Shallah, A. B., F. Zubir, M. K. A. Rahim, and Z. Yusoff. “A Symmetrical Fractal-Based Balanced Branch-Line Coupler for Simultaneous Low- and Mid-Band 5G Frequencies Applications”. Applied Computational Electromagnetics Society Journal (ACES), vol. 38, no. 12, Dec. 2023, pp. 965-74, doi:10.13052/2023.ACES.J.381206.