A tri-band circular patch microstrip antenna with different shapes in DGS for Ku and K applications

A tri-band circular patch microstrip antenna with different shapes in DGS is presented in this paper. The circular patch radiating microstrip antenna DGS techniques are combined. The proposed antenna consists of two inverted U shaped slots and a CPW feed with three distinct DGS shapes that are E-shaped, F-shaped and U-shaped. Due to these DGS, it enhances performance of the various parameters of circular patch microstrip antenna such as return loss (−38.15 dB), gain (6.32 dB), VSWR (<=2), and bandwidth (19%). This simulated antenna is useful for satellite communication, terrestrial microwave communication and radar communication especially speed detector for traffic police.