对频率分集阵列(FDA)雷达的概念进行了延伸,提出了带有脉冲维调制的二维FDA 阵列雷达,分析了二维FDA 雷达天线方向图的形成,研究了波束指向随距离和时间的变化规律。针对其在机载探测领域中的应用,仿真分析了杂波分布特性,给出了在杂波背景下检测目标,提升目标信杂噪比的方法。二维调频FDA 设计理念为机载雷达在杂波背景下检测目标提供了新思路。

The conception of frequency diverse array ( FDA) is extended in this paper, center frequency modulated pulses are settled in its array witch is defined 2D-FDA radar in this paper. The beamforming as well as direction pattern changing with range and time are analyzed in 2D-FDA radar. For its application in airborne detection radar, the clutter characteristics and its distribution are studied by simulation. The scheme for moving target detection in clutter environment is proposed at last, explaining how the target SCNR can be promoted. The 2D-FDA will be a novel idea for airborne radar detecting targets in clutter environment.

TN957.52