Design of microstrip antenna with ebg structure for UWB applications

In this paper a double L-slot Microstrip patch antenna with electromagnetic band-gap (EBG) is presented that have its applications in UWB frequency range. The antenna is fed by a microstrip feeding technique and printed on a dielectric FR4 substrate of dimension (31mm X 22 mm) permittivity ε_r =4.4. The optimization on the microstrip has been done to accomplish an -10 dB return loss criterion. Moreover, in comparison with a simple ground, the proposed design enhances the bandwidth, improves input return loss and efficiency. The antenna design parameters and performances have been investigated through a number of design simulations. With the use of EBG in microstrip antenna efficiency up-to 85% has been achieved.