Antennas are one of the most critical components of a satellite system. The first thing to consider when approaching the topic is the frequency band that will be used for communication. Different frequency bands offer different benefits and limitations, and the choice will depend on the specific requirements of the mission. There are several types of satellite antennas, including parabolic dish antennas, patch antennas, and helical antennas, each with its own advantages and disadvantages. The choice of antenna type will depend on the specific requirements of the mission, such as the required data rate, antenna size, and power consumption. Antenna parameters, such as polarization, gain, and radiation pattern must also be considered. There are many environmental factors that may affect the antenna's performance as satellites operate in harsh environments, including extreme temperatures, radiation, and vibration, and the antenna must be designed to withstand these conditions.