Dual-Band Miniaturized Linear-to-Circular Metasurface Polarization Converter With Wideband and Wide-Angle Axial Ratio

Wang, Hong Bin; Cheng, Yu Jian; Chen, Zhi Ning

doi:10.1109/tap.2021.3083820

Cited by 46 publications

(12 citation statements)

References 34 publications

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“…In particular, high polarization isolation between the x-and y-polarizations should be guaranteed. This is achieved by adopting centrally connected elements such as classical or Jerusalem crosses [ 14 , 19 , 24 , 25 , 26 ] that have been widely used in these types of applications. Another important aspect is to guarantee a relative independence between the two bands.…”

Section: Design Of the Unit Cellmentioning

confidence: 99%

Dual-Frequency Linear-to-Circular Polarization Converter for Ka-Band Applications

Greco

Arnieri

2022

Sensors

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A dual-band linear-to-circular planar polarization converter based on a multilayer printed circuit board (PCB) is proposed and demonstrated. Each cell of the periodic surface is formed by six substrate layers separated by five foam spacers. The three top layers are identical and contain an ‘I’-type strip, while the three layers on the bottom side are realized with three identical Jerusalem crosses (JC). A linearly polarized (LP) wave tilted 45° relative to the x- and y-axis of the converter is used to illuminate the polarizer. In this configuration, right-handed circularly polarized (RHCP) waves are generated at the Ka-band while left-handed circularly polarized (LHCP) waves are generated at the K-band. An equivalent circuit model based on transmission lines is proposed and used to design the polarizer together with full-wave simulations. The simulated/measured axial ratio (AR) remains below 3 dB in the bands 19.4–21.8 GHz (12.5%) and 27.9–30.5 GHz (8.7%) with an insertion loss better than 0.5 dB.

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Section: Design Of the Unit Cellmentioning

confidence: 99%

Dual-Frequency Linear-to-Circular Polarization Converter for Ka-Band Applications

Greco

Arnieri

2022

Sensors

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“…Recently, many studies about the LP-to-CP converter at a single or dual-band of Ku-/Ka-band for millimeter-wave and satellite communication applications have been reported in [9]- [12]. The polarization converter is divided into two main categories: reflection polarization converter and transmission polarization converter.…”

Section: Introductionmentioning

confidence: 99%

A High Angular Stability, Single-Layer Transmission Linear-to-Circular Polarization Converter for Dual ISM-Band Operation

Seo

2023

IEEE Access

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This paper presents a planar metasurface structure for linear to circular polarization (CP) conversion at the industrial, scientific, and medical bands of 2.4 GHz and 5.8 GHz. The new unit-cell structure consists of two loaded symmetric cross-shaped stubs with a size of 0.26 λ × 0.26 λ in a single thin substrate with a thickness of 0.0064 λ. The design process and parametric study are presented to clarify the operating mechanism for each frequency. The unit-cell element is analyzed and simulated, which exhibits an axial ratio (AR) bandwidth of 15.8% and 12.6% at a 3-dB criterion with the same polarization mode at 2.4 GHz and 5.8 GHz, respectively. The proposed LP-to-CP converter achieves a stable AR bandwidth with an oblique incident angle up to 45 • . Moreover, a dual-band linear polarization (LP) antenna is combined with an array of 4 × 4 unit cells to validate the polarization converting ability of the proposed metasurface. The LP-to-CP converter and the antenna are fabricated and measured. The measurement results show that the antenna obtains a good impedance matching and CP waves radiation at 2.33-2.51 GHz and 5.55-5.89 GHz. The integrated antenna with dual-band CP waves radiation is suitable for improving the transmission efficiency in communication and wireless power transfer applications.

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“…[1][2][3] Metasurfaces consist of subwavelength metallic elements arranged on a periodic (or quasi-periodic) lattice or subwavelength apertures in a metallic sheet. These novel two-dimensional structures have been used recently for various applications such as controlling the polarization state of incident waves in the millimeter wave, [4,5] IR/optical, [6] propagating mode to surface mode conversion, [7] anomalous reflection, [8] reflectarray antennas, [9][10][11] absorbers, [12][13][14] highimpedance surface-based antennas, [15] reflectors, [16] transmitarrays, [17][18][19] and cloacking. [20,21] Furthermore, metasurfaces have been proposed that possess the capability to perform multiple functions, such as the independent control of horizontal and vertical polarizations for reflectarray or transmitarray applications [22] and/or amplitude and phase control.…”

Section: Introductionmentioning

confidence: 99%

Multifunction Tunable Piezoelectric‐Actuated Metasurface at Millimeter‐Waves

Vassos

Feresidis

2023

Advanced Photonics Research

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Free space (also termed quasi‐optical) metasurfaces have recently been designed and proposed as new types of polarizers that allow polarization control of an impinging wave in ways that are not possible with conventional designs. However, existing methods for tunable metasurface polarizers are not able to fully control the polarization dynamically; additionally, at mm‐wave and submillimeter bands, they typically suffer from high losses, which are predominantly produced by the inherent limitations of the tuning elements or materials. An electromechanically tunable reﬂection polariser that has the ability to fully control the polarization of an impinging wave has been designed, fabricated, and experimentally tested in a frequency band centered at 57 GHz. The proposed technique utilizes a variable air cavity between a periodic metasurface array and a ground plane, controlled by a piezoelectric actuator. The periodic metasurface element consists of two slightly different cross‐shaped metallic elements arranged in a periodic triangular lattice. Full‐wave simulations are presented and experimentally validated with measurements. The proposed approach is scalable from microwave up to THz frequencies with low‐loss performance due to the nature of the tuning technology whereby the tuning element is not interfering with the electromagnetic waves in the structure.

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Dual-Band Miniaturized Linear-to-Circular Metasurface Polarization Converter With Wideband and Wide-Angle Axial Ratio

Cited by 46 publications

References 34 publications

Dual-Frequency Linear-to-Circular Polarization Converter for Ka-Band Applications

Dual-Frequency Linear-to-Circular Polarization Converter for Ka-Band Applications

A High Angular Stability, Single-Layer Transmission Linear-to-Circular Polarization Converter for Dual ISM-Band Operation

Multifunction Tunable Piezoelectric‐Actuated Metasurface at Millimeter‐Waves

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