A new coplanner waveguide‐fed broadband circularly polarized (CP) rectangular slot antenna is proposed. Circular polarization (CP) is obtained using L‐shaped feed line protruded from the signal line and rectangle‐shaped parasitic element (PE). The CP bandwidth can be significantly enhanced by placing a strip adjacent to the rectangle‐shaped PE. By adjusting the length of the strip, the CP bandwidth is obtained as high as 48.28% (2.2–3.6 GHz) with axial ratio (AR) ≤ 3 dB. Impedance bandwidth of 63.97% (1.93–3.745 GHz) with VSWR ≤ 2 is achieved. The antenna has a small size of 60 × 50 mm2.
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Saini et al. (2015) studied this question.
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