In this article, a novel wideband metal‐only transmitarray based on 1‐bit polarization rotation element is proposed. First, a novel wideband polarization rotation element is designed, which consists of four metallic layers without any substrate layers. The element can be used to rotate polarization of the transmission wave by 90° with respect to that of the incident wave. The element and its mirror image can provide 0° and 180° phase shifts with 1‐bit phase quantization in the 9.2 to 11.2 GHz band with more than 80% polarization conversion rate. Then, by using the proposed element, a 21 × 21‐element transmitarray with a standard pyramidal horn feed is designed and fabricated. The measured results show that the transmitarray achieves 16.8% 1‐dB gain bandwidth with a peak gain of 21.6 dBi. Its cross‐polarization and side‐lobe levels are below −20 and −10 dB, respectively, in the operating band. The measured results agree well with the simulation ones, validating effectiveness of the transmitarray design method.

中文翻译：

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基于1位极化旋转元件的新型宽带纯金属发射阵列天线

本文提出了一种基于1位极化旋转元件的新型宽带纯金属发射阵列。首先，设计了一种新颖的宽带偏振旋转元件，该元件由四个金属层组成，没有任何基底层。该元件可以用于使透射波的偏振相对于入射波的偏振旋转90°。该元件及其镜像可以在9.2至11.2 GHz频带内提供1位相位量化的0°和180°相移，并且偏振转换率超过80％。然后，通过使用所提出的元件，设计并制造了具有标准角锥进给的21×21元件发射阵列。测量结果表明，发射阵列可实现16.8％的1 dB增益带宽，峰值增益为21.6 dBi。在工作频带中，其交叉极化和旁瓣电平分别低于-20 dB和-10 dB。测量结果与仿真结果吻合良好，验证了发射阵列设计方法的有效性。