Wideband and high-order microwave vortex-beam launcher based on spoof surface plasmon polaritons

Zhang, Lei; Deng, Min; Li, Weiwen; Yang, Guang; Ye, Longfang

doi:10.1038/s41598-021-02749-3

Cited by 8 publications

(3 citation statements)

References 35 publications

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“…However, this approach requires a complex phase-shifted feed network. Although the annular traveling waves of a leaky-wave antenna based on spoof surface plasmon polaritons (SSPPs) can radiate high-order OAM waves, the size of this structure is excessively large [5]. The whispering gallery modes (WGMs) of dielectric resonators can be excited to generate helical-phase wavefronts [6,7].…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Antenna with OAM Mode Radiated by Ground Plane

Yang

Liu

2023

J. Electromagn. Eng. Sci

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Antennas that radiate orbital angular momentum (OAM) modes are usually large and have complex structures. In this paper, in combination with characteristic mode analysis, the ground plane is used as the OAM wave radiator. To excite degenerate modes of the ground plane with phase quadrature by using a single-fed structure, two bent metal strips with grounded ends are introduced around the rectangular ground plane, and a corner of one of the bent strips is set as the feeding point. For ground radiators, a first-order OAM mode is generated at the high-frequency end by synthesizing the degenerate modes. In case of the bent side strip, an inverted-F antenna that operates in the low-frequency mode is formed. This compact antenna has dual-band characteristics and facilitates simple feeding, which makes it suitable for mobile terminal applications.

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Section: Introductionmentioning

confidence: 99%

Dual-Band Antenna with OAM Mode Radiated by Ground Plane

Yang

Liu

2023

J. Electromagn. Eng. Sci

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“…In the past, SPPs were studied only in the visible or ultraviolet (UV) frequency band but in 2014 Pendry et al proposed a subwavelength structure consisting of square hole arrays to produce the dispersion analogous to the natural SPPs at microwave frequency; such an electromagnetic response is called the spoof SPPs. The concept of spoof SPPs helps to miniaturize the integrated circuits and enhance the field confinement, which helps in many potential applications in lasing, 2 filters, 3 waveguides, 4 devices, 5 and sensing, 6,7 and so on.…”

Section: Introductionmentioning

confidence: 99%

High Q‐factor anapole mode based on localized spoof surface plasmon polaritons

Ahmed

Qin

2022

Micro & Optical Tech Letters

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Recently, localized spoof surface plasmon polaritons (LSSPPs) have emerged as a new research frontier due to their unique properties and potential applications in integrated circuits. The toroidal dipole is a localized electromagnetic response different from electric and magnetic dipoles. Anapole is the nonradiating source produced by the interference between identical radiation patterns of toroidal and electric dipoles in the far field. This paper proposes a novel high Q-factor compact planar resonator consisting of split-ring resonators to support the LSSPPs anapole at microwave frequency, which shows an apparent nonradiating charge-current configuration. In simulation and measurement, we observe the nonradiating property of the anapole mode. Further, we demonstrate that the LSSPPs anapole resonance has the tunable property, which is very sensitive to structural changes. These might lead to potential applications in the design of plasmonic deformation sensors, cloaking, and absorbers.

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“…In this case, a complex feeding network is required. For high-order OAM modes, due to the large number of array elements and the large phase difference between adjacent cells, it is a considerable challenge to the design of the phase-shifted network [5][6][7][8] . Leaky-wave antennas based on spoof surface plasmon polaritons (SSPPs) can even generate OAM waves up to the 12th order with a wide bandwidth [9] .…”

Section: Introductionmentioning

confidence: 99%

Mode Purity Improvement of High‐Order Vortex Waves

Lin

Yang

et al. 2022

Chinese J of Electronics

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Vortex electromagnetic waves can carry orbital angular momentum (OAM) modes of different order number, which are mutually orthogonal. Communication technologies multiplexing different OAM topological charges have attracted extensive attention in improving spectrum utilization. In this regard, the efficient generation of OAM modes becomes a key issue. However, it is difficult to generate high‐order OAM modes by using a microstrip antenna with a simple structure, and the mode purity is usually not high. Methodologically, the OAM wave of a microstrip antenna is mostly achieved by synthesizing degenerate eigenmodes. In this paper, combined with eigenmode analysis, the construction of high‐order and high‐purity OAM mode microstrip antennas is carried out from the perspectives of radiating element, ground plane, and structural symmetry. For a regular hexagonal patch antenna of the 4th‐order OAM mode, the mode purity is improved from about 40% to over 80% by removing the inner conductor of the patch layer, using a circular ground plane, and adding lug patches on the outside. This method of improving mode purity through the analysis of mode significance and characteristic current distribution also has guiding significance for the design of other high‐order OAM mode patch antennas.

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Wideband and high-order microwave vortex-beam launcher based on spoof surface plasmon polaritons

Cited by 8 publications

References 35 publications

Dual-Band Antenna with OAM Mode Radiated by Ground Plane

Dual-Band Antenna with OAM Mode Radiated by Ground Plane

High Q‐factor anapole mode based on localized spoof surface plasmon polaritons

Mode Purity Improvement of High‐Order Vortex Waves

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