The 2 × 2 curved strip dipole antenna array on EBG reflector plane

This paper is presented the designation of array curved strip dipole antennas on mushroom-like electromagnetic band gap (EBG) reflector plane for the reader of the radio frequency identification (RFID) system. The proposed antenna consists of four strip dipoles that constructed of a metallic sheet and they were bended to be a half of annular with feed point at the center for yielding wider beamwidth. Furthermore, the resonant EBG technology has been used to be reflector for directive gain increment by utilizing the good performances of EBG structure, which is capable of providing a constructive image current within a certain frequency band. In this study, four difference lattice configurations of four curved strip dipole antennas are appropriated located horizontally on resonant EBG reflector plane that is simulated by CST Microwave studio 2009. The optimal designation of array antenna, the simulation beamwidth in Eand H-planes are 40.3 degree and 43 degree, respectively, frequency bandwidth is 2.30-2.85 GHz and directive gain is 13.2 dB at 2.45 GHz.