You-Feng Cheng, Xiao Ding, Wei Shao, and Cheng Liao. “A Novel Beam-Steerable Antenna Using HIS-SWG Reconfigurable Artificial Ground Structure”. The Applied Computational Electromagnetics Society Journal (ACES) 34, no. 01 (July 16, 2021): 107–114. Accessed May 6, 2024. https://journals.riverpublishers.com/index.php/ACES/article/view/8751.