Zainal Abidin, M., N. Mufit, M. Suaidi, and M. A.Rahim. “The Effect of Quarter-Wave Transformer Matching Network to the X-Circular Polarized Antenna”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 5, no. 1, June 2013, pp. 9-13, https://jtec.utem.edu.my/jtec/article/view/479.