An effective metasurface-based linear and circular polarization converter for C- and X-band applications

Tutar, Fatih; Öztürk, Gökhan

doi:10.1016/j.optmat.2022.112355

Cited by 18 publications

(5 citation statements)

References 34 publications

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“…To meet these goals, efforts have been made to integrate both CPC and LTCP properties into a single-design assembly [35][36][37][38][39][40]. Pouyanfar et al introduced a PC incorporating the CPC and LTCP modes.…”

Section: Introductionmentioning

confidence: 99%

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A compact single‐layer reflective metasurface for high‐efficiency polarisation conversion applications in C and X bands

Raziul Islam,

Rahimian,

Machado

et al. 2024

IET Microwaves Antenna & Prop

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The authors design and experimentally analyse an anisotropic metasurface for the simultaneous conversions of linear cross and circular polarisations in the C and partial X bands. The proposed compact structure utilises a dual‐cut square‐ring resonator and a square patch on an FR4 substrate above a ground plane. The full‐wave simulations exhibit over 92% efficiency in cross‐conversion over a fractional bandwidth (BW) of 52.3%. The proposed metasurface efficiently converts linear to circular polarisation in two different bands, achieving left‐hand circularly polarised and right‐hand circularly polarised efficiencies exceeding 93% and 89%, respectively. The compact unit‐cell with dimension 0.22λ × 0.22λ attains stable polarisation transformation efficiency rates exceeding 80% up to 40° incident angles. The design is adaptable for efficient wide BW across both lower and higher (millimetre‐wave) frequencies through scaling. A prototype of the proposed polarisation converter (PC) was realised and validated effectively in measurements, aligning well with simulations. This PC features a novel and simple structure with multifunctional wideband operation, stable incident angle output, polarisation insensitivity, and scalability, making it an efficient front‐end for various radio frequency applications, including polarisation control and polarisation transformers.

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Section: Introductionmentioning

confidence: 99%

“…To meet these goals, efforts have been made to integrate both CPC and LTCP properties into a single‐design assembly [35–40]. Pouyanfar et al.…”

Section: Introductionmentioning

confidence: 99%

A compact single‐layer reflective metasurface for high‐efficiency polarisation conversion applications in C and X bands

Raziul Islam,

Rahimian,

Machado

et al. 2024

IET Microwaves Antenna & Prop

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“…M etasurface, a structure consisting of two-dimensional metamaterial units [1], has the benefits of a thin structure, easy fabrication, and flexible electromagnetic wave control [2,3], attracting great interest among researchers and scholars. It is feasible to alter the amplitude, phase, and polarization of electromagnetic waves by discretizing the parameter size of the unit structure [4][5][6]. In 2014, coded metasurfaces were proposed by Cui's group [7], analogizing the structure of units with different phase responses to a binary code.…”

Section: Introductionmentioning

confidence: 99%

Design of a Three-channel Frequency Multiplexing Metasurface in Full Space

Ling,

He,

Hao

et al. 2024

PIER M

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The multifunctional metasurface offers a high degree of flexibility in manipulating electromagnetic waves. However, the majority of its functions are limited to the reflection or transmission space in a single band, restricting the utilization of electromagnetic information. This paper proposes a three-channel multifunctional frequency multiplexing coding metasurface based on the Fabry-Perot cavity principle. It consists of two layers of orthogonal metal gratings and a cross-shaped, oblique open loop structure in the intermediate layer. Simulation results reveal that at an incidence of 22 GHz, the polarization conversion and focusing functions of the transmitted wave are accomplished. Similarly, at an incidence of 31 GHz, the beam deflection function of the reflected wave is observed. Furthermore, at an incidence of 32 GHz, the radar scattering cross-section reduction function of the reflected wave is achieved. In addition to achieving high efficiency, miniaturization, and compactness, the proposed metasurface effectively enhances the spatial utilization of electromagnetic information. As a result, potential applications in multifunctional integrated systems, including wireless communication, sensing technologies, and radar systems, are vast.

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“…RCS is a serious issue in military applications since stealth technology makes it difficult to be detected. However, other more techniques, including frequency selective surfaces, metamaterial absorbers, electromagnetic band gaps (EBG), etc., have been proposed in the literature to reduce RCS [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…The metasurface absorber (MSA) covers the frequency range 4-12GHz having more than 80% absorbance and wide 40 o polarization stability for electromagnetic interference and RCS reduction in stealth applications [1]. Faith Tutar, et.al [2] reflection mode metasurface based linear to circular polarization converter in C and X-band has been designed on FR-4 substrate with 2.8mm height. This metasurface also provides wide polarization stability up to 45 o and more than 80% polarization conversion ratio (PCR) in linear polarization scheme.…”

Section: Introductionmentioning

confidence: 99%

Metasurface Instrumented High Gain and Low RCS X-Band Circularly Polarized MIMO Antenna for IoT Over Satellite Application

Saxena¹,

Kumar²,

Chintakindi³

et al. 2023

Preprint

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In this article, an X-band metasurface is designed and this metasurface array is used as an instrument to increase gain & reduce radar cross section of circularly polarized X-band MIMO antenna through super-state and under-state positioning of array respectively. Absorbance of the metasurface to the intended frequency band (i.e., 6.75GHz-14.0GHz) is more than 90.0%. Metasurface is designed on FR-4 substrate height (Hs) 3.1mm with unit cell dimension of 7.95×7.95×3.1mm3 (0.265λo×0.265λo×0.103λo) at 10GHz. The proposed antenna is also designed on FR-4 substrate with dimensions of 29×23×1.6mm3 (0.966λo×0.766λo×0.0.053λo) at 10GHz. The super-state and under-state positioning of metasurface array over MIMO antenna is increased the gain (peak gain 12.6dBi at 11GHz) and reduced the mono-static RCS (18dBm2) across the band respectively. The characteristic of the antenna is likewise verified by its s-parameters, radiating efficiency, gain and diversity parameters for the intended band. The simulated & measured results are having better harmony which exhibits suitability of the proposed designs for IoT over satellite, military application, and also useful to identify blood clouting in CT-scan application.

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An effective metasurface-based linear and circular polarization converter for C- and X-band applications

Cited by 18 publications

References 34 publications

A compact single‐layer reflective metasurface for high‐efficiency polarisation conversion applications in C and X bands

A compact single‐layer reflective metasurface for high‐efficiency polarisation conversion applications in C and X bands

Design of a Three-channel Frequency Multiplexing Metasurface in Full Space

Metasurface Instrumented High Gain and Low RCS X-Band Circularly Polarized MIMO Antenna for IoT Over Satellite Application

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