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《Journal of China Coal Society》 2003-02
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Study on cut-off frequency of abnormity wave-guide

SUN Jiping,ZHANG Changsen(InfoResearch Institute, Beijing Campus, China University of Mining and Technology,Beijing100083, China)  
The changing characteristic of cutoff frequency in abnormity waveguide that is formed from the basic shape of trapezium, semicircle arch, rectangle and hexagon is studied by using finite element method in this paper A conclusion is drawn out that cutoff frequency will decrease linearly with the increasing of crosssection girth of waveguide and using leasttwomultiplication method we also draw out the similar changing curve between them The result has an important reference meaning to wireless communication in finite space of railwaytunnel, mine well tunnel
【CateGory Index】: TD655
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1 Sun Ji-ping Zhang Chuan-lei (The Institute of Information Engineering, China University of Mining&Technology, Beijing 100083, China);Effects of Cross Section Dimensions on Propagation Characteristics in Trapezoid Tunnel[J];Journal of Electronics & Information Technology;2006-08
2 YANG Wei~(1,2), FENG Xi-sheng~(1), CHENG Shi-xin~(2), SUN Ji-ping~(3) Network, Ministry of Education, Beijing Jiaotong University, Beijing100044, China; 2.National Mobile Communications Research Laboratory, Southeast University, Nanjing210096, China; 3.Info.Research Institute, China University of Mining and Technology(Beijing), Beijing100083, China);The theories and key technologies for the new generation mine wireless information system[J];Journal of China Coal Society;2004-04
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4 ZHAO Jing(Anhui University of Architecture,Hefei 230000,China);Study of Electro-magnetic Wave's Transmissive Characteristics in Mine Gateway Base on ANSYS[J];Colliery Mechanical & Electrical Technology;2009-05
5 LIU Ling-li,ZHENG Qin-hong,YAO Bin,SHUAI Chun-jiang,ZHANG Xue-qing(School of Physics and Electronic Information,Yunnan Normal University,Kunming 650092,China);Transmission characteristic of electromagnetic wave in the train-tunnel by finite difference method[J];Journal of Yunnan Normal University(Natural Sciences Edition);2006-03
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1 SUN Ji-ping SHI Qing-dong (Research Institute of Information Engineering , China Univ. of Mining and Technology, Beijing Campus, Beijing 100083, China);Effects of trains on cutoff frequency in rectangular tunnel[J];Chinese Journal of Radio Science;2001-01
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5 SUN Ji-ping~1 CHENG Ling-fei~1,2(1. Institute of Information Engineering, China University of Mining and Technology, Beijing 100083, China;2. Department of Electrical Engineering, Henan Polytechnic University,Jiaozuo Henan 454100, China);Analysis of electromagnetic wave propagation modes in rectangular tunnel[J];Chinese Journal of Radio Science;2005-04
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7 HUANG Hui,WANG Yi (Department of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China);Application of ANSYS in Electromagnetic Field Teaching[J];Journal of Electrical & Electronic Engineering Education;2005-04
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