MODELING AND MEASUREMENT OF ANTENNA CHARACTERISTICS OF A SATELLITE STATION BASED ON SOFTWARE-DEFINED RADIO

Baktybekov K.S. Ashurov A.E. Ivanov A.V. Kelgenbayev A.Z. Zhapanova A.S. Sailaubaiuly S.
29 December 2025 E.A. Buketov Karaganda University Publish house

Eurasian Physical Technical Journal
2025 #22 Issue 4 82 - 93 pp.

This study investigates the characteristics of a parabolic satellite antenna designed for communication with low Earth orbit satellites in the S-band. The choice of the S-band is motivated by the significantly lower power consumption of the radio link compared to the X-band. The S-band (2–4 GHz) is less sensitive to adverse weather effects than the X-band (8–12 GHz). These factors are critical for nanosatellites during Earth observation (EO) data transmission. Particular attention is given to measurements of the radiation pattern of the parabolic antenna in the S-band. These measurements provide essential data for optimizing the antenna design and parameters, thereby enhancing the overall efficiency of the communication system. During testing, both simulated and experimental radiation patterns of the gain were obtained, along with key antenna parameters such as Equivalent Isotopically Radiated Power, Input Power Flux Density, and the Gain-to-Noise Temperature Ratio. A comparison between measured and calculated results, including measurement accuracy and error budgets, demonstrated good agreement.

gain measurement , ground station , modeling , parabolic antenna , radiation pattern , S-band

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Payload and Research Department, Ghalam LLP, Astana, Kazakhstan
Department of Space Engineering and Technology, L.N. Gumilyov Eurasian National University, Astana, Kazakhstan
Electrical Test Department, AITC Ghalam LLP, Astana, Kazakhstan
Electrical test department, Ghalam LLP, Astana, Kazakhstan
Department of Radio Engineering, Electronics, and Telecommunications, S. Seifullin Kazakh Agrotechnical Research University, Astana, Kazakhstan
Nazarbayev University, Astana, Kazakhstan

Payload and Research Department
Department of Space Engineering and Technology
Electrical Test Department
Electrical test department
Department of Radio Engineering
Nazarbayev University

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