Stacked tri-band microstrip patch antenna

Shared aperture multiband antenna has more application when the electromagnetic compatibility problem is more and more serious. This paper proposes a novel stacked tri-band antenna which has three independent ports. Many dual band compact microstrip patch antenna has been designed but the research about tri-band microstrip antenna which can work in L, S and C band was little. To obtain tri-band operation, a stacked four layers of microstrip antenna working at different frequency is presented. Each of them is fed by dual feed probes. The simulated results show that the antenna can work at L band 1.66GHz, S band 3.25GHz and C band 5.27GHz with high isolation. The proposed antenna has achieved a bandwidth of 3%, 3% and 18% at each band, respectively.