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Rectangular Micro strip patch antenna with Defective Ground Structures (DGS) is proposed in this paper. The overall dimension of the antenna is (130*130*1.64) mm. The antenna produces resonance at 2.48 GHz, 4.01 GHz and 4.64 GHz which supports WLAN applications. The proposed antenna gives the reflection coefficient of -16.8dB, -36.94dB and -27.73dB respectively in simulation. The directivity values in simulation are 7.7dBi, 3.8dBi and 6.3dBi respectively. The antenna is designed using FR4 substrate with a dielectric constant value of 4.4. By using DGS, bandwidth is enhanced. The various parameters like reflection coefficient, directivity, bandwidth, radiation pattern are simulated using EM

Investigation of Placing Defective Ground Structures for Bandwidth Enhancement in Microstrip Patch Antennas