CPW-fed UWB slot antenna with cross like tuning stub

A Novel coplanar waveguide (CPW) fed Ultra Wideband (UWB) slot antenna is presented in this paper. The antenna consist a rectangular slot with cross type structure as a tuning stub with CPW feed. The CPW feed is designed for 50 Ω impedance. The physical size of the proposed antenna is 19 mm(L)×20mm(W)×1.6mm(T) and the electrical size is 0.43λ_r × 0.45λ_r respectively. The characteristics of the designed structure are investigated by using MoM based electromagnetic solver, IE3D. Detailed simulation results of the proposed antenna are presented in this paper. The antenna was fabricated using FR4 substrate and the return loss is measured which is comparable with the simulation results. The impedance bandwidth of the proposed antenna is ranged from 4.8 GHz to 12.8 GHz has a fractional bandwidth of 90% with return loss better than -10 dB (VSWR<;;2). The simple configuration with low profile of the proposed antenna leads to easy fabrication and can be built in any wireless UWB device applications.