Zaidel, D., Attan, M., Sharip, M., Mat, D., Marzuki, A., Seman, N. and Then, Y. 2018. Improvement of the Bandwidth and Scattering Parameter Performances of 5G Branch-Line Coupler Design for the Use in Intelligent Transportation System (ITS). Journal of Telecommunication, Electronic and Computer Engineering (JTEC). 10, 1-12 (Mar. 2018), 89–92.