Ultra-Wideband antenna with WLAN and WiMAX band-notch characteristic

Abstract

This paper presents a symmetrical staircase design coplanar waveguide (CPW)-fed, Ultra-Wideband (UWB) antenna having measurements 40.0×30.0×1.60mm3 with 5.0GHz WLAN and 3.5 GHz WiMAX notch-band characteristic. In literature, only WLAN band is being notched, whereas, in our design, the WLAN, as well as WiMAX band, is being notched that has huge advantage in security aspect like jamming of 4G signals and broadband signals. The staircase pattern in the radiating patch of UWB antenna design, U-shaped slot resonator in the feed line and U-formed slot on the staircase patch are utilized to achieve the UWB, notch the 3.5GHz WiMAX band respectively. The frequency range for UWB systems approved by the FCC between 3.1 to 10.6 GHz will cause interference to the existing wireless communication systems, such as the IEEE 802.16 WiMAX system at 3.5 GHz (3.3–3.7 GHz) and the IEEE 802.11a wireless local area network (WLAN) system at 5 GHz (5.15–5.825 GHz). The proposed antenna has impedance bandwidth ranging from 2.00GHz–11GHz to cover UWB. GaAs substrate with dielectric constant of 12.9 and thickness of 1.6mm has been utilized to print the presented antenna.