Design and realization of circular patch antenna for S-Band Coastal Radar

In this paper, a design and realization of a coastal radar antenna that works on S-Band frequency was presented. Type of antenna that had been used in this research is a microstrip patch antenna. One antenna module consist of eight patch that was horizontally arranged. The microstrip antenna had been fabricated using FR-4 epoxy substrate with 4.6 dielectric constant and a thickness of 1.6mm. Measured antenna acquires unidirectional radiation pattern, 16° beamwidth azimuth, 2.93 GHz - 3.093 GHz of operating frequency at Voltage Standing Wave Ratio (VSWR) ≤ 2; 166 MHz of bandwidth and Gain = 11.98 dB. There was a satisfactory agreement between simulation and measurement result. This circular patch antenna will be implemented for S-Band Coastal Radar.