In this letter, we present a dual-polarized orbital angular momentum multiple-input.multiple-output (OAM-MIMO) with uniform circular arrays (UCAs) that achieves a transmission rate of over 200 Gb/s. We design and evaluate the properties of microstrip antennas on 28 GHz band and then fabricate the antennas and implement them on a transmitter and receiver with four UCAs disposed concentrically. Each UCA consists of 16 microstrip antenna elements and is connected to a Butler matrix that can generate and separate five OAM modes (±2, ±1, and 0). There is also a center antenna capable of transmitting mode 0, so the total number of antenna elements is 65 and 21 streams can be transmitted simultaneously. In order to maximize the transmission capacity, we use polarization multiplexing. We conduct two data transmission experiments at a distance of 10 m. In the experiment of virtual dual-polarized OAM-MIMO transmission, we achieved approximately 110 Gb/s transmission for both polarizations. In the experiment of 21 streams, simultaneous transmission of dual-polarized OAM-MIMO, the result of 201.5 Gb/s was achieved.

中文翻译：

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使用双极化OAM-MIMO复用和28 GHz频带上的均匀圆形阵列进行200 Gb / s无线传输

在这封信中，我们介绍了具有均匀圆形阵列（UCA）的双极化轨道角动量多输入多输出（OAM-MIMO），可实现超过200 Gb / s的传输速率。我们设计和评估28 GHz频带上的微带天线的性能，然后制造天线并将其实现在具有四个同心布置的UCA的发射器和接收器上。每个UCA由16个微带天线元件组成，并连接到Butler矩阵，该矩阵可以生成和分离五个OAM模式（±2，±1和0）。还有一个中心天线能够发送模式0，因此天线元件总数为65，可以同时发送21个流。为了最大化传输容量，我们使用偏振复用。我们在10 m的距离上进行了两个数据传输实验。在虚拟双极化OAM-MIMO传输的实验中，两个极化都达到了大约110 Gb / s的传输速度。在21个流的实验中，双极化OAM-MIMO同时传输，结果达到201.5 Gb / s。