Analysis and Design for High-gain Antenna with Periodic Structures

Abstract — Unlike metal as conventional Perfect Electric Conductor (PEC) for unidirectional beam reflector, the periodic structures are now attracting more attention form academia and industrial as High Impedance Surface (HIS) or Artificial Magnetic Conductor (AMC) reflector. Because quarter wavelength (λ/4) separation between antenna and PEC reflector is needed for unidirectional beam applications, it inevitably increases the profile and stringently limits the op-eration bandwidth of the antenna system. However, the utilization of AMC of periodic structures as reflector not only significantly reduces the antenna profile with phase enhancement, but it will also enhance its gain and directivity performance. In this paper, we use monopole antenna with center frequency at 2.45GHz and design periodic structure operated in frequency range between 2.4GHz and 2.483GHz to investigate the applications of EBG structure on antenna. We will finally compare the simulated result and measured result to further predict the optimization of the antenna-EBG system design parameters. 1