A sequentially rotated polarization conversion metasurface composed by receiver-transmitter unit cell is presented in this article. The receiver-transmitter unit cell has the capabilities that tuning transmission and reflection coefficients independently, which ensure that the metasurface achieves polarization conversion while maintain its reflection coefficients constant. The transmitter patches of the metasurface are arranged in a sequentially rotated order. Through tuning the sizes of the transmitter patches, equal co- and cross-polarization transmission magnitudes with 90° phase difference are obtained. Then linearly polarized wave is converted to circularly polarized wave. Meanwhile, the metasurface is designed to present high reflectivity, so that it can be applied in Fabry-Perot cavity (FPC) antenna and make the antenna obtain high gain. Combined the polarization conversion capability of the metasurface, the FPC antenna can obtain high gain and circular polarization performance simultaneously. The measured results of the fabricated antenna show that the antenna achieves well circular polarization radiation characteristics. The maximum realized gain of the antenna reaches 17 dBic with in the band of 9.75 to 10.25 GHz. The antenna also achieves well AR performance due to the sequential rotation manner adopted by the metasurface. The AR of the antenna is lower than 3 dB in the band of 9.75 to 10.25 GHz.

中文翻译：

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圆极化法布里-珀罗腔天线的顺序旋转极化转换超表面

本文介绍了由接收器-发射器单元组成的顺序旋转偏振转换超表面。接收器-发射器单元具有独立调整透射系数和反射系数的能力，确保超表面实现偏振转换，同时保持其反射系数不变。超表面的发射器贴片按顺序旋转的顺序排列。通过调整发射器贴片的尺寸，可以获得具有 90° 相位差的相等的同极化和交叉极化传输幅度。然后线极化波转换为圆极化波。同时，超表面被设计为具有高反射率，使其可应用于法布里-珀罗腔（FPC）天线，并使天线获得高增益。结合超表面的极化转换能力，FPC天线可以同时获得高增益和圆极化性能。对所制作天线的实测结果表明，该天线具有良好的圆极化辐射特性。在 9.75 至 10.25 GHz 频段内，天线的最大实现增益达到 17 dBic。由于超表面采用的顺序旋转方式，天线也实现了良好的 AR 性能。天线的 AR 在 9.75 至 10.25 GHz 频段内低于 3 dB。对所制作天线的测量结果表明，该天线具有良好的圆极化辐射特性。在 9.75 至 10.25 GHz 的频段内，天线的最大实现增益达到 17 dBic。由于超表面采用的顺序旋转方式，天线也实现了良好的 AR 性能。天线的 AR 在 9.75 至 10.25 GHz 频段内低于 3 dB。对所制作天线的测量结果表明，该天线具有良好的圆极化辐射特性。在 9.75 至 10.25 GHz 频段内，天线的最大实现增益达到 17 dBic。由于超表面采用的顺序旋转方式，天线也实现了良好的 AR 性能。天线的 AR 在 9.75 至 10.25 GHz 频段内低于 3 dB。