基于微波网络理论的可重构超表面单元设计方法与性能上限分析

吴优; 刘长昊; 周嵩林; 杨帆; 任永丽; 许慎恒; 李懋坤

doi:10.12263/DZXB.20221373

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基于微波网络理论的可重构超表面单元设计方法与性能上限分析

太赫兹超表面技术及应用 | 更新时间：2025-12-08

- 基于微波网络理论的可重构超表面单元设计方法与性能上限分析
- Design Method and Performance Limit Analysis of Reconfigurable Metasurface Element Based on Microwave Network Theory
- 电子学报 2023年51卷第10期页码：2680-2689
- 作者机构：
  
  清华大学电子工程系，北京 100084
- 作者简介：
  
  [ "吴优男，1994年12月出生于安徽省.现为清华大学电子工程系博士研究生.主要研究方向为可重构天线、太赫兹天线等.E-mail: wuy19@mails.tsinghua.edu.cn" ]
  [ "刘长昊男，1998年10月出生于重庆市.现为清华大学电子工程系博士研究生.主要研究方向为界面电磁学的理论与应用、可重构反射阵天线等.E-mail: liu-ch21@mails.tsinghua.edu.cn" ]
  [ "周嵩林男，1998年4月出生于四川省.现为清华大学电子工程系博士研究生.主要研究方向为可重构反射阵天线、复用反射阵天线等. E-mail: zhou-sl20@mails.tsinghua.edu.cn" ]
  [ "杨帆（通讯作者）男，1975年出生于湖北省.现为清华大学电子工程系教授.主要研究方向为现代天线理论、设计与测量，新型电磁材料的探索和应用，电磁场数值算法与优化，以及应用电磁系统的研究与开发等.中国电子学会会员编号：E190010166S." ]
  [ "任永丽女，1987年出生于内蒙古自治区.现为清华大学电子工程系工程师.主要研究方向为毫米波及太赫兹高性能智能超表面理论研究与设计、无线通信系统天线测量方法与传输系统验证.E-mail: renyongli@tsinghua.edu.cn" ]
  [ "许慎恒男，1978年出生于江苏省.现为清华大学电子工程系副研究员.主要研究方向为新型应用系统中的高增益天线设计、人工电磁结构、电磁场与天线理论，以及优化算法研究和应用.E-mail: shxu@tsinghua.edu.cn" ]
  [ "李懋坤男，1979年出生于辽宁省.现为清华大学电子工程系副教授.主要研究方向为电磁场理论与计算电磁学，特别是电磁建模与数据反演快速算法及其在地球物理、生物医学等领域的应用.E-mail: maokunli@tsinghua.edu.cn" ]
- 基金信息：
  
  军科委173基金(2021-JCJQ-JJ-0854)
- DOI：10.12263/DZXB.20221373
  中图分类号： TN95;
- 收稿：2022-12-07，
  
  修回：2023-07-12，
  
  纸质出版：2023-10-25
- 稿件说明：
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吴优,刘长昊,周嵩林等.基于微波网络理论的可重构超表面单元设计方法与性能上限分析[J].电子学报,2023,51(10):2680-2689.

WU You,LIU Chang-hao,ZHOU Song-lin,et al.Design Method and Performance Limit Analysis of Reconfigurable Metasurface Element Based on Microwave Network Theory[J].ACTA ELECTRONICA SINICA,2023,51(10):2680-2689.
吴优,刘长昊,周嵩林等.基于微波网络理论的可重构超表面单元设计方法与性能上限分析[J].电子学报,2023,51(10):2680-2689. DOI： 10.12263/DZXB.20221373.

WU You,LIU Chang-hao,ZHOU Song-lin,et al.Design Method and Performance Limit Analysis of Reconfigurable Metasurface Element Based on Microwave Network Theory[J].ACTA ELECTRONICA SINICA,2023,51(10):2680-2689. DOI： 10.12263/DZXB.20221373.

摘要

在微波频段，应用在可重构超表面单元上的开关往往具有良好的通断性能，可以在单元层面实现低损耗、180°相位差的1-比特相位量化特性.随着频率提升到毫米波甚至太赫兹频段，开关性能会因为寄生效应而下降，引起可重构超表面单元的设计困难.在本工作中，将可重构超表面单元的等效为一个微波二端口网络模型，通过分析网络的阻抗参数和散射参数，指出了单元反射系数与开关反射系数的传递关系.所提的关系式，经过不同频段的不同开关与单元结构的仿真验证.本工作可以根据任意开关参数，给出1-bit的单元的性能上限，所提的设计流程可以指导太赫兹可重构超表面单元的设计与优化.

Abstract

In the microwave frequency band

switches applied to reconfigurable metasurface units often have good on-off performance

and can achieve 1-bit phase quantization characteristics with low loss and 180° phase difference. As the frequency increases to the millimeter wave or terahertz band

the switching performance will degrade due to parasitic effects

which makes the design of reconfigurable metasurface units difficult. In this work

the equivalent model of the reconfigurable metasurface unit is a microwave two-port network. By analyzing the impedance parameters and scattering parameters of the network

the transfer relationship between the unit reflection coefficient and the switching reflection coefficient is pointed out. The proposed relationship is verified by simulation of different switches and unit structures in different frequency bands. This work provides the upper limit of the performance of a 1-bit unit according to arbitrary switching parameters. The proposed design procedure can guide the design and optimization of terahertz reconfigurable metasurface element.

关键词

Keywords

references

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