摘要
设计并加工测试了一款适用于瞬时大功率电磁脉冲测量的超宽带TEM波喇叭天线。该天线的馈电部分采用同轴宽带巴伦,辐射单元由两片平滑、渐变的金属曲面组成。为了实现天线的超宽带特性,同轴巴伦和辐射单元均采用指数渐变的形式。而为了提高天线的功率容量,将大功率同轴宽带巴伦和辐射单元直接相连。仿真和实测结果表明该天线在0.5~6GHz频率范围内,其电压驻波比VSWR≤2,平均增益Gain≥8dB,增益平坦性在±1dB之内.满足电磁脉冲测量的基本需求。
An ultra-wideband high-power TEM horn antenna for electromagnetic pulse measurement is designed and measured. The feed line of the antenna is made of coaxial ultra-wideband balun. The radiation u- nits are composed of two smooth and graded metal surfaces. In order to achieve the ultra-wideband characteristics, the balun and radiation units are used in the form of exponential gradient. Meanwhile, the antenna is fed by coaxial ultra-wideband balun directly to improve the power capacity. Measured results show that the VSWR of the antenna is less than 2 with bandwidth of 0. 5 - 6GHz, and its average gain is higher by 8 dB over the same band. Moreover, the gain flatness is in -+ 1 dB.
出处
《西北大学学报(自然科学版)》
CAS
CSCD
北大核心
2016年第4期519-524,共6页
Journal of Northwest University(Natural Science Edition)
基金
陕西省教育厅自然科学专项基金资助项目(11JK1039)
西北大学自然科学基金资助项目(12NW26)
关键词
超宽带天线
TEM喇叭
同轴宽带巴伦
uhra-wideband antenna
TEM horn
coaxial ultra-wideband balun