Rao, B. V. ., S. . Panda, and J. . Suri. “Design and Characterization of Microstrip Patch Antenna Using Octagonal EBG Periodic Structures”. Helix - The Scientific Explorer | Peer Reviewed Bimonthly International Journal, vol. 11, no. 6, Dec. 2021, pp. 1-8, https://helixscientific.pub/index.php/home/article/view/376.