Defected Ground Structure Based Rectangular Microstrip Patch Antenna With Triple Band Operation

A simple defected ground microstrip patch antenna for three frequency bands is proposed. The novelty of the design leads to decrease in size of patch by using H-shaped DGS integrated with inverted L-DGS. Using this idea a three band patch antenna is designed that resonates at three frequencies 1.82, 2.4 and 5.52 GHz. Design and simulation of the proposed antenna is done using Computer Simulation Technology (CST) Microwave Studio 2012 Electromagnetic solver. Results obtained from CST reveal that the gain and return loss have almost doubled with previous reported results. Size of the main radiating element is also reduced by about 80.75 %. The bandwidth improvement in the proposed antenna is seen about 70.5%, 490.5 % and 377.25 % at 1.82, 2.4, 5.52 GHz respectively when compared with earlier reported results. The designed antenna can be used in communication applications involving IEEE 802.11 a/b/g/n bands and GSM 1.8 GHz band.