Li , Daotong, Yonghong Zhang, Kaida Xu, Kaijun Song, and Joshua Le-Wei Li. “Compact Wideband Bandpass Filter Using Improved Triple-Mode Resonator With Broad Upper Stopband”. Applied Computational Electromagnetics Society Journal (ACES) 30, no. 07 (August 22, 2021): 779–784. Accessed June 2, 2026. https://journals.riverpublishers.com/index.php/ACES/article/view/10481.