Sulong, N. I., S. Mohamad, M. R. Islam, and N. F. Hasbullah. 2017. “A Modified PEC-Backed Spiral Antenna With Improved Pattern Symmetry”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 9 (3):33-36. https://jtec.utem.edu.my/jtec/article/view/1353.