Borda Fortuny, CristinaTong, Kin-FaiChetty, KevinWong, Kai-Kit2018-12-172018-12-172017Borda-Fortuny C, Tong KF, Chetty K, Wong KK. Comparison between a novel liquid switch and a GaAs MMIC switch for reconfiguring the operating frequency of a Vivaldi antenna. In: Wang V, So KK. 2017 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM); 2017 May 30 - Jun 1; London, England. [New York]: IEEE; 2017. p. 33-5. DOI: 10.1109/iWEM.2017.7968762978-1-5090-6392-5http://hdl.handle.net/10230/36129Comunicació presentada a: International Workshop on Electromagnetics: applications and student innovation competition (iWEM), celebrada del 30 de maig a l'1 de juny de 2017 a Londres, Anglaterra.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.application/pdfeng© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final published article can be found at https://ieeexplore.ieee.org/document/7968762/info:eu-repo/semantics/conferenceObjecthttp://dx.doi.org/10.1109/iWEM.2017.7968762SwitchesLiquidsVivaldi antennasGainRadio frequencyFrequency measurementinfo:eu-repo/semantics/openAccess