These days, there is a very large demand by the end user
for integrated wireless digital applications. Antennas which
are used in these applications should be low profile, light
weight, low volume and broad bandwidth [1]. To meet these
requirements, microstrip antenna is preferred. According to
C. A.Balanis [2], an antenna should be low-profile,
comfortable to planar and nonplanar surfaces, simple and
inexpensive to manufacture, mechanically robust when
mounted on rigid surfaces. When the particular patch shape
and mode are selected they are very versatile in terms of
resonant frequency, polarization, pattern and impedance.
According to work done by M.A.R Osman [3], although
microstrip single antenna has several advantages, it also has
several disadvantages such as low gain, narrow bandwidth
with low efficiency. These disadvantages can be overcome
by constructing many patch antennas in array configuration.