In this paper, a broadband circular polarized (CP) reflectarray using a linear polarized (LP) feed is proposed. First, a single‐layer broadband dual‐line polarized reflectarray unit is designed. This unit converts the LP incident waves into CP reflected waves by providing a phase difference of 90° in the orthogonal direction components of the incident waves. Based on the units proposed, a 109‐element reflectarray was designed and fabricated. The measured results indicate that the reflectarray has a 1‐dB gain bandwidth of 9.15 to 12.79 GHz, or equivalent to a bandwidth of 33.2%. Its 3‐dB axial ratio (AR) bandwidth for CP operation is 37% (9.06‐13.19 GHz). The reflectarray antenna has a peak gain of 23.53 dBi and its highest aperture efficiency is 64.1% achieved at 10 GHz.

中文翻译：

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基于多共振单元的宽带圆偏振反射阵列

本文提出了一种使用线性偏振（LP）馈源的宽带圆偏振（CP）反射阵列。首先，设计了单层宽带双线偏振反射阵列单元。该单元通过在入射波的正交方向分量上提供90°的相位差，将LP入射波转换为CP反射波。基于所提出的单位，设计并制造了一个109元素的反射阵列。测量结果表明，反射阵列的1 dB增益带宽为9.15至12.79 GHz，或相当于33.2％的带宽。CP操作的3dB轴向比率（AR）带宽为37％（9.06-13.19 GHz）。反射阵列天线的峰值增益为23.53 dBi，在10 GHz时其最高孔径效率为64.1％。