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

Electronics

Tian Hong Loh¹  David Cheadle¹ 

[1] Time, Quantum and Electromagnetics Division, National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK; E-Mail:

关键词: electro-optical transducer;    radiation pattern;    phantom;    wearable antennas;   

DOI  :  10.3390/electronics3030462

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.