Jiang, D. ., B. . Yan, and R. . Xu. “Ultra-Wideband Modified CSRR Antenna With Reconfigurable Notch Band”. Applied Computational Electromagnetics Society Journal (ACES), vol. 28, no. 07, Oct. 2021, pp. 614-9, https://journals.riverpublishers.com/index.php/ACES/article/view/11527.