Low Profile Reflective Polarization Conversion Metasurface With High Frequency Selectivity

Zhao, Yutong; Zhang, Jun-Jie; Wu, Bian

doi:10.1109/tap.2022.3187524

Cited by 19 publications

(8 citation statements)

References 37 publications

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“…[ 16 ] Zhao et al proposed a metasurface consisting of three substrates and four metal layers. [ 17 ] The metasurface exhibits high‐frequency selectivity and low profile, and the PCR is greater than 97% from 4.85 to 5.12 GHz. Geng et al proposed a four‐layered metasurface, which can obtain linear‐to‐linear polarization conversion in 7.40–17.00 GHz.…”

Section: Introductionmentioning

confidence: 99%

A Tunable Dual‐Band Flexible Polarization Converter Based on Vanadium Dioxide Reflective Metasurface

Fu,

Zhang,

Zhang

et al. 2023

Physica Status Solidi (a)

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A flexible dual‐band efficient polarization converter is realized by both coupled mode theory (CMT) analysis and numerical simulation in the microwave regime, using a four‐layered reflective metasurface. The proposed structure can convert linearly polarized electromagnetic (EM) waves into their orthogonal components in the two sidebands and a specular reﬂection performance in the central frequency band. The polarization conversion ratio(PCR) and operating bandwidth of dual‐band can be dynamically modulated by the introduction of vanadium dioxide(VO2). Simulation results show that the proposed metasurface can achieve linear polarization conversion in 8.17‐12.87 GHz and 14.63‐18.92 GHz in the insulating phase. PCRs of the dual‐band are 97.06% and 98.13%, the corresponding relative bandwidths (RB) are 44.68% and 25.58%, respectively. In the metallic phase, the PCRs in 6.81‐13.95 GHz and 16.23‐18.16 GHz are 91.12% (RB=68.79%) and 96.92% (RB=11.22%). The analyses of the phase difference (u‐v coordinate system) and the surface current are given to explain the mechanisms of dual‐band and high PCR. The simulation results are in good agreement with those of CMT. Moreover, the structure has a robust response to the oblique incidence angle (up to 30°) and has polarization insensitivity. The proposed metasurface has great potential applications in antenna radiation, biosensing and stealth technology.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

A Tunable Dual‐Band Flexible Polarization Converter Based on Vanadium Dioxide Reflective Metasurface

Fu,

Zhang,

Zhang

et al. 2023

Physica Status Solidi (a)

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“…Generally, polarization converters can be classified into linear polarization converters [ 14 , 15 , 16 ], linear-to-circular polarization converters [ 17 , 18 , 19 ], and circular polarization converters [ 20 , 21 ] according to their uses. A linear polarization converter can rotate the polarization azimuth of an incident linearly polarized wave by a certain angle, such that the polarization mode of the incident wave is consistent with that of the receiver antenna at the terminal, and the energy loss due to polarization mismatch can be reduced.…”

Section: Introductionmentioning

confidence: 99%

Low Profile Dual-Band Polarization Conversion Metasurface with Omnidirectional Polarization

Zhang

Zhao

et al. 2023

Materials

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In this work, a dual-band transmissive polarization conversion metasurface (PCM), with omnidirectional polarization and low profile, is proposed. The periodic unit of the PCM is composed of three metal layers separated by two substrates. The upper patch layer of the metasurface is the patch-receiving antenna, while the bottom layer is the patch-transmitting antenna. Both antennas are arranged in an orthogonal way so that the cross-polarization conversion can be realized. The equivalent circuit analysis, structure design, and experimental demonstration are conducted in detail, the polarization conversion rate (PCR) is greater than 90% within two frequency bands of 4.58–4.69 GHz and 5.33–5.41 GHz, and the PCR at two center operating frequencies of 4.64 GHz and 5.37 GHz is as high as 95%, with a thickness of only 0.062λL, where λL is the free space wavelength at the lowest operating frequency. The PCM can realize a cross-polarization conversion, when the incident linearly polarized wave at an arbitrary polarization azimuth, which indicates that it has the characteristics of omnidirectional polarization.

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“…Metasurfaces have emerged as practical tools for manipulating electromagnetic (EM) waves through engineered two-dimensional sub-wavelength scatterers. They have been proposed across the frequency spectrum for various functionalities such as anomalous refraction and reflection [1]- [3], absorption [4]- [6], polarization conversion [7]- [9], and cloaking [10]- [12], to name a few. An important application of metasurfaces has been found in wireless communication, specifically in developing smart radio environments [13].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control

Emara,

Kundu,

Macdonell

et al. 2023

IEEE Access

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A novel metasurface reflector unit cell based on two coupled resonators is proposed and demonstrated for real-time reconfigurable beamforming in the X-band (8-12 GHz). The unit cell is composed of a splitring resonator (SRR) with tunable capacitance and a dipole-ring resonator (DRR) with tunable resistance, whose collective variations allow for control over the complex reflectance at a desired frequency. To gain physical insight into its working mechanism, the proposed unit cell is modeled as a coupled Lorentz oscillator using the surface susceptibility description of the unit cell. Thereafter, a metasurface reflector based on the proposed unit cell is demonstrated in full-wave simulations to achieve various beamforming examples, such as beam-steering, side-lobe level control, beam-steering with amplitude control, and multibeam patterns, from a single normally-incident plane wave excitation. Three metasurface reflectors are fabricated to experimentally demonstrate the proposed concept; the first is based on an SRR with a varactor diode, the second is based on a DRR with a PIN diode, and the third is based on the proposed coupled SRR-DRR configuration with both varactor and PIN diodes, for simultaneous magnitude and phase control. The metasurface reflector based on the coupled resonator unit cell is experimentally demonstrated to achieve versatile beam transformations including beam-steering with amplitude control and multi-beam patterns.INDEX TERMS metasurface reflectors, beamforming, side-lobe level control, beam-steering, multibeam patterns, complex reflectance, reconfigurable intelligent surfaces, coupled resonators, smart radio environments.

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Low Profile Reflective Polarization Conversion Metasurface With High Frequency Selectivity

Cited by 19 publications

References 37 publications

A Tunable Dual‐Band Flexible Polarization Converter Based on Vanadium Dioxide Reflective Metasurface

A Tunable Dual‐Band Flexible Polarization Converter Based on Vanadium Dioxide Reflective Metasurface

Low Profile Dual-Band Polarization Conversion Metasurface with Omnidirectional Polarization

Dynamic Metasurface Reflectors Based on Coupled Resonators for Simultaneous Magnitude and Phase Control

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