A Novel Design of Dual Band-Notched Slot Antenna Using a Pair of Γ-Shaped Protruded Strips for UWB Applications

摘要

In this paper, we present a novel design of dual band-notch printed slot antenna for UWB applications. The antenna consists of a square radiating stub and a ground plane structure with an H-shaped slot and a pair of T-shaped strips protruded inside rectangular slot, which provides a wide usable fractional bandwidth of more than 145% (2.49 GHz - 15.73 GHz). In order to increase the impedance bandwidth of the ordinary slot antenna, we use an H-shaped slot in the ground plane, through which an UWB frequency range can be achieved. Additionally, by using a protruded Γ-shaped strip in the top edge of the rectangular slot a single frequency band-stop performance can be achieved, also in order to create the second notch frequency, we insert the second protruded Γ-shaped strip in the bottom edge of the rectangular slot. Simulated and measured results obtained for this antenna show that the proposed slot antenna offers two notched bands, covering all the 5.2/5.8 GHz WLAN, 3.5/5.5 GHz WiMAX and 4 GHz C-band range. The antenna has a small dimension of 20×20 mm~2.