Abstract
Antenna systems used in small spacecraft are a very important element of the spacecraft. The limited size and operating features of these devices adjust the development processes of subsystems for them. In this work, wire and microstrip antennas for small spacecraft will be modeled and studied. The software environment chosen for modeling was CST Microwave Studio, which allows modeling antennas and ultra-high-frequency devices as close to reality as possible. In this work, a wire dipole antenna operating at a frequency of 433 MHz and a microstrip antenna operating at a frequency of 2200 MHz will be simulated. The dimensions of the antenna will be selected according to calculations, materials will be selected as close as possible to those available to the authors. The results of the study will be useful for further prototyping and research of these antennas.