Conformal radar antenna
First Claim
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1. A system for conformally scanning an array of antennas in space comprising:
- a coherent signal source;
means for providing a series of first output signals from said coherent signal source on a series of outputs having a progressive linear phase shift between adjacent outputs;
matrix means for condensing said series of first output signals to one of a series of second outputs; and
,directive antenna elements connected to said series of second outputs.
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Abstract
A conformal electronically scanned antenna array system utilizing an inve Butler matrix in combination with directive antenna elements. The system provides a simple and inexpensive device for scanning an elemental array without the problems of output frequency shift or mutual coupling between antenna elements.
35 Citations
18 Claims
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1. A system for conformally scanning an array of antennas in space comprising:
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a coherent signal source; means for providing a series of first output signals from said coherent signal source on a series of outputs having a progressive linear phase shift between adjacent outputs; matrix means for condensing said series of first output signals to one of a series of second outputs; and
,directive antenna elements connected to said series of second outputs. - View Dependent Claims (2, 3, 4)
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5. An electronically scanned antenna array system for scanning a beam in space comprising:
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scource means for providing a coherent microwave electronic signal; means connected to said source means for providing a plurality of ouptput signals having a linear progressive phase shift between adjacent output signals; linear matrix means for passively encoding said plurality of output signals in accordance with the magnitude of said progressive linear phase shift to concentrate said plurality of output signals on at least one matrix output; and
,directive antenna elements connected to each matrix output for scanning a beam in the direction of said directive antenna element. - View Dependent Claims (6, 7)
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8. An electronically scanned antenna array system for scanning a beam in space comprising:
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a plurality of directive antenna elements for receiving signals from a plurality of directions in space; passive matrix means for encoding each of said signals received from said directive antenna elements into a plurality of output signals having a linear progressive phase shift between adjacent output signals; means connected to said passive matrix means for detecting linear progressive phase shifts to produce a single phase detector output representative of the output of one or more of said plurality of directive antenna elements; and
,means for receiving said single phase detector output. - View Dependent Claims (9)
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10. A system for conformally scanning an array of antennae in space comprising:
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a coherent signal source; means for providing a series of first output signals from said coherent signal source on a series of outputs having a progressive linear phase shift between adjacent outputs; matrix means for condensing said series of first output signals to a selected one of a series of second outputs; and
,directive antenna elements each connected to a different one of said series of second outputs. - View Dependent Claims (11, 12, 13)
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14. An electronically scanned antenna array system for scanning a beam in space comprising:
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source means for providing a coherent microwave electronic signal; means connected to said source means for providing a plurality of output signals having a linear progressive phase shift between adjacent output signals; linear matrix means for passively encoding said plurality of output signals in accordance with the magnitude of said progressive linear phase shift to concentrate said plurality of output signals on at least one matrix output; and
,directive antenna elements connected to each said matrix output for scanning a beam in the direction of said directive antenna element. - View Dependent Claims (15, 16)
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17. A system for conformally scanning an array of antennae in space comprising:
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a coherent signal source; means for providing a series of first output signals from said coherent signal source on a series of outputs having a progressive linear phase shift between adjacent outputs; matrix means for condensing said series of first output signals to a sequentially selected one of a series of second outputs; and
,directive antenna elements each connected to a different one of said series of second outputs.
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18. A system for conformally scanning an array of antennae in space comprising:
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a coherent signal source; means for providing a series of first output signals from said coherent signal source on a series of outputs having a progressive linear phase shift between adjacent outputs; matrix means for passively encoding said series of first output signals in accordance with the magnitude of said progressive linear phase shift to concentrate said first output signals on at least one matrix output; and
,directive antenna elements each connected to a different said matrix output.
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Specification