摘要
针对太赫兹频段具有大带宽的特点,阐述了太赫兹波段进行高分辨力成像的原理,按照微波上变频的方法,将微波源通过混频和倍频方式得到太赫兹频率源;采用频率步进脉冲体制,设计和实现了220GHz太赫兹主动成像系统;并在暗室和外场进行了分辨力测试和拉距实验,获得的纵向分辨力达4cm,测试距离达10m。
Wide band can be achieved in terahertz （THz） spectrum, so a high resolution terahertz imaging system can be realized according to the radar imaging theory. The stepped THz pulse is obtained by mixing and multiplying the microwave source, and a 220 GHz terahertz active imaging system is designed and developed. The resolution experiments of two reflectors imaging are performed in an anechoic chamber, and the range experiment is done outdoor, which shows that the resolution is up to 4 cm and the range reaches 10 m.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2013年第6期1605-1608,共4页
High Power Laser and Particle Beams
基金
国防基础预研基金项目
