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Backscattering in Twisted-Pair Nonhomogeneous Transmission Lines

Fertner, Antoni LU ; Ericson, Klas; Borjesson, Per Ola LU ; Berg, Miguel LU ; Cederholm, Daniel; Odling, Per LU ; Lindqvist, Fredrik LU ; Magesacher, Thomas LU ; Medeiros, Eduardo LU and Huang, Yezi LU (2018) In IEEE Transactions on Microwave Theory and Techniques 66(6). p.2674-2682
Abstract

The development of the communication networks tends gradually toward exploiting higher frequencies, sometimes even reaching the lowest microwave band (P-band). As the signal bandwidth used for transmission over twisted-pairs increases, as recommended by G.fast and other broadband systems, new phenomenon was observed, namely, backscattering. Motivated by the measurements of copper cables in frequency band up to 400 MHz, we propose a novel backscattering model. It may be productively applied to the problem of loop diagnostics. The methods to accurately and reliable determine the relevant transmission-line parameters are sine qua non condition to appropriately exploit the potential of short-to-medium range access lines. In this paper, a... (More)

The development of the communication networks tends gradually toward exploiting higher frequencies, sometimes even reaching the lowest microwave band (P-band). As the signal bandwidth used for transmission over twisted-pairs increases, as recommended by G.fast and other broadband systems, new phenomenon was observed, namely, backscattering. Motivated by the measurements of copper cables in frequency band up to 400 MHz, we propose a novel backscattering model. It may be productively applied to the problem of loop diagnostics. The methods to accurately and reliable determine the relevant transmission-line parameters are sine qua non condition to appropriately exploit the potential of short-to-medium range access lines. In this paper, a recursive formulation of the frequency-domain response of the backscattering is used for a space-time characterization. To confirm the practical use of the finding, we evaluate the properties of a loop using wideband, high-frequency S₁₁ measurements of the real cables. These laboratory results confirm the effectiveness and accuracy of the proposed method.

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organization
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type
Contribution to journal
publication status
published
subject
keywords
Backscatter, Backscattering, Bandwidth, electromagnetic modeling, Frequency measurement, Impedance, instrumentation and measurement techniques, nonuniform transmission lines, Power cables, propagation in complex media, Signal resolution, single-ended line test (SELT), time-domain reflectometry (TDR), Topology, transmission-line theory
in
IEEE Transactions on Microwave Theory and Techniques
volume
66
issue
6
pages
2674 - 2682
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85045326195
ISSN
0018-9480
DOI
10.1109/TMTT.2018.2818699
language
English
LU publication?
yes
id
d76a7450-16a1-40bb-a98a-b40669e4a478
date added to LUP
2018-04-25 16:51:19
date last changed
2019-01-14 15:07:50
@article{d76a7450-16a1-40bb-a98a-b40669e4a478,
  abstract     = {<p>The development of the communication networks tends gradually toward exploiting higher frequencies, sometimes even reaching the lowest microwave band (P-band). As the signal bandwidth used for transmission over twisted-pairs increases, as recommended by G.fast and other broadband systems, new phenomenon was observed, namely, backscattering. Motivated by the measurements of copper cables in frequency band up to 400 MHz, we propose a novel backscattering model. It may be productively applied to the problem of loop diagnostics. The methods to accurately and reliable determine the relevant transmission-line parameters are sine qua non condition to appropriately exploit the potential of short-to-medium range access lines. In this paper, a recursive formulation of the frequency-domain response of the backscattering is used for a space-time characterization. To confirm the practical use of the finding, we evaluate the properties of a loop using wideband, high-frequency S&amp;#x2081;&amp;#x2081; measurements of the real cables. These laboratory results confirm the effectiveness and accuracy of the proposed method.</p>},
  author       = {Fertner, Antoni and Ericson, Klas and Borjesson, Per Ola and Berg, Miguel and Cederholm, Daniel and Odling, Per and Lindqvist, Fredrik and Magesacher, Thomas and Medeiros, Eduardo and Huang, Yezi},
  issn         = {0018-9480},
  keyword      = {Backscatter,Backscattering,Bandwidth,electromagnetic modeling,Frequency measurement,Impedance,instrumentation and measurement techniques,nonuniform transmission lines,Power cables,propagation in complex media,Signal resolution,single-ended line test (SELT),time-domain reflectometry (TDR),Topology,transmission-line theory},
  language     = {eng},
  month        = {04},
  number       = {6},
  pages        = {2674--2682},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Microwave Theory and Techniques},
  title        = {Backscattering in Twisted-Pair Nonhomogeneous Transmission Lines},
  url          = {http://dx.doi.org/10.1109/TMTT.2018.2818699},
  volume       = {66},
  year         = {2018},
}