| 摘要 |
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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