等效相位中心原理的应用为多发多收合成孔径雷达(MIMO-SAR)的天线设计提供了更大的自由度。文中阐述了等 效相位中心原理,分析了传统ARTINO天线配置,指出由于其发射阵元布设于机翼处而剧烈抖动造成图像模糊的问题。 然后,对传统ARTINO天线结构进行了改进,并提出了发射居中紧凑和接收居中紧凑2种天线构形。最后,对4种天线构 形的方向图进行了仿真。结果表明,MIMO-SAR采用等效相位中心原理进行天线结构配置,可以在保证天线方向图具有 良好指向性的同时,提高天线配置的灵活性并降低成本。

The application of the effective phase center (EPC) principle provides a more freedom of degree for antenna configuration of multi-input multi-output SAR(MIMO-SAR). EPC principle is expatiated. Traditional ARTINO antenna configuration is analyzed. The transmitting elements are violent vibrating for locating at the wing tips, which blurs the image. Then, antenna array is ameliorated for the traditional ARTINO. Center-transmitter collocated model and center-receiver collocated model are put forward. Finally, antenna pattern of the above models is simulated. The simulation results indicated that MIMO SAR antenna configuration design using EPC principle could ensure the favorable pattern directionality, and improve the design flexibility of the antenna geometry and reducing cost.

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