Abstract
paper introduces low profile linear-to-circular polarization and left hand circular polarization to right hand circular polarization converters based on third-order metasurface structure that operates at the X-band. The metasurface unit cell is composed of three metal layers and is separated by two dielectric substrates. The transmission coefficients at two orthogonal directions are equal, while a 90° or 180° transmission phase difference is introduced between them over a wide bandwidth. A horn antenna is employed as a linear source to verify the performance of the linear-to-circular polarization converter, while a helical antenna is designed as the source of the left hand circular polarization to right hand circular polarization converter. The results show that the designed metasurface can effectively convert a linear polarized (LP) wave to a left-hand circular polarized (LHCP) wave or a left hand circular polarized wave to right hand circular polarized wave.
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