Wang, Z. ., Z. . Chen, Z. . Tang, L. . Phav, and F. . Chen. “A Sector Ring Shape UWB Antenna by Tightly Coupling”. Applied Computational Electromagnetics Society Journal (ACES), vol. 38, no. 09, Sept. 2023, pp. 717-24, doi:10.13052/2023.ACES.J.380912.