Ahmad Mustafa, A. M., S. Mohamad, N. F. Abdul Malek, F. N. Mohd. Isa, and I. M. Rafiqul. “A Wideband Circularly-Polarized Spiral Antenna for CubeSat Application”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 10, no. 1-8, Feb. 2018, pp. 17-20, https://jtec.utem.edu.my/jtec/article/view/3727.