摘要
线极化波与腔体的耦合效果受腔体上窄缝方向的影响很大,而圆极化波与腔体的耦合对窄缝方向的依赖比较小。利用时域有限差分法,采用相同振幅的线极化波和圆极化波入射,分别计算它们与开有单缝和T形缝隙的屏蔽腔体的孔缝耦合效应。比较两种极化形式的波入射时,耦合到腔体内部功率密度最大值随极化方向的变化关系,从而得出结论:同幅度的圆极化波比线极化波更容易耦合进入腔体,并不易受缝隙形状影响。
The coupling power greatly depends on the slots＇ direction of a cavity for the linearly polarized wave incidence, but weakly depends for the circularly polarized wave. The coupling characteristics of cavity with single and T- shape slot are simulated for the above two kinds of waves incidence by using the finite - difference time - domain method. By comparing the waveforms of the coupling power density＇s maximum changed with polarization direction,the conclusion is obtained that circularly polarized wave can couple into cavity more easily than linearly polarized wave which have the same amplitude, and the shape of slots have little influence on circularly polarized wavers coupling.
出处
《现代电子技术》
2010年第3期37-39,共3页
Modern Electronics Technique
关键词
时域有限差分
圆极化
线极化
孔缝耦合
finite- difference time- domain
circularly polarized wave
linearly polarized wave
slot coupling
