Beam Improvement Using Double-Stacked SIW-Typed Metalens and OAM Wavefront Reshaping Method
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
---|---|
Pages (from-to) | 2106-2110 |
Journal / Publication | IEEE Antennas and Wireless Propagation Letters |
Volume | 23 |
Issue number | 7 |
Online published | 28 Mar 2024 |
Publication status | Published - Jul 2024 |
Externally published | Yes |
Link(s)
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.
In: IEEE Antennas and Wireless Propagation Letters, Vol. 23, No. 7, 07.2024, p. 2106-2110.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review