K.Praveen kumar, K.Sanjeeva Rao, V.Mallikarjuna Rao, N.Anjaneya Varaprasad, C.MuraliMohan,
The data link, mobile satellite, base station, flight termination system and in signal monitoring applications helical antennas are popularly used. Present paper coaxial feed wide band circular polarized helical antenna with three turns of helix structure is designed to operate at 3GHz in Ansoft HFSS software. The results of return loss, impedance, VSWR, gain are studied and presented.