摘要
研究了微带线间隙填充均匀等离子体层对电磁波传输的影响.得到了在大小两种间隙下等离子体频率(密度)、电子碰撞频率、等离子体厚度和宽度等参数与电磁波传输效率的关系.仿真结果表明,对给定微带间隙,较高频率电磁波将无损或低损通过间隙,而较低频率电磁波被截止.填充一定密度等离子体后,被截止的低频电磁波可以通过间隙,其传输效率随等离子体密度(频率)增大而增大,随碰撞频率增大而减小,而且间隙等离子体应具有适当的宽度和厚度.等离子体在高频段产生一个衰减峰,其位置与等离子体频率成正比,但与碰撞频率无关.利用等离子体可以控制微带线上电磁波的传输.
The effect of uniform plasma on the electromagnetic wave（EMW） transmittance on micro-strip line is investigated by simulations.The dependence of transmission coefficients of EMW on the plasma frequency（density）,the electron-molecule collision frequency,the thickness and width of the plasma layer etc are obtained under large and small gaps on the line.The results show that before filled with plasma in the gap,EMW with higher frequency can pass the gap while that with lower frequency cut off.After filled with dense plasma layer of appropriate thickness and width,the gap allows the low-frequency EMW to transfer.The transmittance increases with the plasma frequency,but decreases with the collision frequency.On the other hand,the filled plasma causes an attenuation peak at high-frequency band with position being proportional to the plasma frequency but independent on the collision frequency.The discharge plasma is feasible to be used to control the EMW transmission on the micro-strip lines.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2009年第10期932-935,共4页
Transactions of Beijing Institute of Technology
基金
国家"八六三"计划项目(2007AA01Z276)
关键词
等离子体
微带
电磁波
传输特性
plasma
micro-strip
electromagnetic wave
transmission characteristic
