Chen, C.-M. , Chang, S.-J. , Zheng, .J.-C. , Liou, J.-C. and Yang, .C.-F. 2021. Using Folded Open-Loop Ring Resonator to Design a Common-Mode Suppression and Frequency Adjustable Balun-Bandpass Filter. Applied Computational Electromagnetics Society Journal (ACES). 31, 01 (Aug. 2021), 45–51.