Vortex Beam Generation in Microwave Band

Qasem, Ahmad Alamayreh and Nidal

doi:10.2528/pierc20082006

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…In addition, a new and promising resource for spectrum efficiency hinges on Allen et al's [11] discovery in the early 1990s of orthogonal Orbital Angular Momentum (OAM) orders possessed by electromagnetic waves. Since then, there has been significant interest in the application of OAM for optics [12] and, recently, for radio communications [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Relay Networks Based on the OAM Technique for 5G Applications

Alkhawatrah¹,

Alamayreh²,

Qasem³

2023

Computer Systems Science and Engineering

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Orbital Angular Momentum (OAM) is an intrinsic property of electromagnetic waves. Great research has been witnessed in the last decades aiming at exploiting the OAM wave property in different areas in radio and optics. One promising area of particular interest is to enhance the efficiency of the available communications spectrum. However, adopting OAM-based solutions is not priceless as these suffer from wave divergence especially when the OAM order is high. This shall limit the practical communications distance, especially in the radio regime. In this paper, we propose a cooperative OAM relaying system consisting of a source, relay, and destination. Relays help the source to transmit packets to the destination by providing an alternative connection between source and destination. This cooperative solution aims on the one hand, through best-path selection, on increasing the communications range. On the other hand, through the parallel transmission orders allowed by OAM carrying waves, the system could raise its total transmission throughput. Simulation results show that combining a cooperative relay with OAM improves the system throughput compared to using each element separately. In addition, the proposed cooperative relaying OAM outperforms the cooperative relaying non-orthogonal multiple access scheme, which is a key spectrally efficient technique used in 5G technology.

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Section: Introductionmentioning

confidence: 99%

Cooperative Relay Networks Based on the OAM Technique for 5G Applications

Alkhawatrah¹,

Alamayreh²,

Qasem³

2023

Computer Systems Science and Engineering

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“…Recently, [11][12][13] proposed a method for beam steering based on the Orbital Angular Momentum (OAM) features of electromagnetic waves. Various methods for generating OAM-carrying waves have been documented [14][15][16], and their propagation properties have been studied thus far [17]. Such waves are usually used in a variety of applications in addition to beam steering, such as cooperative OAM relaying systems [18], improving the spectrum efficiency of communications systems [19], and highresolution imaging [20].…”

Section: Introductionmentioning

confidence: 99%

Improved Beam Steering Method Using OAM Waves

Qasem¹,

Alamayreh²

2023

Computer Systems Science and Engineering

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Orbital Angular Momentum (OAM) is an intrinsic feature of electromagnetic waves which has recently found many applications in several areas in radio and optics. In this paper, we use OAM wave characteristics to present a simple method for beam steering over both elevation and azimuth planes. The design overcomes some limitations of traditional steering methods, such as limited dynamic range of steering, the design complexity, bulky size of the steering structure, the limited bandwidth of operation, and low gain. Based on OAM wave characteristics, the proposed steering method avoids design complexities by adopting a simple method for generating the OAM-carrying waves. The waves are generated by an array of Planar Circular Dipole (PCD) elements. These elements are designed to cover a wide bandwidth range between 3 and 30 GHz. The transmitting array shows an enhanced gain value from 8.5 dBi to almost 11.5 dBi at the broadside angle. Besides the enhanced PCD-based OAM generation, the novelty of the design lies in a new method of beam steering. Beam steering is then performed by controlling the electrical feeding of the PCD elements; the beam azimuthal location is managed by turning off some of the PCD elements, while the elevation is determined by changing the gradient phase of excitation for the turned-on PCD elements. Detailed analysis of the steering method is carried out by finding the mathematical model of the system and the generated waves. The performance has been verified through numerical simulators.

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“…Recent developments in radio communications systems have drawn the attention of many academics and researchers in the area of orbital angular momentum (OAM) applications [1,2]. The role of capacity in various applications is critical, namely mobile communications [3,4], radar [5][6][7], and satellite communications [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Improved Side-lobe Suppression by Optimizing the Beam Synthetization in Uniform Circular Arrays for OAM Generation

Abogneem¹,

Alamayreh²,

Qasem³

2023

PIER M

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Enhancing the capacity of wireless communications systems is necessary to manage growing networks. Thus, this work presents an analytical model for describing the deterioration in orbital angular momentum (OAM). The proposed model is based on a uniform circular array, which can be applied in OAM generation to obtain the desired beam properties. First, the side-lobe problem in OAM applications is examined and resolved by optimizing the beam synthetization. Then, comparisons between the two window techniques are used to evaluate their impacts. Finally, the effects of selecting the optimal window technique and width on the solutions are investigated. Numerical results and the comparisons between derived formulas and those obtained via full-wave numerical simulations are shown.

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Vortex Beam Generation in Microwave Band

Cited by 5 publications

References 27 publications

Cooperative Relay Networks Based on the OAM Technique for 5G Applications

Cooperative Relay Networks Based on the OAM Technique for 5G Applications

Improved Beam Steering Method Using OAM Waves

Improved Side-lobe Suppression by Optimizing the Beam Synthetization in Uniform Circular Arrays for OAM Generation

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