一种分布式孔径阵列中的同步和校正方法  

A Synchronization and Correction Method forthe Distributed Aperture Array

作　　者：荣大伟[1] 彭国良[1] 陶小辉[1] 曹锐[1] RONG Dawei;PENG Guoliang;TAO Xiaohui;CAO Rui(The 38th Research Institute of CETC,Hefei 230088)

机构地区：[1]中国电子科技集团公司第三十八研究所,合肥230088

出　　处：《火控雷达技术》2024年第3期29-33,共5页Fire Control Radar Technology

摘　　要：分布式孔径阵列实现了传统大孔径雷达的效能,规避了传统大孔径雷达的弊端,但因其体制特点带来新的问题。不同孔径单元之间有同步误差,以及接收机通道间的幅相不一致性,这些误差会造成相控阵天线接收波束的指向发生变化、副瓣增高、天线增益下降等一系列问题,导致分布式孔径阵列性能下降。为了实现分布式系统的全相参工作,需要各单元雷达之间时间、空间和相位的同步。本文采用单元间同步和内校正的方法实现了分布式孔径阵列的同步,并在工程应用中取得了较好的效果。The distributed aperture array achieves effectiveness of the traditional large aperture radar,avoiding the drawbacks of the traditional large aperture radar,however,it brings new problems because of its structure.There are synchronous errors among different aperture units and the amplitude-phase imbalance of a multi-channel radar receivers.These errors lead to beam direction changes,high slide lobe,and antenna gain loss and other issues,which results in the performance degradation of the distributed aperture array.To realize the full coherent distributed system,it's necessary for all of the radar units working in synchronization for time,space and phase.In this paper,the method of synchronization among array units and inner correction was adopted to realize the synchronization of the distributed aperture array,and it was effective in engineering application.

关 键 词：分布式孔径阵列 同步 幅相不平衡 相参合成 

分 类 号：TN95[电子电信—信号与信息处理]