2021 IEEE 4th International Conference on Electronic Information and Communication Technology (ICEICT) | 2021
Wideband and Wide-Angle Millimeter-Wave Scanning Phased Array Based on Metasurface for 5G Applications
Abstract
A novel millimeter-wave (mmW) $4 \\times 4-$ element wide-angle scanning phased array based on metasurface for 5G applications is proposed. The elements adopt non-periodic metasurface to control the aperture field distribution, which broadens the element beamwidth and thus helps improve the scanning performance. The 10-dB impedance bandwidth of the $1 \\times 4-$ element subarray can cover the frequency band of 24.2529.5 GHz (20%), corresponding to the 5G mmW band. Based on the subarray, a $4 \\times 4$-element planar phased array with 1-D scanning capability is designed. Furthermore, a II-shaped structure is introduced between the subarrays to achieve a non-uniform aperture field on the array surface, further improving the element beamwidth along the scanning direction and leading to a wide scanning range. The simulated results show that, within the 5G mmW band, the proposed array produces a minimal gain of 15 dBi at the broadside direction and the antenna efficiency is over 75%. The proposed phased array can cover the scanning range from ± 55° with a gain fluctuation less than 3 dB, and the maximum scanning angle of ± 60°.