Generation of OAM radio beams with modified uniform circular array antenna

Yuan, Tiezhu; Cheng, Yongqiang; Wang, Hongqiang; Qin, Yuliang

doi:10.1049/el.2016.0269

Cited by 25 publications

(10 citation statements)

References 9 publications

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“…(9)- (10) with additional noise to the numerator and denominator in Eqs. (9)- (10). Matlab is used for computation.…”

Section: Numerical Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

Tang¹,

Bai²,

Guo³

2017

PIER C

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Abstract-This paper studies the application of vortex wave with orbital angular momentum (OAM) in the radar. The vortex waves can have eigenstates or modes with different integer topological charges, which are orthogonal to each other. The eigenstates with topological charges of 0, −1 and 1 were utilized in this paper. The radar transmitted the pulse with topological charge of 0 and received echoes with topological charges of 0, −1 and 1. The receiver can process the signals received by these orthogonal modes to obtain the azimuth and elevation angles of the two targets in a same range gate. Compared with the traditional mono-pulse radar only with sum beam and difference beam, this vortex-wave-based radar can track two targets in principle. This is meaningful for the application of the vortex wave.

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“…(9)- (10) with additional noise to the numerator and denominator in Eqs. (9)- (10). Matlab is used for computation.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The OAM-carrying wave can be generated by a parabolic dish antenna, spiral reflector, perforated dielectrics lens antenna, and UCAA [5][6][7][8][9][10]. For convenience and without loss of generality in principle, the following analysis is based on UCAA method to generate OAM radio wave [8].…”

Section: The Oam-carrying Vortex Wave Generated By Ucaamentioning

confidence: 99%

Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

Tang¹,

Bai²,

Guo³

2017

PIER C

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“…When switches are used, the mode number increases with the harmonic of the switching frequency. In an analogous manner, the mode number can be tuned as a function of frequency if the position of the antenna elements is laid out on a helical path [23]. Such an approach has relevance in adding elevation discrimination to radar, but may need additional development to support efficient multiplexing.…”

Section: Uniform Circular Arraymentioning

confidence: 99%

How orbital angular momentum modes are boosting the performance of radio links

Drysdale

Allen

Stevens

et al. 2018

IET Microwaves, Antennas & Propagation

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This paper focuses on the application of orbital angular momentum (OAM) modes for enhancing radio communications. It is shown that OAM modes can enhance the spectral efficiency of line-of-sight links where there is limited or no diversity gain, and also increase physical layer security. Multiple-input multiple-output (MIMO) systems, in comparison, can struggle to give spectral efficiency improvements in line-of-sight links because they are not typically configured to exploit OAM modes. The concept of specifically using OAM modes shows great promise provided that several challenges are addressed. This paper aims to clarify OAM in the context of applications to which it is well suited, such as high capacity point-to-point links alongside transport infrastructure, within data centres, and between buildings.

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“…OAM beams have witnessed a tremendous amount of research activities in the past two decades owing to their intriguing unconventional properties and exciting potential applications [2]- [7]. Theoretical investigation and exploration of diversified applications of OAM beams have been extensively reported first in the optical regime [8], where they are referred to optical vortex beams, and subsequently in lower frequency domain like terahertz [9], millimeter wave [10], microwave [11] and radiofrequency band [12]. Among various novel applications of OAM beams, the capability of offering a brand-new mechanism of data multiplexing for high-capacity communications is probably the most fascinating one and has fueled widespread interests [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Broadband High-Efficiency Electromagnetic Orbital Angular Momentum Beam Generation Based on a Dielectric Metasurface

Lin

Wang

2020

IEEE Photonics J.

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Electromagnetic waves carrying orbital angular momentum (OAM) have motivated a wealth of applications. Achromatic or broadband OAM beams are preferred in many applications and have been extensively explored in previous research endeavors. In view of the low efficiency of the previous reported broadband OAM generators, this work proposes a metasurface composed of high-refractive-index dielectric resonators to achieve broadband OAM beam generation with high efficiency. An efficient method for designing the resonators is presented, which indicates that proper adjustment of the dimensions and rotation of the dielectric resonators can render broadband and high-efficiency full phase control. A broadband high-efficiency OAM generator is engineered based on the resonators from 18 to 28 GHz as a proof-of-concept example and validated by both simulation and experiments. Above 70% polarization conversion efficiency and above 65% operation efficiency are measured throughout the entire design band. Such structure provides an alternative mechanism for realizing broadband high-efficiency microwave, millimeter-wave, terahertz or optical OAM generation and can find potential applications in high-capacity communications and imaging.

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Generation of OAM radio beams with modified uniform circular array antenna

Cited by 25 publications

References 9 publications

Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

Bi-Target Tracking Based on Vortex Wave With Orbital Angular Momentum

How orbital angular momentum modes are boosting the performance of radio links

Broadband High-Efficiency Electromagnetic Orbital Angular Momentum Beam Generation Based on a Dielectric Metasurface

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