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中文摘要：
数字阵列雷达（Digital Array Radar, DAR）用于合成孔径雷达（Synthetic Aperture Radar, SAR）成像能够同时完成多种成像模式，具有广阔的应用前景。该文首先对DAR的基本硬件结构和工作原理进行介绍。在此基础上，结合数字波束形成（Digital BeamForming, DBF）技术，提出6种可同时实现多模式SAR成像的工作方式，并对各种工作方式给出了相应的新颖的成像模式。此外，以某种新颖的模式为例，给出了其系统设计的详细过程。最后通过仿真实验验证了该成像模式的有效性及正确性。
英文摘要：
Digital Array Radar （DAR） has the ability of simultaneous multimode imaging and has many potential applications. This paper firstly introduces the basic hardware structure and the operation principle of DAR. Combined with the Digital BeamForming （DBF） technique, six operational modes that can be used in multimode Synthetic Aperture Radar （SAR） imaging are proposed, and the corresponding novel imaging modes are produced. Moreover, the design of the novel imaging modes is introduced in detail. The simulation results confirm the efficiency and precision of the imaging modes.
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