Design of Log Helical Antenna for UHF/S-band Applications

In this paper, we proposed the design of Log Helical Antenna(LHA) for UHF and S-Band applications. This antenna is modified version of Normal Helical Antenna(NHA). In LHA design both radius and pitch angle of helix are varying logarithmically for achieving the desired frequency range. Proposed LHA design will be operated in UHF (0.3 to 1GHz) and S band (2-4GHz) regions. Design parameters are compared for different number of turns and observed the simulated results.