Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1998-04-06
2000-08-29
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
343757, 343763, 343882, H01Q 300
Patent
active
061115428
ABSTRACT:
A user terminal (110) includes a rotating electronically steerable antenna system (210) which combines coarse mechanical beam steering with fine electronic beam steering to provide full hemispherical coverage and enable hand-offs in a satellite communication system. The antenna system (210) comprises at least one antenna unit (and preferably two antenna units) including a mechanically rotatable base (330), an antenna holder (320) coupled to the mechanically rotatable base, and two electronically steerable antenna subunit (310) mounted on the antenna holder. Antenna system (210) also includes an antenna unit controller (260) adapted to control rotation of the mechanically rotatable base (330).
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Day Kevin Kristopher
Locke John Wesley
Torkington Richard Scott
Motorola Inc.
Pham Dao L.
Tarcza Thomas H.
Wuamett Jennifer B.
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