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Comparison between a novel liquid switch and a GaAs MMIC switch for reconfiguring the operating frequency of a Vivaldi antenna

Borda-Fortuny, C; Tong, KF; Chetty, K; Wong, KK; (2017) Comparison between a novel liquid switch and a GaAs MMIC switch for reconfiguring the operating frequency of a Vivaldi antenna. In: Wang, V and So, K, (eds.) iWEM 2017: IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition: Proceedings. (pp. pp. 33-35). Institute of Electrical and Electronics Engineers (IEEE) Green open access

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Abstract

This article proposes a novel liquid switch to reconfigure the operating frequency of a frequency-independent antenna. A Vivaldi antenna using a low-cost GaAs MMIC RF switch is used as a landmark to compare the measured results. Two prototypes are measured in an anechoic chamber and the results have been compared. The antennas operate in two modes: low-band mode at 3 GHz with 11 dBi of gain and high-band mode operating at 4.5 GHz with a measured gain of 10.8 dBi. The reconfigurable Vivaldi antenna proposed here presents high isolation between operating bands, a minimum of 12 dB, while maintaining high gain and stable radiation pattern which is suitable for cognitive radio applications.

Type: Proceedings paper
Title: Comparison between a novel liquid switch and a GaAs MMIC switch for reconfiguring the operating frequency of a Vivaldi antenna
Event: iWEM 2017: IEEE International Workshop on Electromagnetics 2017: Applications and Student Innovation Competition, 30 May - 1 June 2017, London, UK
ISBN-13: 9781509063949
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/iWEM.2017.7968762
Publisher version: http://doi.org/10.1109/iWEM.2017.7968762
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Switches, Liquids, Vivaldi antennas, Gain, Radio frequency, Frequency measurement
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Security and Crime Science
URI: https://discovery.ucl.ac.uk/id/eprint/1558746
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