Li, Y., W. Li, C. Liu, and Qiubo Ye. 2021. “A Compact UWB Band-Pass Filter With Ultra-Narrow Tri-Notch-Band Characteristic”. Applied Computational Electromagnetics Society Journal (ACES) 29 (02):170-77. https://journals.riverpublishers.com/index.php/ACES/article/view/11085.