CPW fed Rectangular Shape Microstrip Patch Antenna with DGS for WLAN/WiMAX Application

This paper presents CPW fed rectangular shape microstrip patch antenna with Defected Ground Structure that generate wideband bandwidth to cover WLAN/WiMAX bands simultaneously. The antenna was designed on a low-cost, durable FR4 substrate, which is reinforced with a woven fiberglass material. The proposed antenna mainly consists of rectangular shape patch embedded with rectangular slit on substrate and circular shape defect is created to form defected ground structure. Proposed antenna generate impedance bandwidth of 3.78 GHz 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(3.4-3.69 GHz) and 5.5 GHz (5.25-5.85 GHz). The soft nature of the DGS facilitates improvement in the performance of microstrip antennas. The design and optimization of DGS Antenna along with parametric study were carried out using ZELAND IE3D which is based on method of moment