N. Ramya, M. Sujatha, T. Jayasankar, Prasad Jones Christydass. “Metamaterial Inspired Circular Antenna With DGS for Tetra Band Application”. International Journal of Control and Automation 13, no. 02 (April 25, 2020): 877 - 882. Accessed September 24, 2022. http://sersc.org/journals/index.php/IJCA/article/view/11689.