Ground-based, wavefront-projection beamformer for a stratospheric communications platform
First Claim
Patent Images
1. A method for beamforming for an antenna array having a plurality of antenna elements comprising:
- (a) inputting element signals for said plurality of antenna elements;
(b) selecting a beam direction for a beam; and
selecting an element ensemble that substantially coincides with a wavefront projection on the antenna array for the beam having the beam direction for each phase increment Δ
α
.
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Abstract
A method for beamforming signals for an array of receiving or transmitting elements includes the steps of selecting a beam elevation and azimuth and grouping elements of an antenna array into element ensembles that are substantially aligned with a wavefront projection on the antenna array corresponding to the selected beam elevation and azimuth.
15 Citations
25 Claims
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1. A method for beamforming for an antenna array having a plurality of antenna elements comprising:
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(a) inputting element signals for said plurality of antenna elements;
(b) selecting a beam direction for a beam; and
selecting an element ensemble that substantially coincides with a wavefront projection on the antenna array for the beam having the beam direction for each phase increment Δ
α
. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25)
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13. A method for beamforming for an antenna array having a plurality of antenna elements generating a plurality of beams, said method comprising:
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(a) inputting element signals for said plurality of antenna elements;
(b) selecting a respective beam direction for each of the plurality of beams; and
(c) selecting a plurality of element ensembles that substantially coincide with respective wavefront projections on the antenna array for the each of the plurality of beams having the respective beam direction for each phase increment Δ
α
.
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23. A method for beamforming for an antenna array having a plurality of antenna elements comprising:
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inputting element signals for said plurality of antenna elements;
selecting a beam direction for a beam; and
selecting an element ensemble that substantially coincides with a wavefront projection on the antenna array for the beam having the beam direction; and
thereafter, phase weighting the wavefront projection to form a phase weighted signal; and
outputting the phase weighted signal to a beam port.
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Specification