实时延迟线性能对SAR成像质量的影响分析  

Analysis of effect of real-time delay line performance on SAR imaging quality

作　　者：李敏慧[1] 江居德[1] 朱力[1] 

机构地区：[1]南京电子技术研究所,南京210013

出　　处：《中国电子科学研究院学报》2006年第6期536-539,共4页Journal of China Academy of Electronics and Information Technology

摘　　要：对宽带有源相控阵天线中实时延迟线对SAR图像性能的影响进行了仿真和分析。仿真分析结果表明,对于瞬时带宽为1 GHz的信号,长度为4 m、最大扫描角为20°和工作于S波段的有源相控阵线阵,若不使用延迟线,压缩脉冲主瓣展宽到理想情况的9.30倍,不能产生正确的SAR图像;若使用延迟线,可将每个天线单元接收信号之间的时差补偿到合理的范围,使SAR图像性能满足分辨目标的要求。The effect of real-time delay line of the active phased array wideband antenna on SAR image performance is analyzed and simulated. The simulation results show that the delay line affects image quality. Without any delay line, the resolution of SAR image worses, and the targets can not be resolved. On the contrary, by using the delay line, the time delay among signals received by all antenna units can be compensated to reach a reasonable range, which meets the target resolution requirement of SAR image performance.

关 键 词：宽带信号 实时延迟线 脉冲压缩 分辨率 相控阵雷达 成像质量 

分 类 号：TN958.92[电子电信—信号与信息处理]