Electronic beam steering for keyhole avoidance

Details Electronic beam steering for keyhole avoidance Electronic beam steering for keyhole avoidance

2008-01-29

2008-01-29

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including antenna orientation

C342S074000, C342S075000, C343S757000

Reexamination Certificate

active

07324046

ABSTRACT:
An airborne radio frequency (RF) antenna terminal system includes a two-axis gimbals control system and a phased array antenna. The phased array antenna electronically steers the receive and transmit beams using phase shifters. The electronically steered beams provide a virtual third-axis for the two-axis gimbals control system. The combination of the electronically steered beams and the two-axis gimbaled system provides accurate beam steering for the keyhole region of the two-axis gimbals control system so that the RF communication link is prevented from being lost in the keyhole region.

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