AMC-Based Slotted Ground Circular Polarized Antenna for C-Band Satellite Communications

This article proposed a planar compact circular polarized (CP) slotted ground antenna for C-band satellite applications. CP antennas are well suited for satellite communication, where robust signal reception, resistance to interference, and efficient frequency utilization are essential. They contribute to reliable and high-quality communication links between ground-based terminals and satellites, supporting various applications, including broadcasting, telecommunication, remote sensing, and satellite-based navigation systems. The proposed antenna achieves CP features by circular stubs in the ground plane. The FR-4 substrate material with a dielectric constant of 4.3 is utilized to design the antenna, and the antenna size is 20 mm × 20 mm. A square ring-based artificial magnetic conductor (AMC) is designed, which has a reflection phase of 90° to 90° from 2.44 to 6.88 GHz. The utilization of AMC enhances the antenna gain by around 1.5 dBi. The proposed AMC-based antenna shows S11 < − 10 dB from 3.68 to 6.6 GHz and 3 dB > axial ratio from 3.90 to 4.15 GHz. The efficiency of the antenna also shows above 90% at the operating frequency. Finally, the compact size, high gain, and CP features make the proposed antenna for C-band satellite applications.