Si Li, Wenhua Yu, Atef Z. Elsherbeni, Wenxing Li, and Yunlong Mao. “A Varactor Loaded Tunable Dual-Band Left-Handed Metamaterial”. The Applied Computational Electromagnetics Society Journal (ACES) 34, no. 01 (July 16, 2021): 56–63. Accessed May 3, 2024. https://journals.riverpublishers.com/index.php/ACES/article/view/8739.