Sungjun Yoo, Gangil Byun*, and Hosung Choo, “Design of a broad-band microstrip loop antennas with less-dispersive group velocity for accurate direction finding,” IET Microw. Antennas Propag., vol, 13, no. 14, pp. 2495-2500, Nov. 2019. DOI: 10.1049/iet-map.2019.0640