Gain Enhancement of Fractal Shape Antenna using Metamaterial Cover

Gain enhancement has attracted a great amount of attention in literatures. There were many ways, which were published to improve antenna gain. One of these ways is using Metamaterials. Materials that have negative refractive index are used to achieve this goal. These materials are artificial structures that exhibit characteristics not found in nature. Microstrip antennas covered by metamaterial are one of the interesting areas of study. Fractal shapes are used to improve antenna characteristics. Among these characteristics is antenna gain. In this paper fractal shape antenna is proposed and covered by new design of ring resonator to get enhancement in gain. The calculated result shows an enhancement in efficiency, gain, directivity and far field shapes. There is big agreement between simulation and measurements.