ORUGU, Rangarao.; GUNDAPANENI, Srilatha.; MARYLEENA, N; K.CHAITHANYA VARMA, A. Varying operating frequency of concentric circular ring patch antenna using high impedance surface. International Journal of Engineering & Technology, [S. l.], v. 7, n. 3.29, p. 57–60, 2018. DOI: 10.14419/ijet.v7i3.29.18461. Disponível em: https://sciencepubco.com/index.php/ijet/article/view/18461.. Acesso em: 24 nov. 2024.