In this article, a novel wideband cularly‐polarized serial rotated 2 × 2 circular patch antenna array is presented. The patches are excited sequentially by a broadband feed network. It is found that the antenna array can deliver a measured impedance bandwidth of 46.6% for SWR < 2, 3‐dB axial‐ratio measured bandwidths of 40%, and the measured bandwidth of 70.1% for the gain > 3 dBi.
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Bian et al. (2007) studied this question.
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