Abstract
In this paper, a new single layer subwavelength unit cell is designed for reflective metasurface at 28 GHz suitable for 5G communication with linear phase response and wide bandwidth characteristics. The proposed unit cell is analyzed through Floquet mode analysis for two different sizes. The unit cell with conventional half-wavelength size (HWS) has achieved 590° phase range while the unit cell with a subwavelength size (SWS) of λ/3 has achieved exactly 360° phase range. It is observed that the unit cell with SWS provides linear phase response as compared to the unit cell with HWS. Since non-linear phase response may produce more phase errors on wide range of frequencies, so SWS unit cell with 360° phase range and linear phase response is more suitable option for wideband operation as compared to conventional HWS unit cell with more than 360° phase range.
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