Jiang, D. ., Y. . Xu, and R. . Xu. “A Microstrip Printed Band-Notched UWB Antenna Using Modified CSRR Structure”. Applied Computational Electromagnetics Society Journal (ACES), vol. 28, no. 06, Oct. 2021, pp. 521-7, https://journals.riverpublishers.com/index.php/ACES/article/view/11551.