Ellusamy, Sivakumar, and Ramachandran Balasubramanian. 2021. “Sub-6 GHz Quad-Band Reconfigurable Antenna for 5G Cognitive Radio Applications”. Applied Computational Electromagnetics Society Journal (ACES) 36 (08):1015-25. https://journals.riverpublishers.com/index.php/ACES/article/view/11765.