Beam Steering of Orbital Angular Momentum Vortex Waves With Spherical Conformal Array

Yu, Shixing; Kou, Na; Jiang, Jiheng; Ding, Zhao; Zhang, Zhengping

doi:10.1109/lawp.2021.3076804

Cited by 19 publications

(7 citation statements)

References 25 publications

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“…Te array beam facilitates fexible scanning by controlling the excitation phase of each element. Te authors in reference [24] present a detailed derivation of the excitation phase formula for general CPAs. As an example, in the H-plane scanning case, the excitation phase of the four elements in the cross-sections shown in Figure 7(d) can be expressed as…”

Section: Experiments Of the Conformal Arraymentioning

confidence: 99%

A Conformal Phased Array with Low Profile and Wide-Scanning Performance for SAR Application

Tang,

Lu,

et al. 2023

International Journal of Antennas and Propagation

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A low-profile wide-scanning conformal phased array (CPA), with cavity-backed stacked patch elements, is presented in this paper. To reduce the array profile, a partially dielectric-filled cavity is employed in each element, and to enhance its scanning performance, the cavity walls are deliberately modified. Finally, the designed element operates in a frequency band of 1.45∼1.75 GHz, with a profile of 0.086 λh (λh is the free-space wavelength at 1.75 GHz), and achieves ±60° scanning in the E/H-planes, with the reflection coefficient below −7 dB. The proposed design method and all numerical results are experimentally verified by a 4 × 4 CPA prototype.

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Section: Experiments Of the Conformal Arraymentioning

confidence: 99%

A Conformal Phased Array with Low Profile and Wide-Scanning Performance for SAR Application

Tang,

Lu,

et al. 2023

International Journal of Antennas and Propagation

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“…Array antennas can also generate different modes of OAM by controlling the phase change. Currently, various phased array antennas have been proposed to generate OAM, such as patch array [ 7 ], circular ring phased array [ 8 ], and microstrip patch phased array [ 9 , 10 ]. According to the mechanism of generating OAM, these antennas are designed with a phase-shifted feed network.…”

Section: Introductionmentioning

confidence: 99%

“…OAM antennas are numerous, and but they can be classified into two categories: scalar beam generation systems and vector beam generation systems. The former works by introducing additional spatial phase factors

to traditional scalar antenna systems, as described in [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. The latter functions by combining some cylindrical vector modes [ 14 , 15 , 16 ] to generate non-zero OAM topological charges, as shown in [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

A Millimeter-Wave Broadband Multi-Mode Substrate-Integrated Gap Waveguide Traveling-Wave Antenna with Orbit Angular Momentum

Lin,

Hou,

Wang

et al. 2024

Sensors

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Orbit angular momentum (OAM) has been considered a new dimension for improving channel capacity in recent years. In this paper, a millimeter-wave broadband multi-mode waveguide traveling-wave antenna with OAM is proposed by innovatively utilizing the transmitted electromagnetic waves (EMWs) characteristic of substrate-integrated gap waveguides (SIGWs) to introduce phase delay, resulting in coupling to the radiate units with a phase jump. Nine “L”-shaped slot radiate elements are cut in a circular order at a certain angle on the SIGW to generate spin angular momentum (SAM) and OAM. To generate more OAM modes and match the antenna, four “Π”-shaped slot radiate units with a 90° relationship to each other are designed in this circular array. The simulation results show that the antenna operates at 28 GHz, with a −10 dB fractional bandwidth (FBW) = 35.7%, ranging from 25.50 to 35.85 GHz and a VSWR ≤ 1.5 dB from 28.60 to 32.0 GHz and 28.60 to 32.0 GHz. The antenna radiates a linear polarization (LP) mode with a gain of 9.3 dBi at 34.0~37.2 GHz, a l = 2 SAM–OAM (i.e., circular polarization OAM (CP–OAM)) mode with 8.04 dBi at 25.90~28.08 GHz, a l = 1 and l = 2 hybrid OAM mode with 5.7 dBi at 28.08~29.67 GHz, a SAM (i.e., left/right hand circular polarization (L/RHCP) mode with 4.6 dBi at 29.67~30.41 GHz, and a LP mode at 30.41~35.85 GHz. In addition, the waveguide transmits energy with a bandwidth ranging from 26.10 to 38.46 GHz. Within the in-band, only a quasi-TEM mode is transmitted with an energy transmission loss |S21| ≤ 2 dB.

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“…2,3 Besides communication, OAM-VW also shows great potential in radar application. 4,5 At present, the generations of OAM-VW at microwave bands include circular array antenna [6][7][8][9] circular traveling wave antenna 10,11 and metasurface antenna [12][13][14][15] et al It is no longer a difficulty to generate the OAM-VW. Nevertheless, the performance of the OAM-VW antenna still needs to be improved, including the radiation and scattering properties.…”

Section: Introductionmentioning

confidence: 99%

Dual‐mode dual‐polarization orbital angular momentum metasurface antenna with in‐band radar cross‐section reduction

Zhang¹,

He²,

Hong³

et al. 2022

Int J RF Mic Comp-Aid Eng

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In this paper, an orbital angular momentum (OAM) metasurface antenna is proposed. Based on the idea of controlling the radiation and scattering simultaneously, the metasurface unit cells play two roles of radiating and scattering energy. For radiation, the metasurface unit cells are excited by two carefully designed phase shift networks (PSNs) at two orthogonal directions. Thus, OAM vortex waves with topological charge l = ±1 are generated at 7.48 GHz band. For scattering, the incident wave is deflected through the phase canceling scheme due to the anisotropy property of the metasurface unit cells. As a result, the in‐band radar cross section is reduced. A prototype of the antenna was fabricated and measured. The measurement results agreed well with the simulations.

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Beam Steering of Orbital Angular Momentum Vortex Waves With Spherical Conformal Array

Cited by 19 publications

References 25 publications

A Conformal Phased Array with Low Profile and Wide-Scanning Performance for SAR Application

A Conformal Phased Array with Low Profile and Wide-Scanning Performance for SAR Application

A Millimeter-Wave Broadband Multi-Mode Substrate-Integrated Gap Waveguide Traveling-Wave Antenna with Orbit Angular Momentum

Dual‐mode dual‐polarization orbital angular momentum metasurface antenna with in‐band radar cross‐section reduction

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