• 제목/요약/키워드: Twisted conducting line

검색결과 2건 처리시간 0.016초

Investigation of Electromagnetic Field Coupling with Twisted Conducting Line by Expanded Chain Matrix

  • Cho, Yong-Sun;Ro, Jong-Suk;Chung, Yong-Seek;Cheon, Changyul;Jung, Hyun-Kyo
    • Journal of Electrical Engineering and Technology
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    • 제8권2호
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    • pp.364-370
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    • 2013
  • In the current paper, we propose a new modeling algorithm to analyze the coupling between an incident electromagnetic field (EMF) and a twisted conducting line, which is a kind of non-uniform line. Typically, analysis of external field coupling to a uniform transmission line (TL) is implemented by the Baum-Liu-Tesche (BLT) equation so that the induced load responses can be obtained. However, it is difficult to apply this method to the analysis of a twisted conducting line. To overcome this limitation, we used a chain matrix composed of ABCD parameters. The proposed algorithm expands the dimension of the previous chain matrix to consider the EMF coupling effectiveness of each twisted pair, which is then applied to multi-conductor transmission line (MTL) theory. In addition, we included a comparative study that involves the results of each method applied in the conventional BLT equation and new proposed algorithm in the uniform two-wire TL case to verify the proposed method.

FDTD Analsysis of Lightning-Induced Voltages on Shielded Telecommunication Cable with Multipoint Grounding

  • Ju, Jae-Cheol;Lee, Hyun-Young;Park, Dong-Chul;Chung, Nak-Sam
    • Journal of electromagnetic engineering and science
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    • 제1권1호
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    • pp.88-94
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    • 2001
  • In this paper, the lightning-induced voltages on shielded twisted-pair wires with multipoint grounding on cable sheath are calculated by using finite-difference time domain (FDTD) method. The equivalent single-wire line that represents a bundle of twisted-pair wires is adopted for computational efficiency. A finitely conducting ground is also taken into account in both lightning electromagnetic field calculations and surge propagation along the shielded cable for a practical simulation. It is found that multipoint additional grounding on cable sheath provides more shielding effectiveness especially in the early time response of the lightning-induced voltages. From this study, the requirements for lighting surge protection devices in a telecommunication subscriber cab1e can be established.

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