Design of a Circular Disc Microstrip Antenna Loaded By Annular Ring. University of Thi-Qar Journal of Science, [S. l.], v. 4, n. 4, p. 7–11, 2014. DOI: 10.32792/utq/utjsci/v4i4.652. Disponível em: https://jsci.utq.edu.iq/index.php/main/article/view/652.. Acesso em: 3 dec. 2024.