Design of X-Band Microstrip Antenna for Circularly Polarized Synthetic Aperture Radar (CP-SAR) System

Microstrip antenna is useful for radar applications, communication satellites, and various cellular wireless systems because of their advantages in small size, lightweight, and flexibility in the choice of polarization types. This study aims to design a circular polarization microstrip antenna that can be used in the Circularly Polarized Synthetic Aperture Radar (CP-SAR) system. This X-band microstrip antenna is used for satellite data communication. This satellite function as a monitoring tool for global land deformation. The X-Band microstrip antenna in this paper was designed and simulated using CST Studio Suite. The antenna design is using a double layer of RO4350B substrate. The frequency range of the antenna is 8.0 - 8.4 GHz. The simulation results show that parameters are according to specifications such as low return loss, high gain, directional radiation pattern, and circular polarization with an axial ratio of less than 3 dB.