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dc.contributor.advisorAdler, Richard W.
dc.contributor.authorTurkes, Gurkan.
dc.dateMarch 1990
dc.date.accessioned2013-11-20T23:33:41Z
dc.date.available2013-11-20T23:33:41Z
dc.date.issued1990-03
dc.identifier.urihttp://hdl.handle.net/10945/37554
dc.descriptionApproved for public release, distribution is unlimited.en_US
dc.description.abstractThis thesis investigates the performance of various configurations of tactical High Frequency (HF) field deployable antennas in the presence of lossy earth. Antennas investigated include horizontal dipoles, short sloping wires, inverted vees, and monopoles with buried and elevated radials. Numerical models of the antennas are exercised via the Numerical Electromagnetic Code (NEC) for radiation pattern performance. Antennas are analyzed for applicability to (1) short-range Near Vertical Incident Skywave (NVIS), where high elevation radiation angles are required, (2) medium- and long-range low radiation angle use, and (3) vertically polarized low-angle radiation for ground wave communication. Good NVIS and ground wave performance occurs for horizontal dipoles. Sloping wires and sloping dipoles are similar to horizontal dipoles but exhibit a moderate amount of azimuth plane directivity. Vertical monopoles with at least 15 buried radials produce medium- and long-range skyware coverage and good ground wave performance. Four elevated radials for quarter-wavelength monopoles are shown to out-perform 15 buried radials and are much easier to erect. The larger and more difficult-to-erect inverted vee dipole slightly outperforms a monopole by virtue of modest azimuth plane directivity. The results of this study can be included in an antenna engineering handbook and can be used to interface with existing ionospheric propagation codes in order to obtain optimum communication effectiveness.en_US
dc.description.urihttp://archive.org/details/tacticalhffielde1094537554
dc.format.extentiv, 53 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsCopyright is reserved for the copyright owner.en_US
dc.subject.lcshComputer simulationen_US
dc.titleTactical HF field expedient antenna performance Volume IIen_US
dc.typeThesisen_US
dc.contributor.secondreaderJauregui, Stephen.
dc.contributor.corporateNaval Postgraduate School (U.S.)
dc.contributor.departmentDepartment of Electrical and Computer Engineering
dc.subject.authorComputer Simulationen_US
dc.subject.authorNumerical Electromagnetics Code (NEC)en_US
dc.subject.authorTactical HF Field Antennasen_US
dc.description.serviceLieutenant Junior Grade, Turkish Navyen_US
etd.thesisdegree.nameM.S. in Electrical Engineeringen_US
etd.thesisdegree.levelMastersen_US
etd.thesisdegree.disciplineElectrical Engineeringen_US
etd.thesisdegree.grantorNaval Postgraduate Schoolen_US


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