Realizing complex beams via amplitude-phasedigital coding metasurfaces and semidefinite relaxation optimization

Abstract

Complex beams play important roles in wireless communications, radar, and satellites, and have attracted great interest in recent years. In light of this background, we present a fast and efficient approach to realize complex beams by using semidefinite relaxation (SDR) optimization and amplitude-phase digital coding metasurfaces. As the application examples of this approach, complex beam patterns with cosecant, flat-top, and double shapes are designed and verified using full-wave simulations and experimental measurements. The results show excellent main lobes and low-level side lobes and demonstrate the effectiveness of the approach. Compared with previous works, this approach can solve the complex beam-forming problem more rapidly and effectively. Therefore, the approach will be of great significance in the design of beam-forming systems in wireless applications.

Keywords

Antenna beams / Amplitude-phase coding metasurface / Far-field synthesis / Semidefinite relaxation

RIGHTS & PERMISSIONS

2023 Zhejiang University Press