In this letter, a polarization converter is proposed for triband simultaneous microwave transmission in X, Ku, and Ka bands. It converts the incident linearly polarized (LP) waves into transmitted circular polarized (CP) waves in three frequency bands. The unit cell of the converter is composed of ultrathin bilayered metasurface having a thickness of about λ/40, patterned with a square ring and five squares conductor patches diagonally intersecting each other. The step-by-step design guideline for LP-to-CP conversion is presented with a converter example whose operational bands are 7.317-9.58, 25.45-31.4, and 35.37-42.167 GHz. To verify the design, a sample consisting of 20 × 20 elements is fabricated using a standard printed circuit board (PCB) fabrication process and tested inside the anechoic chamber. Close agreement between the simulated and measured results depicts the validity and reliability of the proposed design.

中文翻译：

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用于 X/Ku/Ka 波段微波传输的三频超薄偏振转换器


在这封信中，提出了一种用于 X、Ku 和 Ka 频段三频同步微波传输的偏振转换器。它将入射的线偏振（LP）波转换为三个频段的透射圆偏振（CP）波。转换器的单元由厚度约为λ/40的超薄双层超表面组成，其图案为方形环和五个彼此对角相交的方形导体贴片。 LP 到 CP 转换的分步设计指南通过转换器示例提供，其工作频段为 7.317-9.58、25.45-31.4 和 35.37-42.167 GHz。为了验证设计，使用标准印刷电路板 (PCB) 制造工艺制造了一个由 20 × 20 元件组成的样品，并在消声室内进行了测试。模拟结果和测量结果之间的密切一致性说明了所提出设计的有效性和可靠性。