Triple-Band Polarization Angle Independent 90° Polarization Rotator Based on Fermat's Spiral Structure Planar Chiral Metamaterial

Cheng, Yongzhi; Li, Wangyang; Mao, Xuesong

doi:10.2528/pier18112603

Cited by 48 publications

(19 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One of their most common applications is EM polarization control. Therefore, different anisotropic metamaterial structures and chiral metamaterials have been introduced from microwave to optics frequency range 7 – 10 . However, as previously mentioned their narrow bandwidth generally restricts their applications.…”

Section: Introductionmentioning

confidence: 99%

Multiband and multifunctional polarization converter using an asymmetric metasurface

Pouyanfar

Nourinia

Ghobadi

2021

Sci Rep

View full text Add to dashboard Cite

A compact and asymmetric multi-band reflective polarization converter metasurface has been offered in this paper. The proposed simple converter can effectively convert an incident linearly polarized EM wave to its orthogonal counterpart and circular polarized waves (RHCP and LHCP) at two frequency bands. The design consists of a square with two curves on the top right and lower left corners and a square Split Ring Resonator (SRR) responsible for linear-to-linear and linear-to-circular polarization conversions, respectively. The simulated results show that the converter successfully transforms a y-polarized incident wave to its orthogonal counterpart in a frequency range of 15.5–16.5 GHz with unity conversion at 16 GHz and circularly-polarized (RHCP) wave at 13 GHz and (LHCP) at 18 GHz, verified through the fabricated and measured sample. Wide angular stability up to 60° oblique incidence along with high efficiency reveals the good applicability of the structure. Moreover, the root cause of the cross-polarization conversion has been analyzed and confirmed through Bi-Mode Foster equivalent circuit and surface current distribution as well. Finally, a fabricated prototype is tested to validate the simulated results through measurement.

show abstract

Section: Introductionmentioning

confidence: 99%

Multiband and multifunctional polarization converter using an asymmetric metasurface

Pouyanfar

Nourinia

Ghobadi

2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Azimuth rotation angle (θ) and ellipticity (η) are the parameters that characterize the amplitude and phase difference of LHCP and RHCP waves when LP wave passes through CMM. Azimuth rotation angle and ellipticity are given by following equations [18,19],…”

Section: The Physical Properties Of Chiral Metamaterialsmentioning

confidence: 99%

Design of Circular Polarized Antenna Using Gammadion Chiral Metamaterial as Linear-to-Circular Polarization Transformer

Kaur¹,

Prajapati²

2020

PIER M

View full text Add to dashboard Cite

The application of gammadion chiral metamaterial for converting linearly polarized waves to circularly polarized waves is presented in this paper. First of all, a traditional rectangular microstrip patch antenna has been designed at resonance frequency of 5.15 GHz, which gives linear polarization. The linearly polarized waves are allowed to feed gammadion chiral metamaterial, which is placed at a height of 33 mm above the reference antenna. The gammadion chiral metamaterial produces two special effects that are responsible for polarization rotation: circular dichroism and optical activity. As a result of these effects, the necessary conditions for circularly polarized radiation are fulfilled, and linear antenna is converted to the circularly polarized antenna. This method gets rid of designing of complicated feeding structure that is necessary for circular polarization. The role of gammadion chiral metamaterial to convert linear polarization to circular polarization has been described. The antenna is fabricated, and the measurement of return loss, axial ratio, radiation patterns, etc. is also carried out. Simulation and measurement results agree with each other.

show abstract

“…In the past few years, rapid development of metamaterials (Liu et al, 2000;Fang et al, 2006;Li et al, 2009;Toyoda et al, 2011;Christensen and de Abajo, 2012;Liang and Li, 2012;Quan et al, 2014;Cummer et al, 2016;Cheng et al, 2019; and metasurfaces (Li et al, 2013;Tang et al, 2014;Xie et al, 2014;Xie et al, 2017;Assouar et al, 2018;Holloway et al, 2019;Quan et al, 2019;Zhu and Assouar, 2019;Gao et al, 2020;Nikkhah et al, 2020) provides an unprecedented way to overcome the limits of conventional absorption materials and realize high absorption performance. These absorbing structures usually contain subwavelength resonant units to enhance energy density and dissipate sound energy inside.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Thin Metasurface-Based Absorber of Low-Frequency Sound With Bandwidth Optimization

Guan

Sun

et al. 2021

Front. Mater.

View full text Add to dashboard Cite

We report, both theoretically and experimentally, a type of ultra-thin metasurface-based low-frequency sound absorber with bandwidth optimization. Such a metasurface unit consists of an ultrathin resonator (thickness∼1/90 wavelength) with a circular hole on the upper panel and four narrow slits inside a multiple-cavity structure. Eigenmode simulations of the unit show rich artificial Mie resonances, in which a type of monopolar Mie resonance mode can be obtained at 238.4 Hz. Based on the excitation of the monopolar mode, we can realize the near-perfect low-frequency sound absorption with the maximum absorption coefficient and fractional bandwidth of 0.97 and 12.9%, respectively, which mainly arises from the high thermal-viscous loss around the circular hole and four narrow slits of the unit. More interestingly, by combining 4 units with different diameters of the circular hole, we further enhance the fractional bandwidth of the compound unit to 18.7%. Our work provides a route to design ultra-thin broadband sound absorbers by artificial Mie resonances, showing great potential in practical applications of low-frequency noise control and architectural acoustics.

show abstract

Triple-Band Polarization Angle Independent 90° Polarization Rotator Based on Fermat's Spiral Structure Planar Chiral Metamaterial

Cited by 48 publications

References 40 publications

Multiband and multifunctional polarization converter using an asymmetric metasurface

Multiband and multifunctional polarization converter using an asymmetric metasurface

Design of Circular Polarized Antenna Using Gammadion Chiral Metamaterial as Linear-to-Circular Polarization Transformer

Ultra-Thin Metasurface-Based Absorber of Low-Frequency Sound With Bandwidth Optimization

Contact Info

Product

Resources

About