A Π- Slot microstrip antenna with band rejection characteristics for ultrawideband applications

Abstract

Federal Communications Commission (FCC) revealed that a bandwidth of 7.5GHzfrom 3.1 to 10.6GHzis forUltraWideband(UWB)wireless communication. UWB is a rapidly advancing technology for high data rate wireless communication. The main challenge in UWB antenna design is achieving the very broad impedance bandwidth with compactness in size. The proposed antenna has the capability of operating between 1.1 and 11.8GHz. In this paper, a rectangular patch antenna is designed with truncated corners at the ground as well as at the patch. A Π-shaped slot is cut out from the patch to get the complete UWB. After that two equal size of slits on sides of the Π shape are cut out from the patch which dispends the WLAN. The proposed antenna uses Rogers RT/duroid substrate with a thickness of 1.6mm and relative permittivity of 2.2. The aperture coupled feed is used for excitation. The proposed antenna is simulated using HFSS 11 software.