Radio-over-fibre distribution using an optical D-fibre antenna |
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Authors: | A Bhatti H S Al-Raweshidy G Murtaza |
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Institution: | a REMEC Airtech, Smeaton Close, Aylesbury, Buckinghamshire HP19 3SU, UK;b Electronic Engineering Laboratory, Communication Group, University of Kent, Canterbury, Kent CT2 2NT, UK;c Department of Engineering Technology, The Manchester Metropolitan University, John Dalton Building, Chester Street, Manchester, M1 5GD, UK |
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Abstract: | Finite element analysis has been used to characterise an all-fibre antenna using circular core D-fibre. The optical D-fibre carrying a transversely poled piezoelectric polyvinylidene fluoride polymer coating was modelled by using three-dimensional stress analysis. The response of the D-fibre antenna was determined over a wide frequency range from 1 to 800 MHz. The modelling predicts that the electric-field-induced strains will cause a phase shift of 2.43×10−5 rad/(V/m) per metre at 5 MHz. At frequencies higher than 8 MHz, the optical response is dominated by radial resonances of the D-fibre/coating composite. Using the simulation results, an electric-field-induced phase shift of 7.35×10−5 rad/(V/m) per metre has been obtained. An increase in phase modulation sensitivity by a factor of three compared to conventional circular fibre has been achieved by utilising the unique properties of the D-fibre structure. The D-fibre antenna has potential applications in areas such as EMC testing and radio-over-fibre networks where it provides a convenient means of optically generating radio signals. |
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Keywords: | D-fibre Antenna Finite element analysis |
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