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An annular‐ring slot antenna with pair of slits and truncated corner for CP operation is proposed. A pair of slits and truncated corners are used to enhance axial ratio bandwidth. The proposed antenna is fabricated and simulated to analyze its radiation characteristics. Simulated results show a good agreement with experimental results. The antenna also shows much larger CP bandwidths than earlier reported results. The measured impedance bandwidth and 3‐dB axial ratio bandwidth (ARBW) of the proposed antenna are 94.2 and 73.8%, respectively. The proposed antenna shows consistent return loss and radian pattern for entire frequency band.
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Kumar et al. (2013) studied this question.
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