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Circularly polarized (CP) antennas are an attractive choice for wireless communication because of their reduced polarization loss factor and multi-path interference Circular polarization is also a desirable feature in mobile devices for global positioning system applications Moreover, we proposed a wideband CP monopole slot antenna using a square-shaped ground plane Electrically, small antennas of mobile devices suffer from several inherent problems, such as small bandwidth, high Q-factor, and low efficiency at smaller sizes Therefore, small antennas are often employed to excite the large ground plane of a mobile device for effective radiation.
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Zahid et al. (2019) studied this question.
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