The High Gain Rectangular Microstrip Patch Array Antenna for UHF-band Microsatellite Application

The Oo Lwin (Department of Space Systems Engineering,Myanmar Aerospace Engineering University, Meiktila, Myanmar)
Aung Myo Thu (Department of Space Systems Engineering,Myanmar Aerospace Engineering University, Meiktila, Myanmar)
Aung Ko Wynn (Department of Space Systems Engineering,Myanmar Aerospace Engineering University, Meiktila, Myanmar)

The Indonesian Journal of Computer Science
Vol. 15 No. 1 (2026): The Indonesian Journal of Computer Science

A UHF-band microsatellite receiving antenna requires high gain to support short-range communication between the ground station and satellite. This paper presents a microstrtip array antenna with a 2×1 rectangular patch element configuration using a microstrip line feeding technique. The array enhcances gain and directivity by employing a two-element planar design.Additionally, corner truncation on the patch and an 8mm thick substrate improve performance. The antenna is fabricated on Rogers RT 5880 dielectric material with a relative permittivity of 2.2 and a loss tangent of 0.0009. Copper is used for the patch and ground plane. The design is simulated and optimized using CST Microwave Studio. Simulation results show a return loss of -19.11dB and a VSWR of 1.2 at 410MHz. The antenna achieves a realized gain of 9.45 dB, indicating it is effective and sutibla for UHF-band microsatellite applications.