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

Catherwood, P and 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: Antennas and Propagation (EUCAP), Proceedings of the 5th European Conference on, Rome. EuCAP. 5 pp. [Conference contribution]

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URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5782393&isnumber=5780481

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.

Item Type:Conference contribution (Paper)
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
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:30499
Deposited By: Dr Philip Catherwood
Deposited On:18 Nov 2014 10:33
Last Modified:18 Nov 2014 10:33

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