AI 中文总结
本研究提出一种无需集成电源的光热驱动1比特反射阵列单元，通过光热开关实现调制，实验验证了单元及4单元阵列的独立控制能力，为形状变形反射阵列开辟新途径。
AI 中文摘要
形状变形材料有望实现简单、可调谐的电信阵列，而无需复杂的电路。然而，现有设备要么缺乏单个单元的控制，要么需要集成电源，从而降低了波束转向能力并增加了尺寸、重量和功耗。本文提出了一种简单的、光热激活的1比特反射阵列单元，无需集成电源。该单元由二聚体元件组成，通过光热激活的电桥连接或断开以实现调制。本文讨论了用于开关的形状记忆材料，并提出了光热开关机制的设计。通过波导实验验证了该单元，在3.7GHz工作频率下与仿真结果高度一致。最后，创建了一个4单元阵列。每个单元依次激活，仿真与实验之间具有良好的一致性，展示了单独控制每个单元的能力。因此，本研究证明，1比特单元可以在没有复杂电子设备或集成电源的情况下进行光热配置，为新型形状变形反射阵列开辟了道路。
英文摘要
Shape-morphing materials have the potential to realise simple, tunable telecommunication arrays without the need for complex circuitry. However, existing devices either lack individual cell control, or require an integrated power supply, reducing their beamsteering ability and increasing size, weight and power consumption. This paper presents a simple, photothermally activated 1-bit reflectarray unit cell requiring no integrated power sources. The unit cell consists of dimer elements, which are connected or disconnected via a photothermally activated electrical bridge to achieve modulation. The paper discusses the shape memory materials used for switching, and presents a design for a photothermal switching mechanism. The unit cell is validated by waveguide experiments, showing strong agreement with simulations at the working frequency of 3.7GHz. Finally, a 4-cell array is created. Each cell is activated sequentially, with good agreement between simulation and experiment, demonstrating the ability to control each cell exclusively. This study therefore demonstrates that a 1-bit unit cell can be photothermally configured without complicated electronics or an integrated power supply, opening the door to a new class of shape-morphing reflectarray.
