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基于IRA天线的辐射波模拟器天线辐射性能研究

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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。

Abstract：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.

作者：王赟, 陈永光, 王庆国, 范丽思,

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,

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