Aperiodic array antenna
First Claim
Patent Images
1. An antenna apparatus comprising:
- an active antenna element;
at least two passive antenna elements individually selectable to operate in either a reflective mode or a transmissive mode; and
a resonant strip positioned adjacent at least one respective passive antenna element, the resonant strip serving to increase gain of the antenna apparatus, the combination of the resonant strip and respective passive antenna element providing a dipole element.
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Abstract
An antenna array that uses at least two passive antennas and one active antenna disposed above a ground plane, but electrically isolated from the ground plane, and a respective resonant strip positioned beneath each passive antenna. The passive antenna elements are positioned about the active element, and each of the at least two passive antenna elements is individually set to a reflective or a transmissive mode to change the characteristics of an input/output beam pattern of the antenna apparatus.
46 Citations
16 Claims
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1. An antenna apparatus comprising:
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an active antenna element; at least two passive antenna elements individually selectable to operate in either a reflective mode or a transmissive mode; and a resonant strip positioned adjacent at least one respective passive antenna element, the resonant strip serving to increase gain of the antenna apparatus, the combination of the resonant strip and respective passive antenna element providing a dipole element. - View Dependent Claims (2, 3, 4, 5)
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6. An antenna apparatus comprising:
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an active antenna element; at least two passive antenna elements individually selectable to operate in either a reflective mode or a transmissive mode; a resonant strip positioned adjacent at least one respective passive antenna element, the combination of the resonant strip and respective passive antenna element providing a dipole element; and a cylindrical ground plane disposed adjacent at least one of the antenna elements, wherein the top side of the ground plane is a planar end of the cylinder, and the bottom side of the ground plane is an opposite planar end of the cylinder.
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7. An antenna apparatus comprising:
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an active antenna element; at least two passive antenna elements individually selectable to operate in either a reflective mode or a transmissive mode; and a resonant strip positioned adjacent at least one respective passive antenna element, wherein each resonant strip is disposed within a respective slot of a ground plane, the walls of each slot being spaced apart from the surface of the respective resonant strip, and the space between the walls and the surface being filled with nonmetallic material to electrically isolate a non-top end portion of the resonant strip from the ground plane, the combination of the resonant strip and respective passive antenna element providing a dipole element; and
wherein the antenna apparatus provides a directed beam along a horizon.
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8. An antenna apparatus comprising:
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an active antenna element; at least two passive antenna elements individually selectable to operate in either a reflective mode or a transmissive mode; a resonant strip positioned adjacent at least one respective passive antenna element, the combination of the resonant strip and respective passive antenna element providing a dipole element; and a ground plane disposed adjacent at least one of the antenna elements, the ground plane is formed of two or more plates equal in number to the number of resonant strips. - View Dependent Claims (9, 10, 11, 12)
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13. An antenna apparatus comprising:
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an active antenna element; at least two passive antenna elements individually selectable to operate in either a reflective mode or a transmissive mode; a resonant strip positioned adjacent at least one respective passive antenna element, the combination of the resonant strip and respective passive antenna element providing a dipole element; and the passive antenna elements are formed on one side of a printed circuit board, and the active antenna element is formed on another side of the printed circuit board. - View Dependent Claims (14, 15, 16)
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Specification