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

Borda Fortuny, Cristina; Tong, Kin-Fai; Chetty, Kevin; Wong, Kai-Kit

doi:http://dx.doi.org/10.1109/iWEM.2017.7968762

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

Citation

Borda-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.2017.7968762

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.

Description

Comunicació 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.