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1 Introduction Incommunicationsystemapplications ,microstripantennashaveattractedmuchinterestduetotheirlightweightandlowcost.Possibledesignsfordual frequencymicrostripantennasincludedual modedual frequencypatchantennas,multi patchstructuresandreactively loadedpatchantennas,etc[1,5] .Theor thogonal modedual frequencypatchantennasprovidenosimilarradiatingpatternsofthetwooperatingfre quencies .Themulti patchstructureaddstothecom plexityinboththeoreticalanalysisandmanufacturing .Loadingthemicro… 相似文献
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