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

2023, Volume 24, Issue 12

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Frontiers of Information Technology & Electronic Engineering >> 2023, Volume 24, Issue 12 doi: 10.1631/FITEE.2300146

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

1.State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China ;; 2.Peng Cheng Laboratory, Shenzhen 518055, China ;; 3.Pazhou Laboratory (Huangpu), Guangzhou 510555, China

Received: 2023-03-01 Accepted: 2024-01-24 Available online: 2024-01-24

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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 (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

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