Yudhotomo, Unggul Satrio, Gathut Imam Gunadi, Khaerudin Khaerudin, and Timbul Siahaan. “2.22 GHz S-Band Helical Antenna Design for Earth Surveillance Lapan-Tubsat Data Acquisition in Indonesia Regional Security”. International Journal of Social Science Research and Review 6, no. 1 (January 6, 2023): 447-456. Accessed December 21, 2024. https://ijssrr.com/journal/article/view/948.