Zhao, Shizhe, Xiuping Li, Yongxin Chen, Wenyu Zhao, and Zihang Qi. “A Wide-Beam Metasurface Antenna Using Pattern Combination of Characteristic Modes”. The Applied Computational Electromagnetics Society Journal (ACES) 37, no. 1 (May 4, 2022): 41–49. Accessed April 25, 2024. https://journals.riverpublishers.com/index.php/ACES/article/view/13229.