Metamaterial Based Multiple Frequency Antenna

Antennas that are electrically small, efficient and have significant bandwidth would fill many needs of new generation communications systems if antenna engineers could reconcile these usually contradictory requirements. The introduction of the so-called metamaterials (MTMs), artificial materials which have engineered electromagnetic responses that are not readily available in nature, has provided an alternate design approach to obtain efficient electrically-small antenna (EESA)systems. A micro strip antenna based on metamaterial is proposed in this paper. The purpose of this work is to investigate the response of a small antenna enclosed in metamaterial. The new structure is useful in designing small antennas. Return loss less than -50 dB has been achieved at 2.426 GHz. Antenna also radiates at 1.24 GHz, 2.51 GHz and 2.95GHz effectively.