A center-fed reflectarray antenna incorporating disk elements with attached phase-delay lines is proposed. Using this type of element, a single-layer reflectarray is fabricated and measured. In spite of utilizing a thin substrate, measurements show 3-dB gain bandwidth of 18%, centered at 11.7 GHz, demonstrating a wideband performance compared to the conventional designs.
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Hasani et al. (2010) studied this question.
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