A novel dual-polarization, single-layer reflectarray has been designed and manufactured to operate at receive (20 GHz) and transmit (30 GHz) frequencies for Ka-band terminal antennas. The reflectarray unit cell is composed of several types of resonant elements printed on the upper side of a conductor-backed substrate, which are designed to produce a collimated beam at 20 and 30 GHz in dual polarization. Cross-shaped loops are used to provide the required phases at 20 GHz, while crossed dipoles and modified truncated rings are used to control the phasing at 30 GHz. The resonant lengths of the proposed elements have been adjusted cell by cell by means of a two-dimensional interpolation method to achieve the required phase shift at each frequency. Two different feeds have been used to illuminate the reflectarray at 20 and 30 GHz. The measured gain is 28.02 dBi at 20 GHz and 32.14 dBi at 30 GHz. The measurement results show that the radiation patterns of the designed single-layer reflectarray antenna are in good agreement with those achieved from the simulations.

中文翻译：

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一种新型单层Ka波段反射阵列天线的设计与制造

一种新颖的双极化单层反射阵列已被设计和制造，可在 Ka 波段终端天线的接收 (20 GHz) 和发射 (30 GHz) 频率下工作。反射阵列单元由几种类型的谐振元件组成，这些谐振元件印刷在背导体基板的上侧，设计用于在 20 和 30 GHz 双极化下产生准直光束。十字形环用于在 20 GHz 提供所需的相位，而交叉偶极子和改进的截断环用于控制 30 GHz 的相位。所提出的元件的谐振长度已通过二维插值方法逐个单元地调整，以在每个频率处实现所需的相移。已使用两种不同的馈源在 20 和 30 GHz 下照亮反射阵列。测得的增益在 20 GHz 时为 28.02 dBi，在 30 GHz 时为 32.14 dBi。测量结果表明，所设计的单层反射阵列天线的辐射方向图与仿真得到的辐射方向图非常吻合。