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A Planar 4-Bit Reconfigurable Antenna Array Based on the Design Philosophy of information metasurfaces

Engineering 2022年第10期17卷 64-74页

作者： Zheng Xing Wang Hanqing Yang Ruiwen Shao Jun Wei Wu Guobiao Liu Feng Zhai Qiang Cheng Tie Jun Cui State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast UniversityNanjing 210096China The Institute of Electromagnetic Space Southeast UniversityNanjing 210096China

Inspired by the design philosophy of information metasurfaces based on the digital coding concept,a planar 4-bit reconfigurable antenna array with low profile of 0.15λ0(whereλ0is the free-space wavelength)is *** array is based on a digital coding radiation element consisting of a 1-bit magnetoelectric(ME)dipole and a miniaturized reflection-type phase shifter(RTPS).The proposed 1-bit ME dipole can provide two digital states of"0"and"1"(with 0°and 180°phase responses)over a wide frequency band by individually exciting its two symmetrical feeding *** designed RTPS is able to realize a relative phase shift of 173°.By digitally quantizing its phase in the range of 157.5°,additional eight digital states at intervals of 22.5°are *** achieve low sidelobe levels,a 1:16 power divider based on the Taylor line source method is employed to feed the array,A prototype of the proposed 4-bit antenna array has been fabricated and tested,and the experimental results are in good agreement with the *** beams within a±45°range were measured with a maximum realized gain of 13.4 dBi at12 *** sidelobe and cross-polarization levels are below-14.3 and-23.0 dB,***,the beam pointing error is within 0.8°,and the 3 dB gain bandwidth of the broadside beam is 25%.Due to its outstanding performance,the array holds potential for significant applications in radar and wireless communication systems.

关键词： 4-bit reconfigurable antenna array information metasurface Digital coding method Low sidelobe Low profile

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information metasurfaces and intelligent metasurfaces

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Photonics Insights 2022年第1期1卷 2-29页

作者： Qian Ma Che Liu Qiang Xiao Ze Gu Xinxin Gao Lianlin Li Tie Jun Cui State Key Laboratory of Millimeter Waves Southeast UniversityNanjingChina Institute of Electromagnetic Space Southeast UniversityNanjingChina State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsPeking UniversityBeijingChina

Metamaterials and metasurfaces have inspired worldwide interest in the recent two decades due to their extraordinary performance in controlling material parameters and electromagnetic ***,most studies on metamaterials and metasurfaces are focused on manipulations of electromagnetic fields and waves,because of their analog *** concepts of digital coding and programmable metasurfaces proposed in 2014 have opened a new perspective to characterize and design metasurfaces in a digital way,and made it possible to control electromagnetic fields/waves and process digital information simultaneously,yielding the birth of a new direction of information *** the other hand,artificial intelligence(AI)has become more important in automatic designs of *** this review paper,we first show the intrinsic natures and advantages of information metasurfaces,including information operations,programmable and real-time control capabilities,and space–time-coding *** we introduce the recent advances in designing metasurfaces using AI technologies,and particularly discuss the close combinations of information metasurfaces and AI to generate intelligent *** present self-adaptively smart metasurfaces,AI-based intelligent imagers,microwave cameras,and programmable AI machines based on optical neural ***,we indicate the challenges,applications,and future directions of information and intelligent metasurfaces.

关键词： information metasurface artificial intelligence intelligent metasurface.

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Reconfigurable metasurface:A Systematic Categorization and Recent Advances

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Electromagnetic Science 2023年第4期1卷 1-23页

作者： Changhao Liu Fan Yang Shenheng Xu Maokun Li Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Beijing National Research Center for information Science and Technology(BNRist) Beijing 100084China

Considering the rapid progress of theory,design,fabrication and applications,metasurfaces(MTSs)have become a new research frontier in microwave,terahertz and optical *** metasurfaces(R-MTSs)can dynamically modulate electromagnetic(EM)waves with unparalleled flexibility,which has led to a great surge of research in recent *** R-MTSs with powerful capabilities and various functions are being proposed *** on the five dimensions of EM waves,this review proposes a unified model to describe the interactions among R-MTSs,EM waves and EM information and suggests an information bit allocation strategy to categorize different types of R-MTSs *** advances in R-MTSs and 1-bit and 2-bit elements manipulating different wave dimensions are reviewed in ***,this review discusses the future research trends of R-MTSs.R-MTSs with diverse dimensions and functions may propel the next generation of communication,detection,sensing,imaging and computing applications.

关键词： Antenna Electromagnetic surface Electromagnetic wave information bits information metasurface metasurface Multidimension Multifunction Reconfigurable Reflectarray Switch Transmitarray

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