Comparative Study on Bandwidth Enhancement Techniques of Microstrip Patch Antenna
No Thumbnail Available
Date
2008-01
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
Conventional microstrip antennas in general have the attractive features such as low
profile, light weight, easy fabrication, and conformability to mounting hosts. However,
microstrip antennas inherently have a narrow bandwidth, low gain, and bandwidth
enhancement is usually demanded for practical applications. In addition, applications in
present-day mobile communication systems usually require smaller antenna size in order
to meet the miniaturization requirements of mobile units. Thus, size reduction and
bandwidth enhancement are becoming major design considerations for practical
applications of microstrip antennas. For this reason, conducting studies to achieve
compact and broadband operations of microstrip antennas is thought to be very
important. The purpose of this thesis is to make a comparative study on the techniques
that help to overcome the bandwidth constraint of microstrip patch antennas and to
propose the better technique by taking different consideration such as the antenna gain,
bandwidth and related issues. In this thesis work broad banding techniques like using
feeding techniques (proximity coupled), stacked patches, parasitic arrangement of
patches and the use of different shapes (i.e. E-shaped) are studied. The bandwidth
obtained for each type of the antenna are 10.8%, 11.5%, 15.6% and 25.6% respectively
with respect to the operating frequency of each of the antennas. The result shows that the
E-shaped patch antenna has better performance.
Key Words: patch antenna, return loss, bandwidth, gain
Description
Keywords
patch antenna, Return loss, Bandwidth, Gain