Dubanton's and Wait's Approximations of the Earth Return Impedance Used for Evaluating Transmission-Line Wave Propagation Parameters

被引:3
作者
Brandao Faria, J. A. [1 ]
机构
[1] Univ Lisbon, Inst Super Tecn, Inst Telecomunicacoes, P-1049001 Lisbon, Portugal
关键词
Circular tunnels; Dubanton's approximation; overhead lines; soil return impedance; Wait's approximation; CIRCULAR TUNNEL;
D O I
10.1109/TPWRD.2015.2449758
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this letter, a new theoretical support of the well-known Dubanton's approximation widely used in the evaluation of the earth return impedance of transmission lines is provided. For that purpose, the electromagnetic-wave theory of guided cylindrical waves along an axial conductor inside a circular tunnel, developed by J. Wait, is utilized, considering that the tunnel radius is very large and that only the fundamental quasi-transverse electric-magnetic mode propagates.
引用
收藏
页码:2600 / 2601
页数:2
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