An UWB antenna design with dual band notched characteristic using U-shaped slots

Abstract

A rectangular and planar Ultra-wide band (UWB) antenna with dual band notched characteristic is proposed using two U-shaped slots on radiating patch is discussed and presented in this paper. The proposed design uses one inverted U-shaped slot inside another U Slot with beveled corners on the radiating microstrip patch antenna. In this design, microstrip fed is utilized along with partial ground plane. This antenna may be utilized for frequency ranging from 2.897 to 10.700 GHz with dual band notching ranging from 3.340 to 4.123 GHz and 4.564 to 6.372 GHz respectively. The VSWR is well below 2 for entire operating frequency range except for the two band rejections. The bandwidth of the proposed structure is nearly 5.212 GHz. This antenna may be utilized for applications in upper S band, C band, X band, RFID (6.6 to 7.1 GHz) ITU uplink satellite communication band (8.1–8.4 GHz) while rejecting 5.2/5.8 GHz WLAN, 3.5/5.5 GHz WiMAX and whole U-NII (Unlicensed National Information Infrastructure) (5.15 to 5.825 GHz) band. The parametric study of different parameters is discussed in detail for better return loss.