Design, Simulation and Realization of S band Circular Polarization Microstrip Array Antenna

In this paper, a circular polarization single layer microstrip array antenna is proposed and the performances of the array antenna are confirmed experimentally. Sequential rotation technique has been applied on the array to obtain broad bandwidth in return loss and axial ratio performance. In addition to the above advantage, mutual coupling between elements has been reduced. Elements in array are elliptical shape patch that was implemented on a low loss RT duroid RO4003C substrate. The maximum gain of 4*4 antenna array is achieved about 15 dB. The microstrip array antenna was realized. Measurement result was compared with simulation results. The measured results demonstrate good agreement with simulated results.