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

P.A. Catherwood, W.G. Scanlon

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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.
Original languageEnglish
Title of host publicationProceedings of the fourth European Conference on Antennas and Propagation, EuCAP 2011
Place of PublicationUSA
PublisherIEEE Antennas & Propagation Society
Pages3787-3791
Number of pages5
ISBN (Print)978-1-4577-0250-1
Publication statusPublished - 31 May 2011
Event5th European Conference on Antennas and Propagation, EUCAP 2011 - Rome, Italy
Duration: 11 Apr 201115 Apr 2011
Conference number: 5
http://www.eucap2011.org/

Publication series

Name
PublisherIEEE Antennas & Propagation Society

Conference

Conference5th European Conference on Antennas and Propagation, EUCAP 2011
Abbreviated titleEUCAP
CountryItaly
CityRome
Period11/04/1115/04/11
Internet address

Fingerprint

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

Keywords

  • EWI-20509
  • IR-78054
  • METIS-278798

Cite this

Catherwood, P. A., & Scanlon, W. G. (2011). Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels. In Proceedings of the fourth European Conference on Antennas and Propagation, EuCAP 2011 (pp. 3787-3791). USA: IEEE Antennas & Propagation Society.
Catherwood, P.A. ; Scanlon, W.G. / Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels. Proceedings of the fourth European Conference on Antennas and Propagation, EuCAP 2011. USA : IEEE Antennas & Propagation Society, 2011. pp. 3787-3791
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Catherwood, PA & Scanlon, WG 2011, Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels. in Proceedings of the fourth European Conference on Antennas and Propagation, EuCAP 2011. IEEE Antennas & Propagation Society, USA, pp. 3787-3791, 5th European Conference on Antennas and Propagation, EUCAP 2011, Rome, Italy, 11/04/11.

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

Proceedings of the fourth European Conference on Antennas and Propagation, EuCAP 2011. USA : IEEE Antennas & Propagation Society, 2011. p. 3787-3791.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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N2 - 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 PA, Scanlon WG. Measurement errors introduced by the use of co-axial cabling in the assessment of wearable antenna performance in off-body channels. In Proceedings of the fourth European Conference on Antennas and Propagation, EuCAP 2011. USA: IEEE Antennas & Propagation Society. 2011. p. 3787-3791