摘要
运用时域有限差分法(FDTD),计算和分析了E面扇形喇叭天线对超宽带(UWB)电磁脉冲、高空核爆电磁脉冲(HEMP)和高功率微波(HPM)的响应特性,并且通过瞬态近远场变换计算了天线对入射脉冲产生的远区场响应,并利用傅里叶变换得到了响应频谱.经分析得出入射脉冲不但会对天线的连接设备造成损伤,而且由于E面扇形喇叭天线所具有的高增益特性,使得进入天线口径后产生反射的电磁脉冲幅值被增大,在远区场形成较大场强,从而将会对接收设备造成物理损伤.
The response of E-plane horn antenna to the ultra wide band （UWB） electromagnetic pulse, high-altitude electromagnetic pulse （HEMP）, and high power microwave （HPM） is calculated and analyzed based on the finite-difference time-domain method （FDTD）. The antenna＇s far-field response is also calculated through transient near-far field transformation, and response spectrum is obtained by using Fourier transform. After analysis, it can be derived that incident pulse can damage the antenna connection device. Besides, contributing to the high power gain characteristic of E-plane horn antenna, the electromagnetic pulse＇s magnitude is amplified after entering the antenna＇s opening, forming a stronger field in the far field, and thereby causing physical damage to the receiving device.
出处
《应用科技》
CAS
2012年第1期21-25,共5页
Applied Science and Technology
关键词
时域有限差分法
瞬态近远场变换
电磁脉冲
E面扇形喇叭天线
FDTD
transient near-far field transformation
electromagnetic pulse
E-plane sectoral horn antenna
