Design of CPW Wide Slot Antenna with Tuning Stub for Wideband Applications

The conventional CPW fed rectangular slot antenna create dual narrow band. The single wideband antenna can obtain by using tuning stub. This paper describes a modified tuning stub of CPW fed rectangular slot antenna to achieve single wide bandwidth. The prototype of tuning stub is designed with several parameters, the significant modified by cutting on vertical narrow strips of tuning stub to achieve four different geometries. The comparison on the simulated return loss shows the bandwidth, the widest bandwidth with good matching is choosing. The wide slot antenna fed by coplanar waveguide (CPW) with tuning stub is designed on low cost substrate FR4 to achieve single wide bandwidth coverage standard of WLAN IEEE 802.11b/g/j/a/n (2.4 -2.4835 GHz, 4.9-5.1 GHz, 5.15-5.35 GHz, 5.7-5.9 GHz) and WiMAX (3.5 GHz) from frequency range 2.29-6.94 GHz.