Antenna-Magus-Newsletter4-4 英文文献资料

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1、Newsletter4.4July2013AntennaMagusversion4.4released!WearepleasedtoannouncethenewreleaseofAntennaMagusVersionThearraysynthesistoolhasalsobeenextendedtoincludetheeffects4.4.Thisreleaseseestheadditionof5newantennas:ofareflectivegroundplanewhencalculatingtheradiationpatternof•Horn-fedtruncatedrefle

2、ctorantennaasynthesizedarray.•Shunt-fedslantedV-dipolepair•OffsetPattern-fedCassegrainreflectorantenna•Monopoledielectricresonatorantenna•BifilarhelixantennaArraysynthesisreflectivegroundplaneadditionAnewadditiontothearraysynthesistoolistheoptionofincludingtheeffectofareflectivegroundintheradia

3、tionpatterncalculation.Thisfeatureisespeciallyusefulwheremeasuredorsimulatedsingle-elementpatterndataisavailable,whiletheelementswillbeoperatingoveralargegroundplaneorclosetoalargeconductingstructureinthearrayenvironment.Thepatterndatacanbeimportedandpositionedacertaindistanceawayfromareflectiv

4、egroundplaneandtheresultantradiationpatternsynthesisedwithinafewseconds.Belowisanexampleofa4x9planardipolearrayshowingthelayoutandsynthesisedradiationpatternsincludingandexcludingareflectivegroundplane.Planar4x9arraysynthesisexampleexcludingthereflectivegroundplane.Planar4x9arraysynthesisexampl

5、eincludingareflectivegroundplaneatz=-0.25λ.Explore.Design.Deliver.NewantennasinVersion4.4TruncatedreflectorComparingthree3dBH-planebeamwidthdesigns:(a)2°,(b)3.5°and(c)5°.Truncatedversionsoftheparabolicreflectormaybetermed‘shaped-beamparabolicantennas’andhavetheadvantagethattheymaybedesignedfors

6、pecific(anddifferent)EandHbeamwidths.Thisisusefulinsystemssuchasmechanicallyscannedsearchradars,airportsurveillanceradars,airtrafficcontrolradarsandmilitaryheightfinderradars-wherefanbeamradiationpatternsarerequired.Zoomedpatterncutsforthree3dBH-planebeamwidthdesigns:(a)2°,(b)3.5°and(c)5°.Inord

7、ertorealiseafanbeam,thereflectoristruncated(eithercut-offhorizontally,orusinganellipticalintersection)andfedbyanon-axissectoralhornantenna.Theantennaisusuallyfocusedexperimentallybyfindingtheoptimalaxialposition(andtransverseposit