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dc.contributor.advisorJenn, David C.
dc.contributor.authorEngle, Stanley E.
dc.dateMarch 1992
dc.date.accessioned2012-11-29T16:15:20Z
dc.date.available2012-11-29T16:15:20Z
dc.date.issued1992-03
dc.identifier.urihttp://hdl.handle.net/10945/23765
dc.description.abstractThe performance of a phased array antenna depends upon the phase and amplitude distribution across the aperture. A continuous 13-near phase distribution is required for an efficient focussed beam, but practical phase shifters are digital devices and can only provide an approximation to a linear phase distribution. Consequently some type of roundoff criteria must be established. The method of roundoff affects the radiation pattern characteristics such as beam location and sidelobe level. Accurate target tracking requires that a radar have a small beam pointing error. Low sidelobes are also desirable to prevent jamming and the illumination of clutter. Therefore the goal was to select a roundoff criterion that provides a phase distribution across the aperture to minimize both the beam shift and the sidelobe levels, while simultaneously maximizing the gain. The methods examined are referred to regular roundoff, weighted random roundoff, running sum roundoff and symmetric running sum roundoff. The first two are in common use, but the third and fourth are new methods examined in this paper. It was demonstrated that the latter two have the beam shift of the four roundoff methods, without significantly degrading the other pattern properties.en_US
dc.description.urihttp://archive.org/details/roundofflgorithm1094523765
dc.format.extent142 p.en_US
dc.language.isoen_US
dc.publisherMonterey, California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.subject.lcshPhased array antennasen_US
dc.titleRoundoff algorithms for digital phase shifters that minimize beam shiften_US
dc.typeThesisen_US
dc.contributor.secondreaderRood, Homer J.
dc.contributor.corporateNaval Postgraduate School
dc.contributor.departmentDepartment of Electrical and Computer Engineering
dc.subject.authorRoundoffen_US
dc.subject.authorBeam shiften_US
dc.subject.authorPhase shiftersen_US
dc.subject.authorBitsizeen_US
dc.subject.authorPointing erroren_US
dc.subject.authorNull depthen_US
dc.subject.authorSidelobeen_US
dc.description.serviceLieutenant, United States 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
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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