Communications: radio wave antennas – Antennas – With spaced or external radio wave refractor
Patent
1986-04-14
1988-05-10
Sikes, William L.
Communications: radio wave antennas
Antennas
With spaced or external radio wave refractor
343753, 343781P, 343781CA, H01Q 346
Patent
active
047439149
ABSTRACT:
A space fed antenna system is adapted to correct for beam pointing (squint) errors and collimation errors caused by frequency variations of the R.F. energy radiated by the antenna system. A subarray of radiating elements is spatially positioned between an electronic lens and the focal point of said lens. The subarray radiates R.F. energy with a spherical wavefront for illuminating the electronic lens, such spherical wavefront having a focal point coincident with the focal point of the electronic lens. A programmer is provided which controls the electronic lens to collimate and direct the R.F. energy from the subarray. A corporate feed is provided which couples to a plurality of phase shifters which feeds corresponding time delay units, which in turn feeds corresponding radiating elements in the subarray. The phase shifters, responsive to the programmer, provide the spherical wavefront to the R.F. energy radiated by radiating elements in the subarray. The time delay units, also responsive to the programmer, vary the phase of the R.F. energy radiated by said elements to correct the squint and collimation errors.
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Hanfling Jerome D.
Schuss Jack J.
Johnson Doris J.
Maginniss Christopher L.
Raytheon Company
Sharkansky Richard
Sikes William L.
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