星载分离相位中心方位多波束(DPCMAB)合成孔径具有方位向高分辨率成像和宽幅测绘的能力,但是方位多波束间幅相特性不一致影响其性能。文中在分析DPCMAB基本原理的基础上,从合理选择子阵相位参考点和对通道间幅相不平衡校准两个方面提出了消除波束间特性不一致的方法,对工程实现具有参考意义。

The basic principle of the spaceborne DPCMAB SAR with the characteristics of high azimuth resolution and wide swath imaging is discussed firstly, whereas, the performance will be degraded due to the amplitude and phase imbalance among the multiple azimuth beams. By properly choosing the phase reference of the subarray and precisely calibrating the channel imbalance, an effective method is proposed to mitigate the imbalance in this paper, which is of great practical value.