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微带天线对高功率电磁脉冲响应的时域分析

DOI: 10.3969/j.issn.1006-7043.201306043

Keywords: 微带天线, 高功率电磁脉冲, 时域有限差分法, 渐变非均匀网格, 导体边缘奇异性处理, 时域分析

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Abstract:

为了研究电磁脉冲对微带天线的影响,在时域有限差分法基础上,引入导体边缘场分布函数,提出了一种导体边缘奇异性处理技术。该技术在不降低计算效率的情况下,保证了计算精度,得到了高功率电磁脉冲辐照下微带天线的响应。计算结果表明:入射高功率脉冲在微带天线内不但激励起天线的主模,还激励起一些高次模:随着入射脉冲在xoy面的投影与正x轴夹角的增大,时域上,响应电压均小于10 V,频域上,高次模逐渐减小,其频谱分布更集中于天线主模的谐振频率;随着入射脉冲与正z轴夹角的增大,时域上,响应电压逐渐减小,频域上,高次模逐渐增大,其频谱分布逐渐分散于高次模对应的谐振频率频段。

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