of the Apollo astronaut backpack antenna
Jefferson Franklin Lindsey, Manned Spacecraft Center (U.S.), United States. National Aeronautics and Space Administration
National Aeronautics and Space Administration, 1969 - Science - 20 pages
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48-inch-diameter ground plane 6-foot standing height ABSOLUTE GAINS ahertz ANTENNA By Jefferson antenna gain Antenna pattern data APOLLO ASTRONAUT BACKPACK astronaut antenna ASTRONAUT BACKPACK ANTENNA astronaut for extravehicular-activity astronaut standing ranged bending-over and lying-down circuit margin calculations decibels dielectric constant EVA antenna extravehicular-activity communications free-space data free-space patterns frequencies of 259 gains are referenced gains range grazing angle height-gain correction factor isotropic level established Jefferson F level of vertical level of vertical-linear linear polarization established loss is required lunar surface lying-down positions megahertz monopole antenna NASA Manned Spacecraft patterns and voltage-standing-wave-ratio perfect isotropic level PLSS polarization loss factor position by substitution range from 28 reference isotropic level Reflection effects included shown in figure smooth-surface reflection effects Spacecraft Center standard-gain dipole standard-gain reference dipole standing position steel-tape monopole surface-reflection effects included test setup three operational frequencies transmission loss transmitting antenna vertical reflection coefficient vertical-linear polarization voltage standing-wave ratios VSWR test