Abstract:
The wired local area network is becoming wireless day by day. The
allocation of frequency spectrum for this Wireless LAN is different in different
countries. This presents a myriad of exciting opportunities and challenges for design
in the communications arena, including antenna design. The high speed WLAN has
many standards and most antennas available do not cover all the standards.
The objective in thesis is to design a suitable antenna that can be used for
high speed WLAN application. The primary goal is to design antenna with smallest
possible size and better polarization that covers all the high speed WLAN standards
ranging from from 4.90 GHz to 5.82 GHz.
Many works are going on throughout the world in field of antenna designing.
Recent works on this field is studied in this thesis to find out most suitable antenna
shape for the specific application. Zeland’s IE3D simulation software has been used
to design and simulate antenna for WLAN frequency band. A parametric study has
been presented in process to the designed antenna for an effective bandwidth of 4.9-
5.825 GHz. Return loss -10 dB or lower is taken as acceptable limit.
Finally single E shape microstrip patch antenna having a dimension of 24×19
mm2 is demonstrated with a frequency band of 4.89 GHz to 5.83 GHz. The antenna
presents a good current distribution and radiation pattern for all four standards of
WLAN that falls inside this frequency range.
