基于强化学习的异常反射编码超表面设计  

Design of encoding metasurface for reinforcement learning control of abnormal beam reflection

作　　者：潘宇轩 蒋伊琳[1] 闫成越 李金鑫 PAN Yuxuan;JIANG Yilin;YAN Chengyue;LI Jinxin(School of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《哈尔滨商业大学学报(自然科学版)》2025年第1期38-42,共5页Journal of Harbin University of Commerce:Natural Sciences Edition

摘　　要：研究了电磁超表面对电磁波束的异常反射调控,采用数字化编码的方式控制超表面的附加相位实现人工控制反射波束的方向.设计并仿真了一种32位二进制码控制的编码超表面,超表面的控制编码由强化学习算法生成.强化学习算法在两个方向上搜索编码(电磁波束的异常反射方向和反射信号的功率),以确保超表面实现异常反射功能并减少能量衰减.对编码调控后的超表面在入射波角度固定情况下仿真,结果表明,经过强化学习控制编码调控后的超表面在一定范围内实现了对45°入射的电磁波束反射方向的人工控制使其拥有五个不同的反射角度,反射信号功率可以保持在入射功率的40%以上.This paper investigated the anomalous reflection modulation of electromagnetic beams by electromagnetic metasurface,employing digital encoding to control additional phases of the metasurface for artificial manipulation of reflected beam directions.A 32-bit binary-coded metasurface controlled by a reinforcement learning algorithm was designed and simulated.The control code of the metasurface was generated by the reinforcement learning algorithm.The algorithm searched for codes in two directions:the anomalous reflection direction of the electromagnetic beam and the power of the reflected signal,to ensure the metasurface achievedanomalous reflection functionality and reduced energy attenuation.Simulation results of the metasurface with encoded modulation under fixed incident wave angles indicate that,after reinforcement learning-controlled encoding modulation,the metasurface achieves artificial control of the reflection direction of the electromagnetic beam incident at 45°within a certain range,resulting in five different reflection angles while maintaining reflected signal power above 40%of the incident power.

关 键 词：编码超表面 编码序列 强化学习 反射相位 异常反射 波束调控 

分 类 号：TB34[一般工业技术—材料科学与工程] O441.4[理学—电磁学]