This work introduces an extremely low profile ( 0.4λhigh0.4\lambda _{high} ) planar ultra-wideband dual-polarized reflectarray. The unit-cell structure of the array is modular in nature, and without any electrical connection between adjacent unit-cells. The array uses tightly coupled dipoles arranged in an egg-crate fashion connected with true-time-delay lines. This array provides the required phase in the highest ever reported bandwidth of 5:1 (3 to 15 GHz) with VSWR< 2.5 for a planar reflectarray. The implementation of the delay-lines is done using a sandwich configuration between two conductive planes, which significantly improves the cross-polarization purity of our reflectarray. To validate our design concept, an 18×1818\times 18 element ( 135×135135\times 135 mm) reflectarray is designed, fabricated, and measured. The measurements exhibit excellent agreement with the simulations.

中文翻译：

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带宽为 5:1 的薄型平面双偏振紧耦合偶极子反射阵列


这项工作介绍了一种极低轮廓（ 0.4λhigh0.4\lambda _{high} ）平面超宽带双偏振反射阵列。该阵列的单位单元结构本质上是模块化的，并且相邻单位单元之间没有任何电连接。该阵列使用紧密耦合的偶极子，以蛋箱的方式排列，并与实时延迟线连接。该阵列以有史以来报道的最高带宽 5:1（3 至 15 GHz）提供所需的相位，并且平面反射阵列的 VSWR< 2.5。延迟线的实现是使用两个导电平面之间的夹层结构来实现的，这显着提高了反射阵列的交叉偏振纯度。为了验证我们的设计理念，设计、制造和测量了 18×1818×18 单元（135×135135×135 mm）反射阵列。测量结果与模拟结果非常吻合。