Radiocommunications emerged as a result of centuries of man's efforts to transmit news to greater distances than his senses and organs allow. Long-distanca communication is difficult to achieve without the transmission of electromagnetic energy. We can send energy through free space via transmission lines or using antennas. When it comes to communication over long distances, antennas have priority and the reason is because waves can move through free space, and we use antennas to transmit signals when this is not possible in other ways, e.g. communication via mountain terrain, satellites, rockets, etc. Antenna is easy to adjust for any purpose and it is possible to change different valuse of its parameters ( field strength, impedance, gain ) by changing the length and other dimensions. The paper describes the radio dana transmission in the SCADA system, the current situation, the planned technical solution for the Zadar Power Plant, which was implemented by HEP ODS d.o.o. . Calculations and characteristics of the antenna are presented, especially in the area of TS 35/10kV Ugljan – TS 10/0.4kV Kožino. The completion itself refers to the independent calculation required for the selection of antennas TS 35/10kV Ugljan – TS 10/0.4kV Kožino.