Quarter-wavelength wideband slot antenna for 3-5 GHz mobile applications

In this letter, a quarter-wavelength ultra-wideband (UWB) slot antenna for 3-5 GHz mobile applications is proposed. Numerical results indicate that the performance of the antenna is insensitive to the size of the ground plane and an optimal performance of the antenna can be easily obtained by varying the dimensions of the slot and tuning stubs. Furthermore, a prototype of the antenna is made and a good agreement between simulation and measurement is achieved.