Metamaterial-based omnidirectional circularly polarized antenna array for 2.4-GHz WLAN applications

Abstract

A metamaterial-based omnidirectional circularly polarized antenna array with combined zero-phase-shift line loop and dipole is presented for 2.4-GHz wireless local area networks. A four-element linear antenna array with an overall size of 66 mm × 66 mm × 258 mm shows desirable performance over the frequency range of 2.4 GHz-2.5 GHz with |S11| less than -10 dB, gain greater than 4.6 dBic, axial ratio less than 3 dB.