COBURN, W. . A Numerical Study of Coaxial Helical Antennas. Applied Computational Electromagnetics Society Journal (ACES), [S. l.], v. 25, n. 1, p. 61–68, 2022. Disponível em: https://journals.riverpublishers.com/index.php/ACES/article/view/15563. Acesso em: 8 may. 2026.