Rizka, Nadia, Ilfiyantri Intyas, and Samsurizal Rizal. “Butler Matrix 4x4 Untuk Aplikasi Wideband-Radar”. Journal of Informatics and Communication Technology (JICT) 1, no. 1 (October 1, 2019): 49 - 55. Accessed February 2, 2023. http://ejournal.akademitelkom.ac.id/j_ict/index.php/j_ict/article/view/28.