Generating Concentrically Embedded Spatially Divided OAM Carrying Vortex Beams Using Transmitarrays

Shahmirzadi, Arash Valizade; Badamchi, Zahra; Badamchi, Bahareh; Subbaraman, Harish

doi:10.1109/tap.2021.3090860

Cited by 17 publications

(3 citation statements)

References 42 publications

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“…Different from reflectarrays, the transmitarray feed is located on the opposite side of the radiation, therefore eliminating the feed blockage. For the past few years, considerable research works on transmitarrays have been conducted for various applications and many interesting designs have been consequently proposed with impressive performance [1][2][3][4][5][6][7]. To realise a satisfactory transmission magnitude and phase, conventional transmitarray unit-cells are usually designed in a multi-layer structure, which is high-profile and complicates the fabrication of the antenna [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A dual‐layer polarisation rotating element for transmitarray designs

Rao,

Wang,

Guo

2023

IET Microwaves Antenna & Prop

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A transmitarray adopting dual-layer polarisation rotating (PR) elements is proposed. The element comprises a pair of perpendicularly placed C-shaped slots etched on the two sides of a single-layer substrate and orthogonally rotates transmission wave polarisation with regard to the incidence. By adjusting C-shaped slot's dimension as well as mirroring the bottom layer of the element, a 360°phase shift with a high transmission magnitude is achieved. Based on the proposed unit-cell, a dual-layer transmitarray composed of 529 elements is designed and developed. The experimental 1-dB gain bandwidth and peak aperture efficiency are 13% and 44% respectively. Furthermore, sidelobe level of 20 dB and cross polarisation level of 26 dB are obtained at 10 GHz. These promising properties demonstrate the superiority of the element for transmitarray designs. In addition, this element can be also a good candidate for folded transmitarray designs.

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Section: Introductionmentioning

confidence: 99%

A dual‐layer polarisation rotating element for transmitarray designs

Rao,

Wang,

Guo

2023

IET Microwaves Antenna & Prop

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“…The first theoretical OAM realization in radio frequency is via a uniform circular array [16], which was then experimentally validated through a seven-element array as well as a reflector [17], paving the way for the OAM radio communication. In the past decade, plenty of application designs for launching effective OAM vortex waves have been proposed [18][19][20][21][22][23][24][25][26], e.g. patch uniform circular array, traveling-wave antenna, spiral phase plate, dielectric resonator antenna [21], and reflect-and transmit-array.…”

Section: Introductionmentioning

confidence: 99%

Optically transparent anisotropic holographic impedance metasurface for launching orbital angular momentum vortex wave

Tang

Meng

Qian

et al. 2023

J. Phys. D: Appl. Phys.

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The visualization of electronic products is essential for the digitization and visualization of human-computer exchange in the future smart world. However, due to its large non-translucent aperture, the conventional hologram metasurface urgently needs transparency for wide scene usages. In this paper, an optically transparent holographic impedance metasurface with a low profile is investigated for generating orbital angular momentum vortex waves in the radio-frequency domain. Indium tin oxide is applied to perform the metal functionality, which is featured by high optical transparency, and polymethyl methacrylate is proposed as the substrate material in the meta-atom design. By virtue of classic optical metasurface theory and leaky-wave principle, holographic impedance mapping is achieved, so the surface wave generated by the monopole port is effectively converted into a radiating vortex wave. The prototype has been manufactured and fabricated, and the experiment results exhibit good agreements with theory and simulation analyses, showing a good prospect for orbital angular momentum vortex wave launch in visualized applications.

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“…Over the past decades, orbit angular momentum (OAM) for its nature of infinite orthogonal modes, quantum, and high resolution could be applied in expanding channel capacity, imaging, detecting spinning object. [1][2][3][4][5][6] OAM vortex beams with different function are generated, such as broadband, [7][8][9] dual-frequency, 10 high efficiency, 11 multimode, [12][13][14] mode-multiplexing, 15 modereconfigurability, 16 and so on. Beam-steering OAM waves can meet the need of real-time communication, vortex imaging and other fields.…”

Section: Introductionmentioning

confidence: 99%

Beam‐steering orbit angular momentum vortex waves by mechanically rotating transmitarray

Huang

Xie

2022

Int J RF Mic Comp-Aid Eng

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In this article, beam-steering orbit angular momentum (OAM) beams by mechanical rotating transmitarray, which is formed by three layer metasurfaces (MSs), is proposed. It is the first time to achieve steering OAM beams based on mechanical rotating transmitarray in microwave region. By mechanically rotating the middle and bottom MSs, different phase distributions are obtained, and then OAM beams in corresponding directions are generated.

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Generating Concentrically Embedded Spatially Divided OAM Carrying Vortex Beams Using Transmitarrays

Cited by 17 publications

References 42 publications

A dual‐layer polarisation rotating element for transmitarray designs

A dual‐layer polarisation rotating element for transmitarray designs

Optically transparent anisotropic holographic impedance metasurface for launching orbital angular momentum vortex wave

Beam‐steering orbit angular momentum vortex waves by mechanically rotating transmitarray

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