1. High-Efficiency Metalens Antenna Using Huygens’ Metasurface With Glide Symmetric I-Shape Metal Strips.
- Author
-
Lou, Qun, Xue, Chunhua, and Chen, Zhi Ning
- Subjects
- *
UNIT cell , *ANTENNAS (Electronics) , *MAGNETIC dipoles , *MAGNETIC resonance , *METAMATERIAL antennas , *METALS - Abstract
A Huygens’ metasurface with unit cells of glide symmetric I-shape metal strips is proposed for a high-efficiency metalens antenna. The proposed unit cell achieves more than 98.6% transmission amplitude with 360° phase shift coverage for dual polarization. The mechanism is presented by analyzing a unit cell with two dislocated I-shape metal strips, where the electric dipole and magnetic dipole resonances are tuned by the dislocation. The analysis implies that glide symmetric I-shape metal strips are preferable for high transmittance Huygens’ unit cell design. With the proposed Huygens’ unit cell, a high-efficiency metalens antenna is realized. The simulated and measured results show that the proposed metalens antenna of a 14-wavelength diameter achieves a maximum gain of 30.7 dBi at 27.2 GHz, which is only 1.1 dB lower than its theoretical limit. The maximum antenna efficiency is 61.5%. The 3-dB bandwidth of achieved gain ranges from 25.9 to 29 GHz, covering the fifth generation (5G) millimeter-wave bands. The proposed metalens remarkably enhances the radiation performance of the metalens antennas. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF