Conical-Beam Circularly-Polarized Microstrip Antenna Array for Ceiling Mount Doppler Sensors. International Journal of Information and Electronics Engineering, [S. l.], v. 5, n. 2, p. 88–92, 2015. Disponível em: https://ijiee.org/index.php/ijiee/article/view/389. Acesso em: 30 jul. 2026.