Yudhotomo, U.S., Gunadi, G.I., Khaerudin, K. and Siahaan, T. 2023. 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, 1 (Jan. 2023), 447-456. DOI:https://doi.org/10.47814/ijssrr.v6i1.948.