Abstract
A novel broadband microstrip line feed dual circular polarized, two port printed monopole antenna is presented. The proposed antenna comprises of a partial ground plane with arrow shaped stub at the corner which is capable to generate wide axial ratio bandwidth and a pair of inverted L-shaped feed lines for radiating left hand circular polarized wave when the port 1 is excited and right hand circularly polarized wave when the signal is applied at port 2 with in the same axial ratio bandwidth. The 3 dB axial ratio bandwidth of the antenna is about 58% (1.7 GHz–3.1 GHz) in which the return loss and isolation are better than 10 dB and 12 dB respectively. A parametric study of proposed antenna’s parameters is given for understanding of the antenna performance. The gain, S11 and S21 are higher than 1, 10 and 12 dB respectively within the axial ratio and impedance band.
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