Beam Improvement Using Double-Stacked SIW-Typed Metalens and OAM Wavefront Reshaping Method

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Jun Hu
  • Shuzhen Zhao
  • Xianzhong Tian
  • Di Zhu
  • Huangyan Li
  • Wen Wu

Detail(s)

Original languageEnglish
Pages (from-to)2106-2110
Journal / PublicationIEEE Antennas and Wireless Propagation Letters
Volume23
Issue number7
Online published28 Mar 2024
Publication statusPublished - Jul 2024
Externally publishedYes

Abstract

The electromagnetic (EM) wave carrying orbital angular momentum (OAM) has a helical phase front and is hence called a vortex EM wave. This letter presents a theory on the manipulation of vortex waves using metalens with hyperbolic phase compensations. The influence of aperture size on gain and sidelobe levels is studied, and a spectral leakage arising from the truncated Bessel transform is elucidated. Guided by this theory, a cost-effective planar metalens using substrate-integrated waveguides is designed. This metalens consists of two stacked substrates, incorporating 13 by 13 meta-atoms arranged in concentric circular rings. Each meta-atom consists of four layers of double-open square slot patches with varying angles, two substrate-integrated waveguides, and an air gap. The measurement validates the proposed theories. Specifically, the divergence angle of mode −1 is reduced from 43.7° to 9.0°, and the gain is increased from 7.55 to 16 dBic. The lens has a bandwidth of 16%. © 2024 IEEE.

Research Area(s)

  • Antenna radiation patterns, Apertures, Bandwidth, circular polarization, Gain, Lenses, Metalens, orbital angular momentum, Structural beams, Substrates, vortex electromagnetic wave

Citation Format(s)

Beam Improvement Using Double-Stacked SIW-Typed Metalens and OAM Wavefront Reshaping Method. / Hu, Jun; Zhao, Shuzhen; Tian, Xianzhong et al.
In: IEEE Antennas and Wireless Propagation Letters, Vol. 23, No. 7, 07.2024, p. 2106-2110.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review