一种太赫兹可重构超表面设计方法

One method of reconfigurable metasurfaces design for terahertz

太赫兹是第六代无线通信系统的核心技术之一,而可重构超表面技术作为太赫兹感通一体的难点问题,对其进行研究具有重大的意义和价值。本文提出了一种基于肖特基二极管的1 bit相位可重构超表面,通过控制肖特基二极管的偏置电压可以控制超表面单元在‘0’和‘1’两种工作状态间切换,可重构超表面单元在203GHz~230GHz的频段内实现了在‘0’,‘1’两种状态下反射幅度均大于-1dB,反射相位有180°±20°的变化,基于对单元进行组阵仿真试验,通过合理的设计阵面上单元的工作状态,可以实现波束扫描功能。本文所提出的方法为太赫兹可重构超表面的研究提供了一种新思路,在未来6G太赫兹通信等领域有重要的应用价值。

The 6G wireless network envisages the realization of high-speed data rate,ultra-low delay,Wireless interconnection of everything and high spectrum and energy utilization efficiency.Terahertz is one of the key technologies of 6G communication.As the difficult problem of terahertz communication,the research on reconfigurable metasurfaces technology has great significance and value.In this paper,a 1-bit phase reconfigurable metasurface based on Schottky diode is proposed.By controlling the bias voltage of Schottky diode,the metasurface unit cell can be controlled to switch between‘0’and‘1’working states.Through simulation analysis,the designed reconfigurable metasurface unit cell can achieve a reflection amplitude greater than-1dB in both‘0’and‘1’states in the frequency band of 203GHz~230GHz,The reflection phase has a change of 180°±20°.The array simulation is carried out to evaluate the working performance of metasurface.By reasonably designing the working state of the unit cells on the array surface,the beam scanning can be realized.The proposed terahertz reconfigurable metasurface provides a new idea for the study of terahertz reconfigurable metasurface and has important application value in the future 6G terahertz communication and other fields.