分布式相参雷达辐射场分析

分布式相参雷达因一改传统大口径雷达机动性差、造价昂贵等缺陷,故受到了雷达界广泛关注,同时,它也是下一代雷达发展的方向。分析了分布式雷达相参发射的基本原理,得到了相参合成的条件,采用电磁软件仿真了分布式相参雷达辐射场的特性。通过仿真发现:短基线相参雷达的相参合成区域呈现条纹状,在主波束范围内场强同样呈现条纹状；长基线相参雷达的相参合成区域呈现复杂的尖峰结构,在主波束范围内场强相比短基线雷达变化更为剧烈。研究结果对相参发射具有一定的指导意义。

Radiation Field Analysis for Distributed Coherent Radar

Distributed coherent radar has attracted widespread attention in the radar field and is expected to the next gen.eration radar, because it can overcome defects of traditional large-aperture radar such as poor maneuverability and expen.sive cost. In this paper, the fundamentals of coherent transmition of distributed radar are analyzed, the coherent synthesisconditions are presented, and the radiation field characteristics of distributed coherent radar are simulated using electro.magnetic software. The simulation shows that the coherent synthesis area of short baseline radar exhibits a stripe shape,and the electric field strength in the main beam shows the same stripe shape. However, the coherent synthesis area of longbaseline radar exhibits a peak shape, and the electric field strength has a more drastic change than that of short baseline ra.dar. Research of the radiation field could be helpful to the study of coherent transmission.