Rama, S. R. B. ., and D. . Vakula. “Optimized Polygonal Slit Rectangular Patch Antenna With Defective Ground Structure for Wireless Applications”. The Applied Computational Electromagnetics Society Journal (ACES), vol. 30, no. 11, Aug. 2021, pp. 1194-9, https://journals.riverpublishers.com/index.php/ACES/article/view/10337.