Shakib, M. N. ., M. . Moghavvemi, and W. N. L. . Mahadi. “Design of a Compact Planar Antenna for Ultra-Wideband Operation”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 30, no. 02, Aug. 2021, pp. 222-9, https://journals.riverpublishers.com/index.php/ACES/article/view/10669.