Triple band microstrip patch antenna using defected ground plane

The proposed antenna design is a triple band microstrip patch antenna using defected ground structures that can support IMT, WLAN and Wi-MAX applications. The antenna design also aims at reduction in the size of the patch and operates at a center frequency of 5.5 GHz. The antenna is designed using a single layer glass epoxy substrate, having dielectric constant ε_r = 4.4 and loss tangent tan δ =0.02. The antenna is designed and simulated using IE3D software based on method of moments.