Design of Four Arm Log Periodic Antenna for MIMO Applications

Abstract

ABSTRACT:The log-periodic antennas are very effectively useful to achieve large bandwidth. The planar logperiodic antennas are having advantage of getting large bandwidth with careful design of impedance matching. The chebyshev impedance matching is one of the techniques to provide feed for the antenna followed by impedance matching. In This paper the log-periodic antenna is designed with chebyshev impedance matching technique. The four arm log-periodic antenna is designed for the both linear and circular polarization. The antenna gives circular polarization when the 90 0 phase delay applied between the two dipoles. The antenna is operated at 3GHz gives the band of operation up to k/ka band from 2GHz. The antenna is designed and simulated by using HFSS software, the VSWR, S 11 and axial ratio plots are generated from 2GHz to 18GHz.