Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Patent
1998-06-05
1999-08-10
Wong, Don
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
343853, 342372, H01Q 324
Patent
active
059365889
ABSTRACT:
A reconfigurable multiple beam phased array antenna has radiating elements arranged in a planar array and variable phase shifters. Each one of the phase shifters is connected to a respective one of the radiating elements. The array antenna further includes a beam forming network for forming spot and regional beam signals. The beam forming network forms a regional beam signal from a combination of spot beam signals. The beam forming network has two dimensional stacks of Rotman lenses provided with a first set of ports. Each one of the first set of ports is connected to a respective one of the radiating elements with. The Rotman lenses generate frequency invariant spot beam signals which are communicated between the radiating elements and the Rotman lenses via the first set of ports for transmission and reception of spot beams and regional beams by the radiating elements. The phase shifters are adjusted to steer the spot and regional beams to desired locations.
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Law Philip H.
Ramanujam Parthasarathy
Rao Sudhakar K.
Vaughan Robert E.
Grunebach Georgann
Gudmestad Terje
Phan Tho
Sales Michael W.
Wong Don
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