Wei Hu, Zhaoyang Tang, Lixue Zhou, and Yingzeng Yin. “Design of Planar Differential-Fed Antenna With Dual Band-Notched Characteristics for UWB Applications”. Applied Computational Electromagnetics Society Journal (ACES), vol. 32, no. 03, Aug. 2021, pp. 209-14, https://journals.riverpublishers.com/index.php/ACES/article/view/9699.