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

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

1
Time, Quantum and Electromagnetics Division, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
2
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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Abstract

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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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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