The and plastic. They are usually arranged in

The demand for WiMAX technology is
going to increase due to it significant characteristics of large bit rate with
high speed and distance range in the field of telecommunications. In recent
years microstrip patch antennas have played a very important role in the
telecoms industry because of their unique characteristics of small size, light
weight low cost on mass production. They are easily etched on any PCB and will
also provide easy access for troubleshooting during design and development.
They also have drawbacks as narrow bandwidth, low gain, small directivity and
low efficiency due to dielectric losses and conductor losses. In order to
overcome the drawbacks a based metamaterial antennas are suitable for this

These antennas are made of engineering
materials designed to have properties that are not found in nature. These
materials(Metamaterials) are fabricated from assemblies of multiple elements
fashioned from composite materials such as; metal and plastic. They are usually
arranged in repeating patterns at a scale that are smaller than the wave
lengths of the phenomena they influence. Their shapes, size, geometry,
orientation and arrangement gives them their unique properties capable of
manipulating electromagnetic waves. Since the introduction of this technique, a
lot of researchers were interested in investigating these artificial materials.

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In this work the goal is to
miniaturize size of antenna dimension and improve bandwidth by comparing
dimension and the parameter of the conventional microstrip patch antenna and
antennas with square-shaped split ring metamaterial unit cells. Two rectangular
microstrip patch antennas with square-shaped split ring metamaterial unit cells
are designed. Antenna A consists of a double 5X5 square-shaped split ring
metamaterial and antenna B composed with a single 5X5 square-shaped split ring
metamaterial. The designed metamaterial unit cells are loaded on the ground
plane. The presence of square-shaped split ring metamaterial unit cells in the
proposed microstrip patch antennas are expected to improve the performance of
the antennas, miniaturize antenna dimension, improve bandwidth than the
conventional microstrip patch antenna and able to be applied in WiMAX




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