Theoretical Analyses and Design of Circular Array to Generate Orbital Angular Momentum

Lin, Mingtuan; Gao, Yue; Liu, Peiguo; Liu, Jibin

doi:10.1109/tap.2017.2700160

Cited by 63 publications

(11 citation statements)

References 22 publications

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“…In practice, UCAAs can be used in different forms of antennas, such as dipole antennas [2], [8], Vivaldi antennas [37], horn antennas [38], Yagi antennas [39], and microstrip patch antennas [40], [41]. In addition to UCAAs, radio OAM generation with imperfect uniform circular arrays (IUCAs) has also be discussed in [42]. In [43] a circular time switched array (TSA) is employed to generate vortex electromagnetic waves.…”

Section: B Radio Oammentioning

confidence: 99%

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Chen

Zhou

Moretti

et al. 2020

IEEE Commun. Surv. Tutorials

251

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Orbital angular momentum (OAM) has aroused a widespread interest in many fields, especially in telecommunications due to its potential for unleashing new capacity in the severely congested spectrum of commercial communication systems. Beams carrying OAM have a helical phase front and a field strength with a singularity along the axial center, which can be used for information transmission, imaging and particle manipulation. The number of orthogonal OAM modes in a single beam is theoretically infinite and each mode is an element of a complete orthogonal basis that can be employed for multiplexing different signals, thus greatly improving the spectrum efficiency. In this paper, we comprehensively summarize and compare the methods for generation and detection of optical OAM, radio OAM and acoustic OAM. Then, we represent the applications and technical challenges of OAM in communications, including free-space optical communications, optical fiber communications, radio communications and acoustic communications. To complete our survey, we also discuss the state of art of particle manipulation and target imaging with OAM beams.

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Section: B Radio Oammentioning

confidence: 99%

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Chen

Zhou

Moretti

et al. 2020

IEEE Commun. Surv. Tutorials

251

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show abstract

“…Besides, it may be applied for radar target imaging with the potential to acquire the cross-range profile of the target [4], [5]. To realize the generation of OAM carrying vortex beams, antennas have been designed using spiral phase modulation [6], [7] and spatial sampling of a continuous circular aperture [8]- [10]. Also, dielectric resonator antennas and travelling wave antennas can be employed to produce twisted radio beams with specific topological modes [11], [12].…”

Section: Introductionmentioning

confidence: 99%

An OAM-Mode Reconfigurable Array Antenna With Polarization Agility

Kang

Zhou

et al. 2020

IEEE Access

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An Orbital angular momentum (OAM) antenna with both mode reconfigurability and polarization agility is proposed in this paper. The proposed antenna is designed based on a four-element uniform circular array with a phase-shifting reconfigurable feed network. To reduce its dimensions and complexity, the feed work is constructed with two stages of single-pole double-throw switches and a stage of 90 • phase-shifting power dividers, partially of which can be shared among the chosen operating states. Moreover, the use of a small amount of p-i-n diodes as binary switches allows low insertion loss and low component cost. By varying the ON/OFF status of the diodes strategically, the resultant array can be reconfigured to horizontal polarization (HP) or vertical polarization (VP), along with OAM mode l = −1 or +1 achieved for each polarization. The antenna performance is evaluated in terms of reflection coefficients, near-field distributions and far field radiation patterns. According to the measured results, the antenna exhibits an overlapped frequency band ranging from 2.29 to 2.59 GHz among the different operating states. Meanwhile, stable radiation patterns as well as high cross-polarization discrimination can be obtained. Benefiting from the above features, the antenna could help to improve the signal quality and increase the channel capacity in wireless communications.INDEX TERMS Orbital angular momentum, mode reconfigurability, polarization agility, reconfigurable feed network.

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“…Other defects include dark regions around the main axial and large dimensions of aperture sizes. Usually the former may cause a pretty obvious reduction in transmission efficiency and hence make it difficult to find modes of OAM waves in a long distance 9 ; the latter means not economic because reportedly it was as large as 20 λ , where λ denotes the wavelength in free space 10 …”

Section: Introductionmentioning

confidence: 99%

A compact OAM antenna for generating CP radiation patterns of three modes by using half‐mode SIWs

Qiu

et al. 2020

Micro & Optical Tech Letters

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Based on a uniformly sequential rotational array, this study proposes a compact orbital angular momentum (OAM) antenna, for generating circularly polarized radiation patterns of three modes. The antenna consists of four half-mode substrate integrated waveguides and has a diameter of one wavelength in free space. Both the simulation and the measurement results show that the proposed antenna can generate AE1 OAM modes with circularly polarized radiation patterns with a gain of 9.2 dBi. The antenna can also generate 0 OAM mode with a conic radiation pattern with a gain of 7.0 dBi. The compact OAM antenna with three modes can be applied in multiplex systems with strict requirements on aperture dimensions.

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Theoretical Analyses and Design of Circular Array to Generate Orbital Angular Momentum

Cited by 63 publications

References 22 publications

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

An OAM-Mode Reconfigurable Array Antenna With Polarization Agility

A compact OAM antenna for generating CP radiation patterns of three modes by using half‐mode SIWs

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