Dong Tao, He Jingwen, He Xinyu, Xu Yue, Zhou Jianming
Opt Lett. 2022 Feb 15;47(4):806-809. doi: 10.1364/OL.449369.
In this paper, an optical phased array (OPA) with wide beam steering angle and low side-lobe level is designed based on the hybrid approach of particle swarm optimization (PSO) and convex optimization (CVX). The optimization process is divided into two steps. First, the antenna spacing distribution of the OPA is designed to obtain a wide beam steering range by using a PSO algorithm. Second, based on the antenna spacing distribution obtained in the previous step, the CVX algorithm is used to obtain the excitation amplitude and phase distribution of the OPA under different beam steering angles. By using this approach, we design an OPA with 1024 antennas. The beam steering range of the OPA is ±60° and the side-lobe level is reduced to -24.65 dB.
本文基于粒子群优化（PSO）和凸优化（CVX）的混合方法，设计了一种具有宽波束转向角和低旁瓣电平的光学相控阵（OPA）。优化过程分为两步。首先，利用PSO算法设计OPA的天线间距分布，以获得宽波束转向范围。其次，基于上一步得到的天线间距分布，使用CVX算法获得不同波束转向角下OPA的激励幅度和相位分布。通过这种方法，我们设计了一种具有1024个天线的OPA。该OPA的波束转向范围为±60°，旁瓣电平降低到-24.65 dB。
