标签: 阵辅

缝隙阵辅助7.2.3WaveguideslotarraydesignAsketchofawaveguideslotantennawiththepertinentdimensionsisshowninFigure7-5.Thefirstdesignconsiderationisthattheslotsberesonantsothattheyprovidearesistiveloadtothe(waveguide)transmissionline.Normally,itisdesirableforanomnidirectionalantennatoradiateinahorizontal(azimuth)plane.Thisisachievedbyfeedingalltheslotsinphase.Theradiationpatternmaybetiltedupwardordownward(visualizeashallowcone)bychangingthephasingoftheslots,ifdesired.I’mtoldthatverticalcollineararraysforground-basedaviationantennasaresometimesdesignedwithapatterntiltedupward.Theslotsarefedinphasebyspacingtheircentersatelectricalhalf-wavelengthintervalsalongthewaveguide.Theelectr……