Dual Band Microstrip Patch Antenna for WiMAX and WLAN Applications

Abstract

A  dual  band  microstrip  patch  antenna  has  been designed  for  technology  oriented  requirements  of  high  speed  wireless  local  area  networks  (IEEE  802.11a  standard)  and other  communications  systems  covering  the  5.15-5.825  GHz band.  Three  parallel  slots  have  been  introduced  in  the radiating  patch  to  get  the  maximum  current  distribution  on the  surface.  The  position  of  center  arm  is  set  to  get  the radiation pattern in desired  outward direction. The effects of various  dimensional  parameters  were  analyzed  to  get  the optimized  performance  of  the  presented  antenna.  FR-4 substrate  has  been  used  for  cost  estimation  whereas  size reduction  and  enhanced  gain  of  the  structure  was  another challenge.  To meet this challenge impedance is matched while maintaining the width of transmission line and also addition of slots is responsible for enhanced performance of antenna. The simulated results are good in agreement with measured results making antenna to be used for WiMAX and WLAN applications