This paper will present a novel design of optically transparent multiple-input multiple-output (MIMO) antenna made by indium tin oxide (ITO) films. The MIMO antenna involves patch and monopole antenna elements at 4.9 GHz and 26 GHz respectively. The upper and lower surface of the MIMO antenna are covered by a thin film of glass substrate with conductive ITO coatings, while top layer is radiating elements and the bottom layers is ground planes. Both patch and monopole antennas are fed by transparent $50\Omega $ transmission lines. The prototypes were fabricated by an in-house photolithography process. Measurements are carried out to confirm the simulation. The characteristics showed that the proposed MIMO antenna can be considered as a potential antenna for 5G smartphone communications applications.

中文翻译：

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使用导电 ITO 薄膜的微波和毫米波 MIMO 天线

本文将介绍一种由氧化铟锡 (ITO) 薄膜制成的光学透明多输入多输出 (MIMO) 天线的新颖设计。MIMO 天线分别涉及 4.9 GHz 和 26 GHz 的贴片和单极天线元件。MIMO天线的上下表面覆盖一层带有导电ITO涂层的玻璃基板薄膜，顶层为辐射元件，底层为接地层。贴片天线和单极天线均由透明的 50 美元/欧米茄传输线供电。原型是通过内部光刻工艺制造的。进行测量以确认模拟。特性表明，所提出的 MIMO 天线可以被视为 5G 智能手机通信应用的潜在天线。