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A simplified analytical procedure is suggested for the design of a four-element symmetrical uniformly excited nonunifody spared linear antenna array. The errors resulting from the simplification are shown to be negligible for sidelobes of practical significance. Abstract-The measured voltage standing wave ratio (VSWR), gain, pattern, and axial ratio characteristics of a uniformly wound helical antenna are presented. Experimental parametric studies were made of 1) fixed length hel i ces withdoi:10.1109/tap.1980.1142324 fatcat:u3fpnksikbfxzarc7se5rbbz6a