摘要
将通常用于超宽带领域的IRA天线应用到辐射波电磁脉冲模拟器中,提出一种基于反射器脉冲辐射天线的核电磁脉冲辐射波模拟器,分析其天线结构,给出四种馈臂形式,通过仿真比较了四种馈臂形式天线的辐射效率、远场和近场波形以及频率增益特性。结果表明:该天线的低频辐射效率有待进一步提高;具有锥形渐缩形式馈臂的天线能产生较好的远场和近场波形。IRA天线相较笼形天线具有体积小、方向性好等优点,如果能进一步提高其低频辐射性能,IRA天线将成为理想的辐射波模拟器天线。
This paper presents a new kind of NEMP （ nuclear electromagnetic pulse） radiating-wave simulator based on impulse radiating antennas （IRA）, which are usally used for ultra-wide band communication. Structure of this antenna is analyzed and four types of feed-arm are designed. Simulations are implemented to have a comparison with the radiant efficieneies, field waveforms and frequency-gain characteristic curves among the four types of antenna. Results suggest that ： the antennas have lower radiant efficiency in the low-frequency domain and the antenna with tapered feeding arms can generate bet- ter far-field and near-field waveforms. IRAs take advantages of small volume and better directivity than cage antennas. If the low-frequency radiation performance can be enhanced, IRAs will make the ideal antenna used for radiating-wave simulator.
出处
《微波学报》
CSCD
北大核心
2012年第1期73-76,共4页
Journal of Microwaves
基金
总装备部试验技术研究合作项目
关键词
核电磁脉冲
辐射波模拟器
脉冲辐射天线
双指数脉冲
electromagnetic pulse（EMP）, radiating-wave simulator, impulse radiating antennas （IRA）, double exponential pulse
