E面扇形喇叭天线对电磁脉冲响应特性的分析  

Response characteristics of E-plane sectoral horn antenna excited by electromagnetic pulses

作　　者：曹磊[1] 张昕[1] 李磊[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2012年第1期21-25,共5页Applied Science and Technology

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.

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 

分 类 号：TN015[电子电信—物理电子学]