Generating orbital angular momentum based on circular antenna array with filtering characteristic

Lei, Ruiting; Li, Sirong; Yang, Yang; Liu, Baiyang; Zhang, Li

doi:10.1002/mmce.22714

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…Hence, the aperture efficiency of the proposed TA is better than the TAs in comparison. In addition, the PCB based TAs in [42,43] can realize gain full-metal 3D TA, due to the fact that the multi-order power divider and phase delay line result in a larger loss. The loss will be multiple accrual, especially for the high-gain array with a large aperture size.…”

Section: Fabrication and Measurement Of The Ta Prototypementioning

confidence: 99%

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Gain and mode purity filtering dual polarized OAM beam generation using cavity waveguide-based 3D transmitarray

Cao,

Zhang,

Yang

et al. 2024

J. Phys. D: Appl. Phys.

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A 3D transmitarray (TA) is proposed to generate dual-polarized orbital angular momentum (OAM) beams with gain and mode purity filtering responses. The TA units are realized by square cavity filters with the same passband and different orders and inner widths, resulting in different coupling cavity numbers. The evanescent modes in the coupling cavities will greatly decrease the propagation constant, thus generating a large phase variation. The square structure of the cavity filter makes it able to support dual-polarized wave propagation with the same phase delay and insert loss. Based on these transmission characteristics, eight different TA units are designed to realize a 3-bit phase gradient within the passband of 25.4 GHz to 26.7 GHz. It should be emphasized that the dispersed transmission phase and magnitude of the eight TA units in the stopbands will deteriorate the purity of the OAM beam. Therefore, the gain and mode purity filtering responses can be realized simultaneously. In order to verify the performance of the proposed OAM TA design, a TA prototype with the mode number l = -1 is fabricated by 3D printing technology. The TA can realize the maximum gain of 25.9 dB in the passband, and the rejection level is below –15.0 dB within the main beam direction. The purities of dual-polarized OAM beams are over 0.5 in the passband, and the cross-polarization is below –16.5 dB. The advantages of the OAM TA, including gain-filtering and mode purity-filtering responses, dual-polarization, and high efficiency make it a promising solution for millimeter-wave OAM sensing and communication applications.

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Section: Fabrication and Measurement Of The Ta Prototypementioning

confidence: 99%

“…To achieve OAM beams with gain-filtering response, several conventional OAM antenna designs are combined with various filters. In [42,43], two types of gain-filtering antenna are used as the units of a circular array. The antenna arrays can achieve OAM beams with around −15.0 dB rejection level.…”

Section: Introductionmentioning

confidence: 99%

Gain and mode purity filtering dual polarized OAM beam generation using cavity waveguide-based 3D transmitarray

Cao,

Zhang,

Yang

et al. 2024

J. Phys. D: Appl. Phys.

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show abstract

“…OAM is carried by EM waves, which have the helical phase factor of exp (ilϕ), where l is the OAM mode number and ϕ is the transverse azimuthal angle [13]. For SAM, the rotation of the E and H fields is around the main beam axis.…”

Section: Introductionmentioning

confidence: 99%

A Low-Profile Dielectric Resonator Antenna Array for OAM Waves Generation at 5G NR Bands

et al. 2023

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This paper presents the generation of orbital angular momentum (OAM) vortex waves with mode +1 using dielectric resonator antenna (DRA) array. The proposed antenna was designed and fabricated using FR-4 substrate to generate OAM mode +1 at 3.56 GHz (5G new radio band). The proposed antenna consists of 2 × 2 rectangular DRA array, a feeding network, and four cross slots etched on the ground plane. The proposed antenna succeeded in generating OAM waves; this was confirmed by the measured radiation pattern (2D polar form), simulated phase distribution, and intensity distribution. Moreover, mode purity analysis was carried out to verify the generation of OAM mode +1, and the purity obtained was 53.87%. The antenna operates from 3.2 to 3.66 GHz with a maximum gain of 7.3 dBi. Compared with previous designs, this proposed antenna is low-profile and easy to fabricate. In addition, the proposed antenna has a compact structure, wide bandwidth, high gain, and low losses, thus meeting the requirements of 5G NR applications.

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Generation of orbital angular momentum vortex beams with cylindrical and conical conformal array antennas

Jiang

Kou

et al. 2021

Int J RF Microw Comput Aided Eng

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In this article, cylindrical and conical conformal arrays are presented to flexibly launch the OAM vortex beams. First, we analyze the characteristics of OAM beams generated by planar annular arrays with different radii. Then characteristics of vortex waves generated by cylindrical and conical arrays with different curvatures are analyzed. Finally, prototypes of cylindrical and conical arrays are fabricated and measured. Experimental results imply that OAM vortex beams can be effectively generated by cylindrical and conical conformal phased arrays, which may provide a reference for electromagnetic vortex communication on the conformal carrier in the future.

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Generating orbital angular momentum based on circular antenna array with filtering characteristic

Cited by 9 publications

References 18 publications

Gain and mode purity filtering dual polarized OAM beam generation using cavity waveguide-based 3D transmitarray

Gain and mode purity filtering dual polarized OAM beam generation using cavity waveguide-based 3D transmitarray

A Low-Profile Dielectric Resonator Antenna Array for OAM Waves Generation at 5G NR Bands

Generation of orbital angular momentum vortex beams with cylindrical and conical conformal array antennas

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