Konhar, D., and D. Mishra. “Circularly Polarized Antenna Design Using Microstrip-To-CPW Transition for Ultra-Wideband Applications”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), vol. 9, no. 3, Sept. 2017, pp. 193-7, https://jtec.utem.edu.my/jtec/article/view/1566.