Phased array antenna with steerable null
First Claim
1. An apparatus, comprising:
- an array of patch antennas;
a switch/phase shifter network capable of combining said patch antennas in a selected sequential group and wherein by stepping said group throughout said patch antennas, a plurality of main beam positions can be created with at least one of said main beam positions capable of being active with the remaining main beam positions idle; and
wherein by sampling energy from said remaining idle antenna elements, a second beam is formed that is capable of creating a null signal in the direction of said second beam.
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Abstract
An embodiment of the present invention provides an apparatus, comprising an array of patch antennas and a switch/phase shifter network capable of combining the patch antennas in a selected sequential group and wherein by stepping the group throughout the patch antennas, a plurality of main beam positions can be created with at least one of the main beam positions capable of being active with the remaining main beam positions idle, and wherein by sampling energy from the remaining idle antenna elements, a second beam is formed that is capable of creating a null signal in the direction of the second beam. In an embodiment of the present invention, the array of patch antennas may be a circular array and the stepping the group around the array is stepping the group around a circumference of the circular array of patch antennas.
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Citations
24 Claims
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1. An apparatus, comprising:
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an array of patch antennas;
a switch/phase shifter network capable of combining said patch antennas in a selected sequential group and wherein by stepping said group throughout said patch antennas, a plurality of main beam positions can be created with at least one of said main beam positions capable of being active with the remaining main beam positions idle; and
wherein by sampling energy from said remaining idle antenna elements, a second beam is formed that is capable of creating a null signal in the direction of said second beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of creating a steerable null in a phased array antenna, comprising:
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disposing an array of patch antennas within a receiver;
combining said patch antennas by a switch/phase shifter network into a selected sequential group and stepping said group through said patch antennas thereby creating a plurality of main beam positions with at least one of said main beam positions capable of being active with the remaining main beam positions idle; and
sampling energy from said remaining idle antenna elements in order to form a second beam that is capable of creating a null signal in the direction of said second beam. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification