Dr.Ananth Kumar. “A Circularly Polarized Dual Band Antenna For Multilayer 5g Mobile Phone: A Systematic Review”. 2020. PalArch’s Journal of Archaeology of Egypt / Egyptology, vol. 17, no. 7, Jan. 2021, pp. 9926 -41, https://archives.palarch.nl/index.php/jae/article/view/4026.