天线系统的最佳风力矩中心、重心、旋转中心合而为一通常称“三心合一”。“三心合一”设计能有效降低传动系统的驱动功率，使天线运转平稳可靠。本文通过剖析具有代表性的某大型相控阵雷达天线统计设计，探讨实现“三心合一”的设计方法。

The center of three-in-one combination means the optimum center of wind moment , center of gravity and center of rotation of antenna system are Combined. It can reduce the power of driving mechanism effectively, and make antenna rotate more steadily. The design of a characteristic phased array 3D radar antenna system is discussed and the main path realizing the center of three-in-one combination is proposed in this paper.

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