A Wideband Cross Polarization Conversion Using Metasurface

Bhattacharyya, Somak; Ghosh, Saptarshi; Srivastava, Kumar Vaibhav

doi:10.1002/2017rs006396

Cited by 67 publications

(33 citation statements)

References 24 publications

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“…4 and 24.2 GHz are nearly equal. This satisfy the condition of impedance matching of the medium (proposed surface) with the free space resulting in minimum co-polarization reflection and maximum PCR of the surface 49 . The retrieved effective parameters are listed in Table.…”

Section: Resultsmentioning

confidence: 90%

Design and experimental analysis of dual-band polarization converting metasurface for microwave applications

Khan¹,

Kamal

Ullah³

et al. 2020

Sci Rep

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The manipulation of polarization state of electromagnetic waves is of great importance in many practical applications. In this paper, the reflection characteristics of a thin and dual-band metasurface are examined in the microwave frequency regime. The metasurface consists of a 22 × 22 element array of periodic unit cells. The geometry of the unit cell consists of three layers, including a 45° inclined dipole shape metal patch on top, which is backed by a 1.6 mm thick FR-4 substrate in the middle, and a fully reflective metallic mirror at the bottom. The proposed surface is exposed to horizontally (x) or vertically (y) polarized plane waves and the co and cross polarization reflection coefficients of the reflected waves are investigated experimentally in the 6–26 GHz frequency range. The metasurface is designed to convert incident waves of known polarization state (horizontal or vertical) to orthogonal polarization state (vertical and horizontal) in two distinct frequency bands, i.e. 7.1–8 GHz and 13.3–25.8 GHz. In these two frequency bands the simulated and experimental results are in good agreement. The polarization conversion ratio (PCR) of the surface is greater than 95% in the targeted frequency bands. A detailed parametric analysis of the metasurface is also discussed in this work and it has been estimated that the surface has the additional ability to convert linearly polarized waves to circularly polarized waves at several distinct frequencies. The proposed metasurface can be utilized in sensor applications, stealth technology, electromagnetic measurements, and antennas design.

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Section: Resultsmentioning

confidence: 90%

Design and experimental analysis of dual-band polarization converting metasurface for microwave applications

Khan¹,

Kamal

Ullah³

et al. 2020

Sci Rep

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“…Metasurface plays a vital role in controlling electromagnetic (EM) wave and diversifies into several applications, such as absorbers, polarizers, cloaking, sensors, and many more 1‐3 . Recently the research in the terahertz gap (0.1‐10 THz) lying in the transition bands of the mm‐wave and optical region have generated interest due to the availability of high bandwidth and allocation of several users 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Graphene based metasurface with near unity broadband absorption in the terahertz gap

Ghosh

Das

Bhattacharyya

2020

Int J RF Microw Comput Aided Eng

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This paper reports a novel graphene metasurface exhibiting near-unity absorption over a wide bandwidth of 9.74 THz ranging from 2.06 to 11.80 THz with a fractional bandwidth of 140.86% with respect to the center frequency of 6.93 THz within the terahertz gap of the electromagnetic spectrum. The proposed structure consists of two layers of graphene separated by silicon dioxide (SiO 2). On the top of SiO 2 , a modified fractal-shaped 1 nm thick graphene pattern is deposited while a square-shaped graphene pattern of identical thickness completely covers the backside of the SiO 2 substrate. The absorber was found to be polarization independent under the normal incidence of the approaching electromagnetic wave (EM) toward the top layer of the structure due to its 4-fold structural symmetry. The designed structure offers stable absorption up to 60 incident angle under TE polarization and 40 incident angle under TM polarization. The structure is~λ/55.9 thin and maintains periodicity of~λ/21.7; thereby validating the effective homogeneity condition in the sub-wavelength domain. This graphene-based absorber can find several applications including, sensors, detectors, spatial light modulators, and in spectroscopic detectors, and so forth, in the "Terahertz Gap" for next-generation 5G communication system and beyond.

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“…In order to achieve polarization control through compact structures, researchers have shifted their focus towards meatasurfaces. In this regard, broadband linear polarization rotators have been reported in the recent literature at microwave frequencies [12]- [16]. Highly efficient transparent 90 • polarization rotator is achieved based on U-shaped periodic array using combined chirality and tunneling that operates over frequency range of 9.8-12.5 GHz [17].…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Single Layer Metasurface Based on Hexagonal Split Ring Resonator

et al. 2020

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We present a single-layer metasurface, which performs both cross and circular polarization conversion at multiple frequency bands. The unit cell of the proposed metasurface consists of periodic array of a uniquely designed hexagonal split ring resonator (SRR). The proposed metasurface behaves as an efficient 90 • polarization rotator at dual frequency bands of 6.36-6.59 GHz and 10.54-13.56 GHz. The polarization conversion efficiency approaches 90% within these two operating bands. Moreover, linear-tocircular polarization conversion is also achieved in other three wide frequency bands from 6.10-6.20 GHz, 6.84-9.02 GHz and 14.10-15.48 GHz. The novel features of the subject hexagonal metasurface, which qualify it for numerous practical applications are high cross-polarization conversion (CPC) efficiency, wideband operation and angular stability for oblique incidence up to 45 • .

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A Wideband Cross Polarization Conversion Using Metasurface

Cited by 67 publications

References 24 publications

Design and experimental analysis of dual-band polarization converting metasurface for microwave applications

Design and experimental analysis of dual-band polarization converting metasurface for microwave applications

Graphene based metasurface with near unity broadband absorption in the terahertz gap

Multifunctional Single Layer Metasurface Based on Hexagonal Split Ring Resonator

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