Analysis and modelling of the characteristics of telecommunication antennas utilising metamaterials with a circular structure Defrianto Defrianto ; Saktioto Saktioto ; Sofia Anita ; Siti Zahroh ; Yan Soerbakti ; Tengku Emrinaldi Komunikasi Fisika Indonesia 8 Sep 2026 10.31258/jkfi.21.3.233-238
