Abstract: The concept of loading monopole antennas with composite right/left-handed (CRLH) unit cell is extended to cover other types of resonant antennas, namely loop antennas. The proposed structure consists of a Loop antenna loaded with a composite right/left-handed (CRLH) unit cell, operates at two narrow band 0.9 GHz, 1.57 GHz and one wide band around 2.6 GHz. It covers several communication standards. By adding one unit cell, these antennas achieve three operating bands while their sizes unmodified. The new frequencies are lower than the unloaded antenna’s nominal frequency.
Keywords: Composite right/left handed (CRLH) structure, Meta material, Loop antenna