Design of Axial Mode Helix Antenna for Performance Improvement in LoRa 915 MHz Point to Point Communication Bloko Budi Rijadi, Agustini Rodiah Machdi, Aris Suryadi Jurnal Fokus Elektroda : Energi Listrik, Telekomunikasi, Komputer, Elektronika dan Kendali) Vol. 10 No. 3 2025 DOI 10.33772/jfe.v10i3.1043