EFFECT OF DGS ON CHARACTERISTICS OF RECTANGULAR MICROSTRIP PATCH ANTENNA

Amar B. Kachare, Mahesh.S.Mathpati

Abstract: The need of multiband, larger gain and low profile antennas to support multiple wireless applications led to the design of Microstrip antennas. Microstrip antennas due to their small profile design take less area. Further they can be modified by two techniques that are introducing defect in ground plane and adding layers to the conducting surface in order to improve its gain, VSWR, bandwidth, return loss and directivity. This paper presents the changes in the above characteristics of micostrip patch antenna with addition of defect and different shape of defects. The proposed antenna is simulated on Duroid substrate with dielectric constant of 2.2 and fed with 50 ohms microstrip line using HFSS software. By introducing the defect in the ground plane and changing its shape the corresponding changes in the characteristics have been noted for 2.4GHz of resonant frequency.

Keywords: Microstrip patch antenna; Defected ground structure

DOI: https://doi.org/10.15623/ijret.2015.0417017