Calculation of per-unit-length parameters for shielded and unshielded twisted pair cables

Hassoun, Fahd; Tarafi, R.; Zeddam, A.

doi:10.1109/emczur.2006.214917

Cited by 9 publications

(3 citation statements)

References 5 publications

(6 reference statements)

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“…In this area, the research carried out in [18] proves that an increase in the insulation thickness of the twisted pair conductors ensures the attenuation coefficient of shielded cables in the range of normalized values. At the same time, the authors showed [9] that an increase in insulation thickness by 50 % leads to a decrease in capacitance by 20 % with a simultaneous increase in the mass and dimensions of the twisted pair.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Constructing a model of the influence of structural and technological inhomogeneities on electromagnetic energy losses in cables based on a twisted pair

Bezprozvannych

Pushkar

2023

EEJET

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The objects of research reported here were cables based on twisted pairs of various designs. The issue of the emergence of additional losses of electromagnetic energy is related to structural and technological inhomogeneities at the technological stage of cable production. The influence of the working capacitance of the twisted pair on the energy losses in the cables has been substantiated. A methodology was proposed for the numerical calculation of the electric field under the condition of ellipticity of the structural elements of the twisted pair. That has made it possible to determine the distortion of the electric field and the effect of inhomogeneities on the working capacitance of a twisted pair of different designs. Specifically, it was shown that for shielded structures with continuous polymer insulation, the distortion of the electric field and the growth of the working capacitance are observed to a greater extent. The need to find technological solutions to reduce the effect of screen ellipticity on cable capacitance has been emphasized. The effectiveness of capacitance regulation in the presence of inhomogeneities has been confirmed, by using foamed insulation to reduce the loss of electromagnetic energy in the cable. The effect of reducing the working capacitance and increasing additional losses under the simultaneous influence of the ellipticity of the electrical insulation and the protective polymer shell has been established, which necessitates the technological process adjustment in the manufacture of twisted pair. An applied aspect of using the results is the possibility of improving the typical technological process of manufacturing twisted pairs to reduce additional losses of electromagnetic energy at the final technological stage of cable production. The adequacy of the numerical studies was confirmed by experimental dependences of the attenuation coefficient and additional energy losses of the unshielded cable in the frequency range up to 100 MHz

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Constructing a model of the influence of structural and technological inhomogeneities on electromagnetic energy losses in cables based on a twisted pair

Bezprozvannych

Pushkar

2023

EEJET

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“…The formalism is based on the non-uniform transmission line theory, where the P.U.L. parameters vary according to the geometry of the line [7,8]. The transmission line equations can be derived from the integral or differential Maxwell's equations.…”

Section: Theoretical Approachmentioning

confidence: 99%

Analysis of the Radiation from a Complex Multi-Conductor Transmission Line

Hasson¹,

Bousaleh²,

Chehade³

2010

REPQJ

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The Deployment of Power Line Transmission (PLT) and the development of new broadband services over the telephone network through technology like xDSL (x Digital Subscriber Line), requires higher data rates, consequently higher bandwidths, and operating frequencies. So it is generally accompanied with electromagnetic compatibility (EMC) phenomena, in particular the radiated emissions associated to the deployed system and used cables characteristics. In fact the electrical cable presents variations in their geometry, causing an increase in the electromagnetic radiation. This paper presents a theoretical approach to study a complex transmission line network over ground plane. This approach leads to an analytical expression for the evaluation of P.U.L. parameters of finite length twisted wires lines. These expressions give the capacitances and the inductances values in every point of the cable, the theoretical results are compared to measurements. The formalism is also derived to determine the distribution of the electromagnetic field radiated by Shielded or Unshielded Twisted Pair cables with discontinuity. The obtained results are compared to those provided by a code based on the antenna theory.

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“…In the second case, the magnetic flux and electric charges must be computed [5,6]. Using Maxwell's equations, the electric field can be derived using the scalar potential and the potential vector:…”

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confidence: 99%

New method for analyzing the quality of a telephone network

Bousaleh

Hassoun

Jammal³

2010

Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference

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The development of new broadband services over the telephone network requires a good quality of the installation.An important parameter that verifies the quality of a telephone installation system is the symmetry of the line. A measure of the symmetry, made from the telephone exchange center, does not allow remote observation of asymmetry on the client telephone installation.To address this problem, a new method for analyzing the quality of the pair is proposed in this paper. This method consists of evaluating the symmetry of the line by a LF (low frequency) measure made from the telephone exchange side.The aim of this study is to verify the feasibility and the validity of this technique, by a theoretical approach. We have developed a simulation code based on the theory of multi-wire transmission lines, associated with a topological approach. The model and the code are validated using experimental measurements.In the following, we exploit the simulation tool to evaluate this new measurement technique.A second axis of the study was to search for a correlation between the values of LF symmetry evaluated from the telephone exchange side and the values of HF symmetry evaluated at client side.Keywords. quality of a telephone system, symmetry of the cable, multi-wire transmission lines, Defects, ADSL

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Calculation of per-unit-length parameters for shielded and unshielded twisted pair cables

Cited by 9 publications

References 5 publications

Constructing a model of the influence of structural and technological inhomogeneities on electromagnetic energy losses in cables based on a twisted pair

Constructing a model of the influence of structural and technological inhomogeneities on electromagnetic energy losses in cables based on a twisted pair

Analysis of the Radiation from a Complex Multi-Conductor Transmission Line

New method for analyzing the quality of a telephone network

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