Wideband circularly polarised antenna with an asymmetric meandered-shaped monopole and defected ground structure for wireless communication

A new geometry of wideband circularly polarised antenna with an asymmetric meandered-shaped monopole is proposed in this communication. The wideband characteristics of the antenna are accomplished by the two asymmetric meandered-shaped perpendicular arms of monopole and defected ground structure having slanting edge. The proposed prototype offers good performance in terms of impedance bandwidth (close to 102.04% in the frequency range 2.4–7.4 GHz) and the 3 dB axial-ratio (AR) bandwidth (close to 37.5% in the frequency range 4.9–6.9 GHz). The realised impedance and AR bandwidths cover the WLAN/Wi-MAX bands and Wi-Fi band (5.5 GHz).