Dynamic Metasurface Antennas for Higher-Order MIMO Systems in Indoor Environments
Dynamic Metasurface Antennas for Higher-Order MIMO Systems in Indoor Environments
复制标题
用于室内环境中高阶 MIMO 系统的动态超表面天线
DOI：
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发表时间：
2020
影响因子：
6.3
通讯作者：
David R. Smith
中科院分区：
文献类型：
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作者：
Insang Yoo;David R. Smith
我们提出了一种使用动态背腔超表面天线（DMA）作为发射天线的 MIMO 系统，以提高室内 MIMO 信道的信道容量。 DMA 是一个印刷腔，装有可调谐超材料辐射器，并由射频端口供电。 DMA 可以通过单独调节超材料辐射器来生成适应 MIMO 通道的辐射方向图。在这封信中，我们研究了一个在 5.9 GHz 运行的 4 美元 imes 4 MIMO 系统，由作为发射天线的模拟 DMA 和作为接收天线的线性偶极子阵列组成。使用光线追踪技术，我们模拟室内 MIMO 信道并计算不同接收器位置的 MIMO 信道容量。我们证明了 DMA 生成的自适应辐射方向图可以增加信道容量。使用DMA的MIMO系统可以是低成本和低功耗的，并且可以找到带宽、功率和成本受到限制的应用。
We propose a MIMO system using a dynamic cavity-backed metasurface antenna (DMA) as a transmit antenna to improve the channel capacity of indoor MIMO channels. The DMA is a printed cavity loaded with tunable metamaterial radiators and fed by radio frequency ports. The DMA can generate radiation patterns that are adaptive to MIMO channels by individual tuning of the metamaterial radiators. In this letter, we study a 4 $ imes $ 4 MIMO system operating at 5.9 GHz, consisting of a simulated DMA as transmit antenna and a linear dipole array as receive antenna. Using a ray tracing technique, we simulate indoor MIMO channels and compute MIMO channel capacity at different receiver locations. We demonstrate that the adaptive radiation pattern generated by the DMA can increase the channel capacity. The MIMO system using the DMA can be low cost and low in power consumption, and can find applications where bandwidth, power, and cost represent constraints.