A novel metamaterial microstrip antenna of broadband and high-gain

Metamaterials represent a type of artificial electromagnetic materials and/or structures of unique electromagnetic characteristics that cannot be observed in nature materials. These characteristics, such as negative refraction, negative group velocity, band gaps and so on, hold good promise in practical applications. Metamaterial research still fails, however, to reshape the microwave industry due to its nature material drawbacks of narrow bandwidth and high loss in microwave frequency regime.