Adding a directional antenna between a 2D planar phased array antenna and an ellipsoidal antenna radome extends the radiation phase center of antenna arrays from 2D to 3D,which renders classical planar phased array beam-steering algorithms no longer applicable.Based on a high-gain directional antenna array,a beam-steering algorithm for 3D arrays is proposed.The algorithm cor-rects interpulse beam pointing in the mechanical and phase scanning mode,thereby enhancing beam scanning precision.A detailed engineering implementation process is provided.Finally,the per-formance advantages of the new algorithm are validated through ground testing,and its detection capabilities are confirmed through airborne target trials.
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