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

    Keywords

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

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