圆形隧道中被导电磁波传输衰减的频率特性  

Frequency characteristic of transmitted attenuation of guided electromagnetic waves in circular tunnel

作　　者：刘会丽[1] 魏占永[2] 孙继平[3] 

机构地区：[1]河北工业大学理学院,天津300130 [2]河北工业大学电器研究所,天津300130 [3]中国矿业大学(北京)信息工程研究所

出　　处：《煤炭学报》2004年第5期630-634,共5页Journal of China Coal Society

摘　　要：给出了波导波模方程、单线波模方程和双线波模方程,并利用数值分析方法求解,得出有关结论,即单线波模由于受隧道壁影响在衰减频率特性曲线上出现了峰值点,双线波模的场基本上分布在两导线之间和周围较小的范围内,衰减率随频率单调增加.Wave guide mode equation and monofilar mode equation and bifilar mode equation were expressed, and through numerical method the solutions of mode equation were obtained. The conclusions are that attenuations frequency characteristic curves of monofilar mode has peaks point owing to loss arose by tunnel wall, and that the field of bifilar mode distributes between line and line and at the little space around the lines, attenuations rate rises monotonously with the frequency increasing.

关 键 词：圆形遂道 被导电磁波 衰减 频率特性 

分 类 号：O441.4[理学—电磁学]