Ultra-thin, wide-angle and bandwidth-enhanced linear and circular metasurface-based reflection-type polarization converter at X-band microwave frequency

Öztürk, Gökhan

doi:10.1080/09205071.2022.2029722

Cited by 13 publications

(6 citation statements)

References 27 publications

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“…Polarization is a key principal parameters of plane electromagnetic (EM) waves, which represents oscillation of electric field with time at a fixed point in space in microwave and terahertz frequency band applications [1,2]. Due to its essential role in various polarization sensitive implementations such as wireless communications, liquid crystal display, and antennas, a critical emphasis has long been placed on developing methodologies for supervising and managing the polarization of EM waves [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Cheaper, Wide-Band, Ultra-Thin, and Multi-Purpose Single-Layer Metasurface Polarization Converter Design for C-, X-, and Ku-Band Applications

Kaya

2023

Symmetry

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This article presents the design of wide-band, ultra-thin, and multi-purpose polarization converter utilizing metasurface for C-, X-, and Ku-band applications. Having a topology on a FR-4 substrate with metasurface metallic patterns on the front and an all-metallic surface finish on the back, the unit cell of converter design has symmetry in the x−y plane with unique features of having both linear polarization (LP) and circular polarization (CP) property. While the polarization conversion ratio (PCR) of converter in normal incidence case is more than 90% in three different frequency bands of 6.46–6.78 GHz, 10.52–11.85 GHz, and 16.49–17.37 GHz, it shows linear-to-linear polarization feature and a linear-to-circular polarization feature with left-handed circular polarization (LHCP) for the frequency range between 7.28 and 9.40 GHz and right-handed circular polarization (RHCP) for the frequency range between 13.38 and 15.19 GHz. It is also seen that the converter has a PCR value of around 90% for oblique incidence case with incidence angles up to 45°. Extensive simulations have been conducted to prove the performance of suggested converter with the aid of a commercially-available simulation platform, called CST Microwave Studio. The advantages of suggested polarization converter are low-cost, wide-band, ultra-thin, and having both LP and CP conversion in C-, X-, and Ku-bands.

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Section: Introductionmentioning

confidence: 99%

Cheaper, Wide-Band, Ultra-Thin, and Multi-Purpose Single-Layer Metasurface Polarization Converter Design for C-, X-, and Ku-Band Applications

Kaya

2023

Symmetry

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“…The unit‐cell had a comparable thickness of 0.06 λ . When assessing the relative BW, our design excels with the highest CPC RBW compared to other reported PCs [35, 37, 38, 44]. While other works, [41, 43], exhibit slightly larger CPC BW, ours is superior in size and polarisation conversion.…”

Section: Fabrication and Experimental Resultsmentioning

confidence: 74%

“…To delve deeper into our design's superiority, we evaluated the LTCP efficiency and type. While other multifunctional PCs generate either RHCP or LHCP waves [37, 41, 44], our structure stands out by producing both types of circularly polarised waves. Other studies achieved LHCP and RHCP generation [35, 42], with our RHCP efficiency comparable to theirs.…”

Section: Fabrication and Experimental Resultsmentioning

confidence: 95%

“…By contrast, our proposed PC is multifunctional, simultaneously producing both CPC and LTCP. Notably, most multifunctional PCs operate at higher frequencies, such as the X-band or above [35,37,38,43,44], with only a few achieving limited performance in the lower C-band. However, these merits often come at the cost of a lower CPC efficiency [41] or reduced CPC BW [42].…”

Section: Fabrication and Experimental Resultsmentioning

confidence: 99%

“…Besides, incident angle insensitivity was restricted to 30°, and the study did not analyse the LTCP type and efficiency [43]. In another recent study, a reduction in unit‐cell size and thickness was achieved, resulting in a significant reduction in BW, and the design only produced LHCP waves [44]. Thus, achieving wide BW, high conversion efficiency, the concurrent generation of LHCP and RHCP waves, and ensuring broad angular stability for both the CPC and LTCP polarisations in a single‐layer unit‐cell with minimised size and thickness are the central properties that remain as the foremost objectives for advancements in PCs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Metasurface-based broadband linear polarization converter with broad angular stability for X-band applications

Garg,

Choudhury,

Singhal

et al. 2024

Appl. Phys. A

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Ultra-thin, wide-angle and bandwidth-enhanced linear and circular metasurface-based reflection-type polarization converter at X-band microwave frequency

Cited by 13 publications

References 27 publications

Cheaper, Wide-Band, Ultra-Thin, and Multi-Purpose Single-Layer Metasurface Polarization Converter Design for C-, X-, and Ku-Band Applications

Cheaper, Wide-Band, Ultra-Thin, and Multi-Purpose Single-Layer Metasurface Polarization Converter Design for C-, X-, and Ku-Band Applications

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

Metasurface-based broadband linear polarization converter with broad angular stability for X-band applications

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