高速防空导弹头部等离子体对射频信号传输的影响  

Transmission of RF Signal Affected by Plasma Round Its Head of High Speed Air Defence Missile

作　　者：马丽华[1] 朱可炎[1] 

机构地区：[1]北京电子工程总体研究所,北京100854

出　　处：《现代防御技术》2010年第1期18-22,共5页Modern Defence Technology

摘　　要：高速防空导弹在大气中飞行时,由于高温电离会在其头部形成一层等离子体外壳,它将影响寻的导引头天线输入、输出射频信号的传输。分析计算了等离子体对射频信号的衰减、折射和反射。结果表明,在某些情况下衰减不能忽略,S,C,X,Ku之间折射系数的差别是很小的,而反射系数则随频率增加有较明显的增大。这些结果为导引头频段的选择及防空导弹弹道的设计提供了重要依据。A plasma outer cover on the nose of high speed air defence missile will be formed when flying in atmosphere due to the ionization of high temperature air round the missile. This plasma outer cover will influence the transmission of RF input and output signal of the antenna in its home radome And the attenuation,refractivity and reflectivity of the plasma for the RF signal are analyzed and ealculated. It shows that the attenuation cant be neglected in certain case. Although there are little differences of refractivity between S, C,X,Ku bands, the reflectivity is rather obviously increased as frequency increases, which provides an important basis for selecting frequency band of seeker and ballistic design of air defence missile.

关 键 词：射频传输 等离子体外壳 防空导弹 

分 类 号：TJ761.13[兵器科学与技术—武器系统与运用工程] TN82[电子电信—信息与通信工程]