International Research Journal of Engineering and Technology (IRJET)
In this paper, the authors are to use Defected Ground Structure (DGS) in micro strip antennas at microwave frequencies. The DGS structures are introduced to improve the performance of planar array antenna in terms of return loss, gain, directivity and antenna efficiency. The array of two by two (2x2) planar array antenna with inset feed technique based on quarter wave impedance matching is designed and simulated using IE3D software. The proposed design consists of a triangular shaped DGS. The simulated results shows that the proposed array antenna has gain of 6.43dBi, directivity of 6.55dBi, antenna efficiency of 97.28 and return loss of -17.86dB at 2.5GHz.