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Electronics 2014, 3(3), 462-473; doi:10.3390/electronics3030462

Radiation Pattern Measurement of a Low-Profile Wearable Antenna Using an Optical Fibre and a Solid Anthropomorphic Phantom

Time, Quantum and Electromagnetics Division, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
Department of Physics and Astronomy, The University of Sheffield, Western Bank, Sheffield S10 2TN, UK
Author to whom correspondence should be addressed.
Received: 28 March 2014 / Revised: 23 June 2014 / Accepted: 27 June 2014 / Published: 5 August 2014
(This article belongs to the Special Issue Wearable Electronics)
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This paper presents a study into radiation pattern measurements of an electrically small dielectric resonator antenna (DRA) operating between 2.4 and 2.5 GHz in the industrial, scientific and medical (ISM) radio band for body-centric wireless communication applications. To eliminate the distortion of the radiation pattern associated with the unwanted radiation from a metallic coaxial cable feeding the antenna we have replaced it with a fibre optic feed and an electro-optical (EO) transducer. The optical signal is then converted back to RF using an Opto-Electric Field Sensor (OEFS) system. To ensure traceable measurements of the radiation pattern performance of the wearable antenna a generic head and torso solid anthropomorphic phantom model has been employed. Furthermore, to illustrate the benefits of the method, numerical simulations of the co-polar and cross-polar H-plane radiation patterns at 2.4, 2.45, and 2.5 GHz are compared with the measured results obtained using: (i) an optical fibre; and (ii) a metallic coaxial cable. View Full-Text
Keywords: electro-optical transducer; radiation pattern; phantom; wearable antennas electro-optical transducer; radiation pattern; phantom; wearable antennas

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Loh, T.H.; Cheadle, D.; Rosenfeld, L. Radiation Pattern Measurement of a Low-Profile Wearable Antenna Using an Optical Fibre and a Solid Anthropomorphic Phantom. Electronics 2014, 3, 462-473.

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