NDLI: Ultra-wideband anomalous reflection realised by a gradient metasurface

Content Provider	IET Digital Library
Author	Lin, Bao qin Lv, Lin tao Guo, Jianxin Wang, Zuliang Huang, Shiqi Huang, Baigang
Abstract	In this work, an ultra-wideband gradient metasurface (GM) is designed by using Pancharatnam–Berry (PB) phase. In the design process, a circular polarisation (CP)-maintaining metasurface (CMM) is proposed at first, which can realise ultra-wideband CP-maintaining reflection in the frequency band of 7.7–19.9 GHz, moreover, PB phase will be generated in its co-polarised reflection coefficient under CP incidence by rotating the anisotropic resonators in its unit cells. Thus, based on the CMM, an ultra-wideband GM is designed by using PB phase. Both the simulation and experiment show that the designed GM can realise ultra-wideband anomalous reflection under arbitrary polarised incidence, the reflected wave under CP incidence will be deflected to an anomalous direction and even be converted to a surface wave; but under linearly polarised and elliptically polarised incidences, the reflected wave will be separated into two beams. In addition, to design more anomalous reflection metasurfaces, the generation principle of PB phase, together with the root cause of the CP-maintaining reflection of the proposed CMM, has been analysed in detail in the designing process.
Starting Page	1424
Ending Page	1430
Page Count	7
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 12, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2020.0405
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-06-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Anisotropic Resonator Anomalous Direction Anomalous Reflection Metasurfaces Arbitrary Polarised Incidence Circular Polarisation-maintaining Metasurface Copolarised Reflection Coefficient CP Incidence Design Process Electromagnetic Wave Electromagnetic Wave Polarisation Electromagnetic Wave Reflection Elliptically Polarised Incidences Frequency 7.7 GHz to 19.9 GHz Linearly Polarised Incidences Microwave MetaMaterial Pancharatnam-Berry Phase PB Phase Reflected Wave Ultrawideband Anomalous Reflection Ultrawideband Gradient Metasurface Unit Cell
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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