Yaqing Yu, Wen Jiang, Lv Qin, and Shuxi Gong. “Design of a Dielectric-Loaded Wide Beam Quad-Ridged Horn Antenna”. Applied Computational Electromagnetics Society Journal (ACES), vol. 35, no. 2, Feb. 2020, pp. 218-29, https://journals.riverpublishers.com/index.php/ACES/article/view/8003.