IRJET - Compact Microstrip Antenna for Wlan Applications

A compact microstrip antenna with a circular patch placed on a semicircular patch is designed for WLAN applications using defected ground structure (DGS) technique. The antenna is simulated using HFSS software on an FR-4 substrate with dimensions of 50mmx50mmx1.6mm. With a half ground plane, the antenna achieves a return loss of -37.3653dB, bandwidth of 3.61GHz, VSWR of 1.0275, and impedance matching of 49.7713ohms. Compared to other designs, this proposed antenna has better return loss and bandwidth for WLAN frequencies.