Low-cost and conformal phased array antennas (PAAs) on flexible substrates are of particular interest in many applications. The major deterrents to developing flexible PAA systems are the difficulty in integrating antenna and electronics circuits on the flexible surface, as well as the bendability and oxidation rate of radiating elements and electronics circuits. In this research, graphene ink was developed from graphene flakes and used to inkjet print the radiating element and the active channel of field effect transistors (FETs). Bending and oxidation tests were carried out to validate the application of printed flexible graphene thin films in flexible electronics. An inkjet-printed graphene-based 1 × 2 element phased array antenna was designed and fabricated. Graphene-based field effect transistors were used as switches in the true-time delay line of the phased array antenna. The graphene phased array antenna was 100% inkjet printed on top of a 5 mil flexible Kapton^® substrate, at room temperature. Four possible azimuth steering angles were designed for −26.7°, 0°, 13°, and 42.4°. Measured far-field patterns show good agreement with simulation results.

中文翻译：

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喷墨印刷石墨烯基 1 × 2 相控阵天线。


柔性基板上的低成本共形相控阵天线 (PAA) 在许多应用中特别受关注。开发柔性PAA系统的主要障碍是在柔性表面上集成天线和电子电路的困难，以及辐射元件和电子电路的可弯曲性和氧化率。在这项研究中，石墨烯墨水由石墨烯薄片开发而成，用于喷墨打印场效应晶体管（FET）的辐射元件和有源通道。进行弯曲和氧化测试以验证印刷柔性石墨烯薄膜在柔性电子产品中的应用。设计并制造了基于喷墨印刷石墨烯的1×2元件相控阵天线。基于石墨烯的场效应晶体管被用作相控阵天线实时延迟线中的开关。石墨烯相控阵天线在室温下 100% 喷墨印刷在 5 百万厚的柔性 Kapton ^®基板上。设计了四种可能的方位转向角：-26.7°、0°、13°和42.4°。测量的远场方向图与仿真结果非常吻合。