Floating Hemispherical Helical Antenna: Analysis of Gain, Efficiency and Resonant Frequency

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dc.contributor.authorLoni, Zia M.
dc.contributor.authorEspinosa, Hugo G.
dc.contributor.authorThiel, David, V
dc.coverage.issue4cs
dc.coverage.volume27cs
dc.date.accessioned2020-04-21T09:37:17Z
dc.date.available2020-04-21T09:37:17Z
dc.date.issued2018-12cs
dc.description.abstractThis paper reports the effect of seawater conductivity on gain, efficiency and resonant frequency of a hemispherical helical antenna. The size of the copper ground plane for the hemispherical antenna can be reduced using conductive seawater as part of the ground plane for the antenna. Seawater increases the gain from 6 dBi to 8 dBi but with a decreased efficiency. The simulated radiation efficiency of the antenna on water surface is 61%. Specific Absorption Rate (SAR) results show absorption of 2.19 W/kg. This paper also reports the design of a low cost floating buoy. The buoy provides a waterproof setup for the circuitry and antenna. The buoy can be effectively used for shallow water coastal monitoring.en
dc.formattextcs
dc.format.extent1006-1011cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2018 vol. 27, č. 4, s. 1006-1011. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2018.1006en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/186795
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttps://www.radioeng.cz/fulltexts/2018/18_04_1006_1011.pdfcs
dc.rightsCreative Commons Attribution 4.0 International licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectHemispherical antennaen
dc.subjectvacuum formingen
dc.subjectfloating buoyen
dc.subjectocean sensorsen
dc.subject3D printingen
dc.subjectSpecific Absorption Rate (SAR)en
dc.subjectWireless Sensor Networks (WSN).en
dc.titleFloating Hemispherical Helical Antenna: Analysis of Gain, Efficiency and Resonant Frequencyen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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