Design and Analysis of Cpw Fed Microstrip Patch Antenna with Dgs for Wireless Applications

Abstract

In this paper a design of compact size microstrip antenna is presented that have its applications in WLAN/WiMAX frequency range. The ground element of the proposed antenna is taken in the form of defected ground structure(DGS). The antenna is fed by a Coplanar Waveguide (CPW) feeding technique and printed on a dielectric Fr4 substrate of dimension (36mm X 22 mm X 1.6 mm) permittivity ?r =4.4 and height h = 1.6 mm. The optimization on the microstrip antenna has been done to accomplish an -10 dB return loss criterion. . The proposed antenna is composed with regular pentagon shape patch embedded with rectangular slot and the triangular shaped defect in the ground plane. The aim is to use defected ground structure (DGS) CPW fed microstrip antennas for wireless communication that generate bandwidth of 3.02 GHz for upper band to cover IEEE 802.11 WLAN standard in the band at 5.2 GHz (5.15- 5.35 GHz) and 5.8 GHz (5.72-5.82 GHz) and WiMAX standard in the band at 3.5 GHz (3.4-3.69GHz) and 5.5 GHz (5.25-5.85 GHz). The design and optimization of DGS structures along with the parametric study were carried out by using IE3D ZELAND which is based on method of moment