梯形隧道中橫截面尺寸對(duì)電磁波傳播特性的影響
Effects of Cross Section Dimensions on Propagation Characteristics in Trapezoid Tunnel
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摘要: 采用有限元法分析了梯形隧道中橫截面尺寸對(duì)傳輸特性的影響。分別對(duì)梯形隧道上邊寬度、下邊寬度和高度尺寸的變化對(duì)主模和最低次高階模截止頻率及通信帶寬的影響進(jìn)行了研究，并得出結(jié)論：梯形隧道中上邊寬度、下邊寬度和高度的增大會(huì)使隧道中電磁波截止頻率降低；在隧道下邊寬度增加或者隧道高度減小的情況下會(huì)得到較大的通信帶寬。
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關(guān)鍵詞:
- 梯形隧道;有限元;截止頻率;通信帶寬
Abstract: The effect of cross section dimension on propagation characteristics in trapezoid tunnel is analyzed using finite element method. By varying the dimension of top side, bottom side, height, the cutoff frequency for dominant mode and the mode next to dominant and bandwidth in trapezoid tunnel are studied respectively. It comes to a useful conclusion that the increasing of top side, bottom side, height decrease the cutoff frequency and longer bottom side or lower height result in larger bandwidth. -
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