多层声学智能表面实现高精度波束调控，提升水下通信效率。
ML-ARIS: Multilayer Underwater Acoustic Reconfigurable Intelligent Surface with High-Resolution Reflection Control
- 多层压电结构配合可调阻抗，实现反射波幅值与相位独立控制。
- 单反射单元即可生成高分辨率幅相信号，实测验证可行性。
- 适合水下通信、声呐系统等需要精准波束成形的场景。
本文提出一种多层声学可重构智能表面（ML-ARIS）架构，面向下一代水下通信。每个声反射单元集成多层压电材料，通过控制电路独立调节各层负载阻抗，从而灵活生成具有期望幅值和正交相位的反射信号，实现单个反射器的被动合成反射。该特性支持精确波束指向，增强目标方向声强，同时抑制周围干扰。通过大量仿真与水池实验验证了其可行性。实验结果表明，在真实场景中利用多层结构实现合成反射是可行的，使单个反射单元可生成高分辨率幅值与相位的反射波。
原文摘要 · Abstract (English)
This article introduces a multilayered acoustic reconfigurable intelligent surface (ML-ARIS) architecture designed for the next generation of underwater communications. ML-ARIS incorporates multiple layers of piezoelectric material in each acoustic reflector, with the load impedance of each layer independently adjustable via a control circuit. This design increases the flexibility in generating reflected signals with desired amplitudes and orthogonal phases, enabling passive synthetic reflection using a single acoustic reflector. Such a feature enables precise beam steering, enhancing sound levels in targeted directions while minimizing interference in surrounding environments. Extensive simulations and tank experiments were conducted to verify the feasibility of ML-ARIS. The experimental results indicate that implementing synthetic reflection with a multilayer structure is indeed practical in real-world scenarios, making it possible to use a single reflection unit to generate reflected waves with high-resolution amplitudes and phases.
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