scholarly journals High-Efficiency Dual-Frequency Reflective Linear Polarization Converter Based on Metasurface for Microwave Bands

2019 ◽  
Vol 9 (9) ◽  
pp. 1910 ◽  
Author(s):  
Changfeng Fu ◽  
Zhijie Sun ◽  
Lianfu Han ◽  
Chao Liu ◽  
Tao Sun ◽  
...  
Keyword(s):  
Linear Polarization ◽  
Dielectric Layer ◽  
High Efficiency ◽  
Conversion Ratio ◽  
Polarization Conversion ◽  
Dual Frequency ◽  
Polarization Converter ◽  
Polarization Control ◽  
Polarized Waves ◽  
Incident Waves

A dual-broadband and high-efficiency reflective linear polarization converter based on an anisotropic metasurface is presented. The device consists of two symmetrical, double-slotted metallic split-rings and one criss-cross structure, a dielectric layer, and a completely reflective metallic ground. The converter exhibits four resonances and can near-perfectly convert x- or y-polarized incident waves into cross-polarized waves in the frequency ranges of 9.38–13.36 GHz and 14.84–20.36 GHz. The polarization conversion ratios (PCRs) of the two bands are 98.21% and 99.32%, respectively. The energy conversion ratio (ECR) for energy loss measurement is almost 100% in these frequency bands. The polarization conversion principle is studied. The bandwidths and PCRs of the two bands are determined by varying the dielectric layer thickness. The simulation results are consistent with experimental observations. The designed dual-broadband and high-efficiency metasurface has great potential in the application of electromagnetic polarization control.

scholarly journals Dual-Band Transmissive Cross-Polarization Converter with Extremely High Polarization Conversion Ratio Using Transmitarray

Materials ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 1827 ◽  
Author(s):  
Jianxing Li ◽  
Jialin Feng ◽  
Bo Li ◽  
Hongyu Shi ◽  
Anxue Zhang ◽  
...  
Keyword(s):  
Cell Structure ◽  
Conversion Ratio ◽  
Transmitted Wave ◽  
Dual Band ◽  
Polarization Conversion ◽  
Cross Polarization ◽  
Polarization Converter ◽  
Linearly Polarized ◽  
The Cross ◽  
Incident Waves

In this paper, a dual-band cross-polarization converter is proposed. The proposed device can convert linearly polarized incident waves to their cross-polarized transmitted waves. Inspired by the aperture coupled transmitarray, a transmissive multi-layered unit cell structure was designed, which can operate in two frequency bands. The designed structure can manipulate the polarization of the transmitted wave into the cross-polarization of the incident waves at 10.36 GHz and 11.62 GHz. The cross-polarized transmittance of the proposed cross-polarization converter is higher than 0.93. In addition, the transmitted wave has an extremely low co-polarized component, which results in a nearly 100% polarization conversion ratio. The two working frequencies can be tuned independently. The proposed cross-polarization converter was simulated, fabricated and measured. The simulation results confirm with the measurement results.

Broadband and High-efficiency Linear Polarization Converter Based on Reflective Metasurface

2020 ◽  
Author(s):  
Yaxian Guo ◽  
◽  
Jianchun Xu ◽  
Chuwen Lan ◽  
Ke Bi ◽  
...  
Keyword(s):  
Linear Polarization ◽  
High Efficiency ◽  
Polarization Converter

Reflective and transmissive cross-polarization converter for terahertz wave in a switchable metamaterial

2021 ◽  
Author(s):  
Yuanyuan Jiang ◽  
Man Zhang ◽  
Weihua Wang ◽  
Zhengyong Song
Keyword(s):  
Vanadium Dioxide ◽  
High Efficiency ◽  
Incident Angle ◽  
Terahertz Wave ◽  
Polarization Conversion ◽  
Cross Polarization ◽  
Polarization Converter ◽  
Metallic Grating ◽  
Vanadium Dioxide Film ◽  
Wave Conversion

Abstract Utilizing the phase transition characteristic of vanadium dioxide, we present a metamaterial configuration to achieve both reflective and transmissive cross-polarization converters. When vanadium dioxide is metal, the design behaves as a reflective cross-polarization converter. It consists of metallic grating, topas spacer, and vanadium dioxide film. Polarization conversion ratio is more than 90% in the frequency range from 4.80 THz to 13.13 THz. When vanadium dioxide is insulator, the design behaves as a transmissive cross-polarization converter using cascaded metallic gratings with rotation angle . High-efficiency broadband cross-polarization wave conversion is achieved in the frequency band of 0.50-4.75 THz. The effects of oblique incidence on reflective and transmissive modes are studied on polarization conversion. The results tell that cross-polarization conversion is better when incident angle is in the range of -. The designed metamaterial may have a certain inspiration for the research of terahertz multifunctional polarization converter.

Ultra-wideband and high-efficiency reflective polarization converter for both linear and circular polarized waves

2019 ◽  
Vol 125 (2) ◽  
Author(s):  
Baoqin Lin ◽  
Jianxin Guo ◽  
Lintao Lv ◽  
Jing Wu ◽  
Yahong Ma ◽  
...  
Keyword(s):  
High Efficiency ◽  
Ultra Wideband ◽  
Polarization Converter ◽  
Polarized Waves

Ultrathin High-Efficiency Reflective Linear Polarization Conversion Surface Using Double-E Structure for Ku-Band

2019 ◽  
Vol 56 (9) ◽  
pp. 092401
Author(s):  
张灿 Zhang Can ◽  
余世星 Yu Shixing ◽  
龙飞 Long Fei ◽  
杨晓昆 Yang Xiaokun ◽  
张正平 Zhang Zhengping
Keyword(s):  
Linear Polarization ◽  
High Efficiency ◽  
Polarization Conversion ◽  
Ku Band

scholarly journals High-Efficiency Asymmetric Transmission of Red-Near-Infrared Light Based on Chiral Metamaterial

2021 ◽  
Vol 9 ◽  
Author(s):  
Yu Tian ◽  
Zhiwei Chen ◽  
Fang-Fang Ren ◽  
Qingguo Du ◽  
Zhengying Li
Keyword(s):  
Communication Systems ◽  
High Efficiency ◽  
Polarized Light ◽  
Infrared Light ◽  
Polarization Conversion ◽  
Metamaterial Structure ◽  
Polarization Converter ◽  
Asymmetric Transmission ◽  
Linearly Polarized ◽  
Chiral Metamaterial

Designing and fabricating high-performance polarization converters that exhibit asymmetric transmission (AT), for light with different circularly/linearly polarized states with opposite propagating directions, are in high demand. The AT phenomenon leads to potential applications as isolators and circulators in information and communication systems. We propose a chiral metamaterial structure with high AT efficiency for two types of linearly orthogonal polarized red-near-IR light in two opposite incident directions. Theoretical results showed that the proposed chiral metamaterial structure achieves cross-polarization conversion where the polarization conversion ratio (PCR) is over 90%, in a broadband wavelength range from 715 to 810 nm, for both forward-propagating linearly polarized light and backward-propagating orthogonal linearly polarized light. The physical mechanisms of the polarization converter with the AT have been investigated. It was confirmed that the Fabry–Perot-like resonance and coupling between electric and magnetic dipoles lead to highly efficient asymmetric polarization conversion for two orthogonal linearly polarized light. Additionally, the conversion efficiency and bandwidth of the polarization converter are successfully optimized by adjusting the related structure parameters.

3D printing of metasurface-based dual-linear polarization converter

2021 ◽  
Author(s):  
Gyeongyeong Lee ◽  
Yeong-Hoon Noh ◽  
In-Gon Lee ◽  
Ic-Pyo Hong ◽  
Jong-Gwan Yook ◽  
...  
Keyword(s):  
3D Printing ◽  
Linear Polarization ◽  
Orthogonal Polarization ◽  
Polarization Conversion ◽  
Polarization Converter ◽  
Digital Light Processing ◽  
Conductive Materials ◽  
Complex Shapes ◽  
3D Printed ◽  
Materials Used

Abstract 3D printing using digital light processing (DLP) technology has been studied in various fields because of its ability to create complex shapes through a simple process. In this study, DLP 3D printing was employed in the implementation of the metasurface-based dual-linear polarization converter (DLPC). The unit cell of the metasurface-based DLPC for linear polarization conversion was designed consisting of the upper and lower dipole-pair antennas connected through vias and a shielding layer that electrically shields the antennas from each other, and its fabrication was based on the characterization results of the dielectric properties of the photocurable substrate materials and electrical properties of the conductive materials used for synthesizing the metasurface. The printability evaluation of dipole pairs, vias, and a shielding layer was carried out to implement the detailed structures of the DLPC in 3D printing. The electromagnetic wave transmission characteristics of the 3D-printed 8×8 array DLPC demonstrated an orthogonal polarization conversion, as predicted by the simulation results. This study confirmed that the DLP-based 3D printing technology can go beyond the existing functions of manufacturing objects and can be applied to the implementation of various electronics based on different meta-structures.

scholarly journals Multilayer Full Polarization Conversion Transpolarizing Structures

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Misagh Khosronejad ◽  
Gian Guido Gentili ◽  
Giuseppe Macchiarella
Keyword(s):  
Linear Polarization ◽  
Conversion Ratio ◽  
Polarization Conversion ◽  
Polarization Converters

In this paper, we propose the design of two perfect multilayered linear transpolarization structures working in transmission. These linear polarization converters are capable to rotate the polarization 90° independently from the direction of the input linear polarization. Results show an excellent conversion ratio.

Broadband radar cross-section reduction using polarization conversion metasurface

2018 ◽  
Vol 10 (2) ◽  
pp. 197-206 ◽  
Author(s):  
Qi Zheng ◽  
Chenjiang Guo ◽  
Haixiong Li ◽  
Jun Ding
Keyword(s):  
Cross Section ◽  
High Efficiency ◽  
Normal Incidence ◽  
Radar Cross Section ◽  
Conversion Ratio ◽  
Polarization Conversion ◽  
Metallic Plate ◽  
Relative Bandwidth ◽  
Plasmon Resonances ◽  
The Relationship

AbstractA wideband and high-efficiency polarization conversion metasurface (PCM) is proposed and applied to reduce radar cross section (RCS). The proposed PCM unit is composed of two oblique asymmetry triangle split rings, which generate multiple plasmon resonances. Simulated and measured results demonstrate that it achieves polarization conversion over 90% from 9.24 to 17.64 GHz. Besides square checkerboard, the proposed PCM units and mirror units are arranged in triangle checkerboard. The mechanisms of both checkerboard PCMs are analyzed based on standard array theory, including the relationship between RCS reduction value and polarization conversion ratio value. The derived formulas provide a guideline to design checkerboard structure based on PCM. Simulated results demonstrate that both checkerboard PCMs achieve over 62% relative bandwidth of 10 dB RCS reduction under normal incidence with respect to the equal-sized metallic plate, which also means that the triangle one could be an alternative solution to reduce RCS. To verify the analyzed and simulated results, the fabricated sample and measured results of both checkerboard PCMs are presented. Good agreements are achieved between measurements, simulations and numerical analysis.

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