Multibeam phased array antenna
First Claim
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1. A method of determining array element excitations for input data signals of an array antenna, the method comprising:
- evaluating initial array element excitations to determine intermodulation interference generated when the input data signals are transmitted as corresponding antenna beams;
determining expected performance of the antenna beams corresponding to the input data signals relative to the intermodulation interference; and
modifying the initial array element excitations to generate modified array element excitations to improve the expected performance of the antenna beams relative to the intermodulation interference.
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Abstract
Systems and methods provide intermodulation reduction techniques for multiple beam phased array antennas. For example, in accordance with an embodiment of the present invention, an optimization approach is employed to determine array element excitations that reduce IM interference.
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Citations
25 Claims
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1. A method of determining array element excitations for input data signals of an array antenna, the method comprising:
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evaluating initial array element excitations to determine intermodulation interference generated when the input data signals are transmitted as corresponding antenna beams;
determining expected performance of the antenna beams corresponding to the input data signals relative to the intermodulation interference; and
modifying the initial array element excitations to generate modified array element excitations to improve the expected performance of the antenna beams relative to the intermodulation interference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An antenna system comprising:
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beam forming modules adapted to receive input signals and control signals;
amplifiers associated with the beam forming modules;
array elements coupled to corresponding ones of the amplifiers;
memory storing instructions; and
a processor adapted to execute the instructions to calculate expected intermodulation interference and modify the control signals to reduce the intermodulation interference. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of optimizing array element excitations for input signals to an array antenna, the method comprising:
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calculating one or more antenna beam parameters corresponding to the input signals;
calculating one or more antenna beam parameters corresponding to intermodulation interference;
calculating a difference between the antenna beam parameters corresponding to the input signals relative to the antenna beam parameters corresponding to the intermodulation interference; and
modifying the array element excitations to reduce the intermodulation interference. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification