作　　者： ; ; ; ;

机构地区： 哈尔滨工业大学

出　　处： 《遥测遥控》 2008年第5期14-18,共5页

摘　　要： 针对弹体上孔缝在微波脉冲作用下的耦合特性,利用电磁仿真软件CST进行分析,并研究不同孔缝形状、大小以及分布方式对耦合强度和共振频率的影响。研究结果表明,对于单个孔缝,正方形和圆形孔缝的耦合系数较为接近,且随着频率增高而增大;当入射电磁波电场方向与矩形孔缝的长边垂直时,耦合系数最大,此时将发生共振,共振频率对应的二分之一波长约等于矩形孔缝的长边长度;当入射电磁波电场方向与矩形孔缝的长边平行时,耦合系数最小。文中还进一步研究耦合系数与矩形长宽比例的关系。最后,研究组成孔缝阵列时的情况,发现各种形状的孔缝耦合系数均有明显下降,且孔缝形状差异的影响不再明显。 In this paper,coupling characteristics of different slots on the microwave pulse are studied,and simulations performed on the CST MICROWAVE STUDIO are given to verify this analysis.Basic theories of coupling slot and scale modeling are introduced.A coupling coefficient is defined to present the magnitude of the coupling characteristics for different types and sizes of apertures.The variations of coupling coefficient and coupling resonant frequency for apertures in different shapes,sizes and distributions are analyzed.It is found that for a single slot,the coupling coefficients of square and round shape slot are similar to each other and have a frequency-related fluctuating uprising tendency,when the long side of a vertical rectangle is a little smaller than the half wavelength,the coupling energy through slots can reach the maximum at the coupling resonance.The influences of the distributions of aperture arrays are also discussed and a conclusion can be drawn that for aperture arrays,the coupling coefficient is dramatically decreased for all shapes of slots,and the coupling resonant effect is restrained.

关 键 词： 微波脉冲 耦合系数 缩比 孔缝耦合

领　　域： [理学] [理学]