| 摘要: |
| 为提高导弹强电磁脉冲防护能力，采用有限积分法对弹体内置矩形腔体的屏蔽效能
进行了数值模拟。重点分析了双层嵌套腔体屏蔽效能与单层腔体屏蔽效能之间的关系，
以及末制导雷达天线转动对壳体屏蔽效能的影响。结果表明：双层嵌套在L频段可提高屏蔽
效能3
0 dB左右，但在S频段嵌套腔体与内层腔体的屏蔽效能相当；当外层腔体与内层腔体上孔缝
共
振频率相近时，嵌套腔体屏蔽效能会急剧恶化；天线转动对屏蔽效能的影响与入射波频段相
关。该研究对提高导弹电磁防护能力具有指导意义。 |
| 关键词: 导弹系统 电磁脉冲防护 弹体 嵌套腔体 电磁耦合 有限积
分法 屏蔽效能 |
| DOI： |
|
| 基金项目: |
|
| Analysis of Shielding Effectiveness of Rectangular Cavity in Missile Enclosure |
| LI Chun-rong,WANG Xin-zheng,FENG Yan-bin |
| () |
| Abstract: |
| To harden missile system against attack of electromagnetic pulses(EMP), couplin
g processes of EMP into the nested cavity with rectangular slot are i
nvestigated. The relationship of shielding effectiveness (SE) between nested cav
ities and individual cavity is analysed. The influence of antenna′s swing on th
e SE is
taken into account. The results show that nested cavities can improve the caviti
es′ SE 30 dB in L band. But in S band SE of nested cavities is approximate to t
hat of th
e inside cavity. If the resonance frequencies of outside and inside cavities are
approximate, the SE of nested cavities will be deteriorated. The influence of a
ntenna′s swing on SE depends on the frequency of incident wave. The study is si
gnificant to improve the defense ability of missile system against EMP effects
. |
| Key words: missile system electromagnetic pulse defense missile enclosure nested cavity with slots electromagnetic coupling finite integration technique shielding effectiveness |
《电讯技术》编辑部 