Circuit Theory Analysis of the input impedance in a Tap Feed Small Normal-Mode Helical Antenna

+ Department of Electrical and Electronic Engineering, National Defense Academy 1-10-20 Hashirimizu Yokosuka 239-8686 Japan, e-mail: g47098@nda.ac.jp ++ The Yokohama Rubber Co.Ltd, Hiratsuka-shi, 254-8601, Japan

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