Ultra thin wideband metasurface polarization converter is presented in this paper. The proposed structure is used for linear conversion i.e., X polarized to Y polarized and vice versa. The design of the structure consists of stair case shaped and is fabricated on FR-4 substrate having overall dimension of 3 mm × 3 mm. The Polarization Conversion Ratio (PCR) obtained is wideband having bandwidth of 10.81 GHz (10.57–21.38 GHz) above 89%. Two distinct peaks are observed in the range of interest having frequencies at 11.66 and 18.13 GHz with maximum magnitude of 99.30 and 99.90%. These two peaks occur due to plasmonic resonance. At these two peaks, surface current distribution is plotted to explain the wideband response from the structure. The structure is simulated using commercially available ANSYS HFSS 19.1 and measured inside an anechoic chamber with the help of Vector Network Analyser (VNA). The proposed structure find applications for X (8–12 GHz), Ku (18–21 GHz) and K (21–27 GHz) band. At last the structure is measured with already reported polarization converters and find practical applications for frequency reconfigurable antennas, linearly conversion of incident waves, etc.

中文翻译：

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使用超表面进行线性到线性偏振转换，用于 X、Ku 和 K 波段应用

本文介绍了超薄宽带超表面偏振转换器。所提出的结构用于线性转换，即，X 极化到 Y 极化，反之亦然。该结构的设计由楼梯形状组成，并在整体尺寸为 3 mm × 3 mm 的 FR-4 基板上制造。获得的偏振转换比 (PCR) 是宽带，带宽为 10.81 GHz (10.57–21.38 GHz)，高于 89%。在感兴趣的范围内观察到两个不同的峰值，频率分别为 11.66 和 18.13 GHz，最大幅度为 99.30 和 99.90%。这两个峰是由于等离子体共振而出现的。在这两个峰值处，绘制了表面电流分布以解释结构的宽带响应。该结构使用市售的 ANSYS HFSS 19 进行仿真。1 并在矢量网络分析仪 (VNA) 的帮助下在消声室内测量。所提出的结构适用于 X (8-12 GHz)、Ku (18-21 GHz) 和 K (21-27 GHz) 频带。最后用已经报道的极化转换器测量该结构，并在频率可重构天线、入射波的线性转换等方面找到实际应用。