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机构地区:[1]电子工程学院脉冲功率激光技术国家重点实验室,合肥230037
出 处:《真空科学与技术学报》2017年第3期277-280,共4页Chinese Journal of Vacuum Science and Technology
摘 要:等离子体对电磁波会产生反射,利用矢量网络分析仪设计了微波反射测试系统,研究了电磁波正入射等离子体阵列时,电磁波极化方向、电子密度、柱间距等因素对电磁波反射的影响。结果表明本文设计的等离子体阵列与电磁波相互作用时,对2~9 GHz电磁波反射效果较为明显,对9~18 GHz电磁波衰减效果较为明显,对TM波的反射大于TE波,同时增大等离子体电子密度、减小柱间距均可使反射增强。Here,we experimentally addressed the reflection of a normally incident electromagnetic( EM) wave from a lab-built plasma tube array. The influence of the realistic situation,including but not limited to the EM polarization vector,electron density in and column spacing of the plasma tube array,on the reflection was qualitatively investigated with a vector network analyzer. The results show that the EM polarization vector,EM frequency,electron density and column spacing all have a major impact on the reflection. To be specific,the plasma tube array strongly reflected EM wave in 2 - 9 GHz range but significantly attenuated the EM wave in 9 - 18 GHz range; and the reflection of TM mode was observed to be stronger than that of TE mode. In addition,a simultaneous increase of the electron density and a decrease of the column spacing enhanced the reflection.
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