微带天线对高功率电磁脉冲响应的时域分析

微带天线对高功率电磁脉冲响应的时域分析

内容简介：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。

Abstract：In order to study the effect of electro-magnetic pulse to microstrip antenna,based on the finite difference time domain method, a conductor edge singularity treatment technology is proposed by introducing the conductor edge field distribution function, which ensures accuracy of the computations on the condition of not reducing com-putational efficiency. Then the response of the microstrip antenna to a high power electromagnetic pulse is obtained. The calculation results show that the incident high-power pulse in the microstrip antenna is not only excited by the main mode of the antenna, but is also excited by some higher order modes. With the increase of the angle between the incident pulse wave vector in the xoy plane projection and the positive x axis, all the response voltages are less than 10 V in the time domain, and the higher order mode decreases gradually in the frequency domain. The spec-trum distribution is mostly focused on the resonance frequency of the main mode of the antenna. With the increase of the angle between the incident pulse wave vector and the z axis, the response voltage decreases gradually in the time domain while the high order mode increases gradually in the frequency domain. The spectrum distribution gradually transfers to the resonant frequency band of the high order mode.

作者：李磊, 张昕,

关键词：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,