一种低冗余二维综合孔径辐射计天线阵列布局

Layout of 2D Low Redundancy Array of Synthetic Aperture Radiometer

干涉综合孔径微波辐射计是利用孔径合成技术实现高分辨率的无源微波雷达成像系统,天线阵的优化设计是系统设计中的一个关键问题。文章提出了一种利用一维低冗余线性阵列构造低冗余二维天线阵列的方法,并将其设计阵列的冗余度与常规‘U’形、‘T’形阵列的冗余度进行了分析比较。分析结果表明,当天线单元数目足够多时,文中提出的阵列布局方式比常规的‘U’形、‘T’形阵列布局方式可节省11%～19%的通道数目。

The synthetic aperture radiometer（SARad） is a passive microwave imaging device with high spatial resolution using synthetic aperture technology.The optimization of antenna array configuration plays a key role in SARad design.In this paper a two dimension array design method using low redundancy linear array is presented.The redundancy of the designed array is compared with that of the regular U-shaped and T-Shaped arrays,and the results shows that the proposed array can save approximately 11%～19% antennas when the number of antennas is large enough.