An intermodulation suppression method using phased array antenna electronics insignificantly degrades the desired primary main beams while substantially suppressing undesired intermodulation product beams, and particularly undesired third-ordered intermodulation product beams. The beam smearing method has two aspects, including phase smearing and angle smearing for respective subarrays to reduce the intermodulation-product beams of the phased array antenna beam patterns. With a 1 dB degradation of the primary main beams, a 6 dB to 10 dB suppression of the intermodulation product beams is achieved.
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