太赫兹极高分辨力雷达成像试验研究  

Experimental research on high resolution terahertz radar imaging

作　　者：蔡英武[1] 杨陈[1] 曾耿华[1] 黄祥[1] 王成[1] 江舸[1] 李如忠[1] 陶荣辉[1] 张健[1] 周传明[2] 姚军[1] 

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]中国工程物理研究院,四川绵阳621900

出　　处：《强激光与粒子束》2012年第1期7-9,共3页High Power Laser and Particle Beams

摘　　要：给出了一种载频0.14 THz、带宽5 GHz的极高分辨力太赫兹雷达成像系统样机。系统采用Ka波段毫米波信号二倍频后作为样机收发链路的谐波混频本振,以线性调频连续波信号作为发射信号,接收时采用去斜接收。利用该太赫兹雷达进行了成像试验并得到了1维距离像与逆合成孔径雷达(ISAR)成像结果。结果表明,THz雷达样机实现了3 cm的高分辨力,其ISAR像清晰,反映了目标的细微特征。The design and realization of a terahertz（THz） radar system with 0.14 THz carrier frequency and 5 GHz bandwidth have been presented.The Ka band signal was frequency-doubled to be used as the local oscillator signal for sub-harmonic mixer in the system＇s transceiver chain.For the transmitted signal was a linearly frequency-modulated continuous-wave（LFM-CW）,the dechirp technique was used in the THz radar receiver front end.By using this THz radar system,3 cm high resolution range profiles were obtained as well as inverse synthetic aperture radar（ISAR） images,which exactly represent the subtle features of targets.

关 键 词：太赫兹 宽带雷达 极高分辨力 ISAR成像 

分 类 号：TN95[电子电信—信号与信息处理]