Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1982-07-12
1986-07-22
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343882, 33268, H01Q 300
Patent
active
046022597
ABSTRACT:
A polar mount for a parabolic satellite tracking antenna insures close tracking of the antenna to a synchronous satellite track sector bearing multiple satellites within the earth's equatorial plane. The apparatus tilts the polar pivot axis of the antenna and the dip of the antenna boresight to cause an elliptical antenna track which better approximates the track of the synchronous satellite. The antenna is provided with a removable Polaris telescope alignment fixture to permit selective adjustment of the tilt angle at a sine setting derived from specific formula prior to aligning the antenna mount for true north and with further ajustment for dip angle or declination to achieve alignment accuracy within thirty arc-seconds of the antenna boresight to the satellite track sector bearing the satellites whose signals are to be received. A zero backlash linear actuator selectively drives the antenna about the polar axis to sweep the satellite track sector, with exacting alignment, from satellite to satellite.
REFERENCES:
patent: 3464116 (1969-09-01), Kissell
patent: 4232320 (1980-11-01), Savalle, Jr.
patent: 4257048 (1981-03-01), Yokoi et al.
patent: 4454658 (1984-06-01), Lewis et al.
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