超宽带双脉冲辐射天线
Ultrawide band dual-pulse radiating antenna
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摘要: 研究了一种高功率超宽带双脉冲辐射天线，其设计思想为：辐射天线辐射两路不同脉宽的超宽谱电磁脉冲，且两路脉冲在时间上有一定延时，从而达到拓宽辐射场频谱宽度的目的。设计了一种采用三馈源的半抛物反射面超宽带天线，并对其进行了数值模拟与实验研究。采用短时傅里叶变换对辐射组合脉冲进行了联合时频分析，结果表明该天线能有效辐射双路不同脉宽的超宽谱脉冲，双脉冲辐射场的频谱宽度比单脉冲辐射场有了明显的拓宽，验证了采用双脉冲辐射是拓宽辐射场频谱的有效方法。Abstract: A method to widen the microwave spectrum with radiating dual-pulse is presented. Based upon this method, a high power ultrawide band dual-pulse radiating antenna is developed. The antenna consists of a half-paraboloidal reflector, a ground plane, and three TEM horn feeds. Simulation analysis and experiments on the antenna are taken. Short-time Fourier transform (STFT) have been conducted to assist with the characterization of the combined pulses. Results show that the combined radiation pulses more effective to widen the microwave spectrum than a single radiation pulse.
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