As one of important applications of metamaterials, the metamaterials-based antennas were introduced in this chapter.
Firstly, theoretical background regarding the antenna was given. Then two types plasmonic structures being used as antennas:
electromagnetic band-gap (EBG) structures-based antenna and waveguide slit array antenna were presented. Some experimental
results were demonstrated also. Some unique properties of the antennas were shown in terms of these results.
