Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels

P Catherwood, W scanlon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

This paper presents the results of an investigation into the effect of using co-axial cables in ultra-wideband off-body radio channel characterisation and performance evaluation for wearable antennas. Experiments were carefully designed to faithfully compare the use of a co-axial feed cable for a wearable antenna versus an optic fibre feed, and thus report on any errors introduced into the measurements due to the use of such reflective cabling. Detailed results are presented for a range of body-centric antenna positions for stationary measurements and general observations for mobile tests are also introduced and discussed. Presented results show that the use of co-axial cables has a marked effect on the radio channel characterisation, affecting received power, mean delay and delay spread results, seen to greater extent in low reflection environments and for non line of sight and highly shadowed configurations. Co-axial cable-fed antenna tests yielded greater received power than with an optic-fibre feed for a user-stationary scenario in low reflection environments. As either the line of sight component or the measurement environment’s reflectivity was increased, the difference between the two systems diminished. It was also found that the use of a co-axial cable altered the statistical fading channel model for mobile tests.
LanguageEnglish
Title of host publicationUnknown Host Publication
Pages3787-3791
Number of pages5
Publication statusPublished - 15 Apr 2011
EventAntennas and Propagation (EUCAP), Proceedings of the 5th European Conference on - Rome
Duration: 15 Apr 2011 → …

Conference

ConferenceAntennas and Propagation (EUCAP), Proceedings of the 5th European Conference on
Period15/04/11 → …

Fingerprint

Wearable antennas
Coaxial cables
Measurement errors
Antenna feeders
Fiber optics
Antennas
Telephone lines
Ultra-wideband (UWB)
Fading channels
Cables
Experiments

Keywords

  • coaxial cables
  • ultra wideband communication
  • wearable antennas
  • wireless channels
  • coaxial cabling
  • coaxial feed cable
  • measurement errors
  • off-body channels
  • optic fibre feed
  • performance evaluation
  • reflective cabling
  • statistical fading channel model
  • ultra-wideband off-body radio channel characterisation
  • wearable antenna performance
  • Antenna measurements
  • Antennas
  • Coaxial cables
  • Delay
  • Optical fiber cables
  • Optical fibers

Cite this

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title = "Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels",
abstract = "This paper presents the results of an investigation into the effect of using co-axial cables in ultra-wideband off-body radio channel characterisation and performance evaluation for wearable antennas. Experiments were carefully designed to faithfully compare the use of a co-axial feed cable for a wearable antenna versus an optic fibre feed, and thus report on any errors introduced into the measurements due to the use of such reflective cabling. Detailed results are presented for a range of body-centric antenna positions for stationary measurements and general observations for mobile tests are also introduced and discussed. Presented results show that the use of co-axial cables has a marked effect on the radio channel characterisation, affecting received power, mean delay and delay spread results, seen to greater extent in low reflection environments and for non line of sight and highly shadowed configurations. Co-axial cable-fed antenna tests yielded greater received power than with an optic-fibre feed for a user-stationary scenario in low reflection environments. As either the line of sight component or the measurement environment’s reflectivity was increased, the difference between the two systems diminished. It was also found that the use of a co-axial cable altered the statistical fading channel model for mobile tests.",
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Catherwood, P & scanlon, W 2011, Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels. in Unknown Host Publication. pp. 3787-3791, Antennas and Propagation (EUCAP), Proceedings of the 5th European Conference on, 15/04/11.

Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels. / Catherwood, P; scanlon, W.

Unknown Host Publication. 2011. p. 3787-3791.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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