Antenna array for an inverse synthetic aperture radar
First Claim
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1. An antenna array comprising:
- an elongated top rail disposed parallel to an elongated bottom rail;
a plurality of racks coupled between the elongated top rail and the elongated bottom rail, each of the plurality of racks operable to be rotated about an axis and disposed at a spaced apart distance from each other, the spaced apart distance between each rack being adjustable, the axis of each of the plurality of racks being essentially parallel to one another; and
a plurality of antenna elements that are configured to transmits and receive microwave radiation in the L-band are configured on each of the plurality of racks, the plurality of antenna elements in each rack having an axial orientation that is essentially similar to one another and having a second orientation that is adjustable relative to one another, the second orientation being normal to the axial orientation;
wherein the plurality of antenna elements configured on at least one of the plurality of racks is operable to transmit microwave radiation and the plurality of antenna elements configured on the other plurality of rack are operable to receive electromagnetic radiation.
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Abstract
According to one embodiment, an antenna array includes a plurality of racks that are each configured with a plurality of antenna elements. Each rack may be rotated relative to the other racks through an axis that is generally parallel to the axis of other racks. Each antenna element within each rack has an axial orientation that is generally similar to and has an elevational orientation that is individually adjustable relative to one another.
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Citations
18 Claims
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1. An antenna array comprising:
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an elongated top rail disposed parallel to an elongated bottom rail; a plurality of racks coupled between the elongated top rail and the elongated bottom rail, each of the plurality of racks operable to be rotated about an axis and disposed at a spaced apart distance from each other, the spaced apart distance between each rack being adjustable, the axis of each of the plurality of racks being essentially parallel to one another; and a plurality of antenna elements that are configured to transmits and receive microwave radiation in the L-band are configured on each of the plurality of racks, the plurality of antenna elements in each rack having an axial orientation that is essentially similar to one another and having a second orientation that is adjustable relative to one another, the second orientation being normal to the axial orientation; wherein the plurality of antenna elements configured on at least one of the plurality of racks is operable to transmit microwave radiation and the plurality of antenna elements configured on the other plurality of rack are operable to receive electromagnetic radiation.
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2. An antenna array comprising:
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a plurality of racks operable to be rotated about an axis and disposed at a spaced apart distance from each other, the axis of each of the plurality of racks being essentially parallel to one another; and a plurality of antenna elements configured on each of the plurality of racks, the plurality of antenna elements in each rack having an axial orientation that is essentially similar to one another and having a second orientation that is adjustable relative to one another, the second orientation being normal to the axial orientation. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of generating inverse synthetic aperture radar imagery comprising:
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providing a plurality of racks rotatable about an axis and disposed a spaced apart distance from each other, the axis of each of the plurality of racks being essentially parallel to one another and aligned along a common plane, and a plurality of antenna elements configured on each of the plurality of racks, the plurality of antenna elements in each rack having an axial orientation that is essentially similar to one another and a second orientation that is adjustable relative to one another, the second orientation being normal to the axial orientation; adjusting the axial orientation of each of the plurality of racks with respect to one another, adjusting the second orientation of each antenna element relative to other antenna elements configured on its respective rack; moving the antenna array relative to a target; and generating imagery using microwave radiation received by at least a subset of the plurality of antenna elements. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification