摘要
针对沥青路面层厚检测需求,设计了一种简单紧凑的超宽带横向电磁波（Transverse Electromagnetic,TEM）喇叭天线.相对于传统TEM喇叭天线的大尺寸设计,通过采用合理的指数渐变结构以及加载吸波材料,有效地减小了天线尺寸,极大地拓展了天线的阻抗带宽.仿真及测量结果表明：设计的TEM喇叭天线在0.83～12.8 GHz带宽内具有小于2的低电压驻波比,良好的辐射特性和较小的振铃,能够满足路用探地雷达系统要求.
A simple ultra-wideband transverse electromagnetic（TEM）horn antenna is proposed for the asphalt pavement investigation. Comparing with the conventional TEM horn antenna design in a large size, the size of the proposed antenna is effectively reduced and the impedance bandwidth is largely extended through the proper exponentially-ta- pered structure and loaded absorbing material. Simulated and measured results show that the proposed TEM horn antenna has a low voltage standing wave ratio below 2 over the whole band from 0.83 to 12.8 GHz, good radiation characteristics and small late-time ringing,which can well meet the requirements of the ground penetrating radar （GPR） system.
出处
《电波科学学报》
EI
CSCD
北大核心
2014年第4期723-728,共6页
Chinese Journal of Radio Science
基金
国家高技术研究发展计划(2012AA121901)
关键词
探地雷达
超宽带天线
指数渐变
吸波材料
ground penetrating radar
ultrawideband antenna
exponentially-taper
ab-sorbing material
