Liquid Metal Actuation-Based Reversible Frequency Tunable Monopole Antenna

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dc.contributor.authorKim, Daeyoungen_US
dc.contributor.authorPierce, Richard G.en_US
dc.contributor.authorHenderson, Rashaundaen_US
dc.contributor.authorDoo, Seok Jooen_US
dc.contributor.authorYoo, Koangkien_US
dc.contributor.authorLee, Jeong-Bongen_US
dc.date.accessioned2015-02-13T22:29:07Z
dc.date.available2015-02-13T22:29:07Z
dc.date.created2014-12-10
dc.description.abstractWe report the fabrication and characterization of a reversible resonant frequency tunable antenna based on liquid metal actuation. The antenna is composed of a coplanar waveguide fed monopole stub printed on a copper-clad substrate, and a tunnel-shaped microfluidic channel linked to the printed metal. The gallium-based liquid metal can be injected and withdrawn from the channel in response to an applied air pressure. The gallium-based liquid metal is treated with hydrochloric acid to eliminate the oxide layer, and associated wetting/sticking problems, that arise from exposure to an ambient air environment. Elimination of the oxide layer allows for reliable actuation and repeatable and reversible tuning. By controlling the liquid metal slug on-demand with air pressure, the liquid metal can be readily controllable to connect/disconnect to the monopole antenna so that the physical length of the antenna reversibly tunes. The corresponding reversible resonant frequency changes from 4.9 GHz to 1.1 GHz. The antenna properties based on the liquid metal actuation were characterized by measuring the reflection coefficient and agreed well with simulation results. Additionally, the corresponding time-lapse images of controlling liquid metal in the channel were studied.en_US
dc.description.sponsorshipKorean Ministry of Knowledge Economy, Brain Scouring Program (HB606-12-2001)en_US
dc.identifier.citationKim, Daeyoung, Richard G. Pierce, Rashaunda Henderson, Seok Joo Doo, et al. 2014. "Liquid metal actuation-based reversible frequency tunable monopole antenna." Applied Physics Letters 105(23): 234104.en_US
dc.identifier.issn0003-6951en_US
dc.identifier.issue23en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4320
dc.identifier.volume105en_US
dc.language.isoenen_US
dc.publisherAmer Inst Physicsen_US
dc.relation.urihttp://dx.doi.org/10.1063/1.4903882en_US
dc.rights©2014 AIP Publishing LLCen_US
dc.source.journalApplied Physics Lettersen_US
dc.subjectLiquid metalsen_US
dc.subjectMonopole antennasen_US
dc.subjectHydrochloric aciden_US
dc.subjectGalliumen_US
dc.subjectCopperen_US
dc.titleLiquid Metal Actuation-Based Reversible Frequency Tunable Monopole Antennaen_US
dc.type.genrearticleen_US

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