Study on microstrip line fed rectangular slot antenna for widen bandwidth

Abstract

The simple rectangular slot antenna fed by microstrip line is design and use as an original antenna for study on the various shapes of tuning stub for widen bandwidth. The tuning stub is design at the end of the microstsrip line on the other side of slot antenna. The shape and size of tuning stub will affect to the bandwidth, the adjustment parameters dimension of stub can achieve desirable bandwidth. The bandwidth of the original antenna without stub is 0.5 GHz from frequency range 2.24-2.74 GHz. In this paper, we proposed the four shapes of tuning stub for achieved either single widen bandwidth or dual widen bandwidth use in wireless communications. The bandwidth of slot antenna is expanded more than 1 GHz up to 7 GHz depend on the shape of tuning stub and its parameters. The simulated return loss and bandwidth can be obtained by using IE3D software.