A Metasurface-Based, Ultrathin, Dual-Band, Linear-to-Circular, Reflective Polarization Converter: Easing uplinking and downlinking for wireless communication

Nama, Lavesh; Nilotpal,; Bhattacharyya, Somak; Jain, P. K.

doi:10.1109/map.2020.3043460

Cited by 43 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The structure has a high conversion efficiency of up to 80% while operating as a right-handed circular polarization converter from 8.34 to 8.71 GHz and as a left-handed circular polarization converter at 10.3-14.73 GHz. 22 If spatial asymmetry is introduced into the design, for example, elliptical or rectangular, the effective indices experienced by the THz wave along the x and y directions will be different, leading to stable phase retardance. 23 The design and optimization using the method of rotating combinations of two-layer elliptical cylinders, which we studied previously, can yield an achromic bandwidth of about 0.8 THz.…”

Section: Introductionmentioning

confidence: 99%

“…Nama et al fabricated an ultra‐thin, dual‐band reflective linear circular EM polarization converter. The structure has a high conversion efficiency of up to 80% while operating as a right‐handed circular polarization converter from 8.34 to 8.71 GHz and as a left‐handed circular polarization converter at 10.3–14.73 GHz 22 . If spatial asymmetry is introduced into the design, for example, elliptical or rectangular, the effective indices experienced by the THz wave along the x and y directions will be different, leading to stable phase retardance 23 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Terahertz wideband wave plates designed by stacking multilayered metasurface with different geometries

Zhang

Gong

Pang

2023

Micro & Optical Tech Letters

View full text Add to dashboard Cite

The use of metamaterials in terahertz (THz) polarization wave plates is widespread. Metallic metamaterials, however, typically operate within a constrained bandwidth and have a large ohmic loss. All‐dielectric metamaterials could address these issues. To achieve an ultrawide‐band at THz frequencies, a multilayered silicon metasurface with elliptical or rectangular pillars has been employed. According to simulations, the achromatic relative bandwidth of the dielectric metamaterial can remain flat within a broadband with the appropriate structural parameters. Additionally, a scoring system with error analysis is added to help with choosing the geometry of terahertz polarization wave plates with various layers of metasurface. Due to its flexible polarization control capability, the proposed multilayer metasurface may open the door for arbitrary phase delays of incident waves.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Terahertz wideband wave plates designed by stacking multilayered metasurface with different geometries

Zhang

Gong

Pang

2023

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…By using anisotropic unit cell, polarization converters can change the polarization direction of reflected or transmitted electric field, which has been attracting much attention in recent years. Polarization convertors have been proposed with single-band [18], dual-bands [19,20], multi-bands [21], and broadband [22][23][24][25]. To further expand the bandwidth, many kinds of different unit cells, such as ring/disk cavity [22], elliptical disk-ring [24], and double-head arrow [25], have been reported.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Thin Wideband Reflection Reduction Metasurface Based on Polarization Conversion

Han¹,

Wen²,

Xie³

et al. 2022

PIER

View full text Add to dashboard Cite

Reflection reduction metasurface is capable of suppressing the radar cross section of a target, which is of great importance in stealth technology. However, it is still a challenge to realize broadband and low-profile simultaneously within a simple design. Here, we experimentally demonstrate an ultra-thin wideband reflection reduction metasurface, which is achieved by utilizing polarization conversion instead of resonant absorption. The simple cut-wire unit cell is adopted to perform efficient cross polarization conversion, which leads to a polarization conversion ratio above 90% ranging from 8.4 to 14.7 GHz. By arranging the 0/1 units in chessboard layout, the reflection reduction reaches 10 dB from 8.1 GHz to 14.6 GHz. Measured results agree well with simulated ones, which validates the effectiveness of the proposed structure. The ratio of thickness to maximum wavelength reaches 0.56 while the relative bandwidth reaches 57.3%, demonstrating an excellent comprehensive performance. Since our structure consists of refractory ceramic materials, it is promising for radar cross section reduction in high temperature environment.

show abstract

“…Future communications will use polarization methods to exchange information between different devices, in which the polarization control devices are indispensable. Manipulating polarization and propagation states of EM waves have been realized for both transmission and reflection modes over microwave, [13][14][15] terahertz, [16][17][18] infrared, 19 and optical frequency bands. 20 The interaction of EM waves with anisotropic MMs allows for manipulation of the polarization by altering the phase of the incident wave.…”

Section: Introductionmentioning

confidence: 99%

Broadband linear‐to‐circular polarization reflector using anisotropic metasurface

Long

Yang

et al. 2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A high-performance polarization reflector is introduced based on anisotropic metasurface. This structure can convert a linearly polarized (LP) incident electromagnetic (EM) wave into a circularly polarized (CP) reflection wave. The unit cell of the proposed metasurface is made of metallic patch imprinted on the top surface of a metal-backed single-layer dielectric substrate. The shape of this metallic patch is a combination of a deformed Jerusalem cross and two deformed L. The simulation results show that the LP incident EM wave is converted to CP reflected wave from 7 to 19.4 GHz, which the bandwidth of axis ratio less than 3 dB is 12.4 GHz and the relative bandwidth is 94%. The current distributions and equivalent circuit model are given to analyze the generation of circularly polarized waves. To verify the metasurface structure performance, a sample consisting of 24 × 24 unit cells is fabricated and measured. The experimental and simulation 3-dB AR bandwidth are basically consistent with each other, which verify the properties of the design. The proposed metasurface structure has potential application in microwave sensors and antenna design to manipulate the polarization states of EM waves.

show abstract

A Metasurface-Based, Ultrathin, Dual-Band, Linear-to-Circular, Reflective Polarization Converter: Easing uplinking and downlinking for wireless communication

Cited by 43 publications

References 23 publications

Terahertz wideband wave plates designed by stacking multilayered metasurface with different geometries

Terahertz wideband wave plates designed by stacking multilayered metasurface with different geometries

An Ultra-Thin Wideband Reflection Reduction Metasurface Based on Polarization Conversion

Broadband linear‐to‐circular polarization reflector using anisotropic metasurface

Contact Info

Product

Resources

About