对DARPA 提出的相干光带雷达的概念、方法和工作原理做了阐述。首先,介绍了具有非频变特性的等角螺旋天线及其在纳米尺度的制作工艺;其次,讨论了系统架构设计,通过参考源的扫频方式实现对宽波段信号的相干接收和处理,从而获得场景和目标的全电磁频谱特征;最后,探讨了天线单元的阵列形式,通过阵列的分组和单元尺寸的控制,使得相干光带雷达的频率检测范围从X 射线到毫米波。

This paper expounded on the concept, method and principle of coherent lightband radar recommended by DARPA. First, it introduced the frequency-independent equiangular spiral antenna and its fabrication technics at the nanometer scale. Next, it discussed the system design. By means of frequency sweep, the coherent receiving and processing for broad band signal could be achieved, and the full-electromagnetic spectrum characteristics would be obtained. Finally, it dealt with the antenna array forms.

TN957.51