Guellil, N., F. Djahli, and C. Zebiri. “A New Formula for the Optimum Width of Substrate Integrated Waveguide”. Advanced Electromagnetics 8, no. 4 (September 7, 2019): 39–43. Accessed October 28, 2025. https://www.aemjournal.org/index.php/AEM/article/view/1108.