A triple-band substrate integrated waveguide antenna based on metamaterials

In this paper, a triple-band substrate integrated waveguide(SIW) antenna is presented. The proposed antenna consists of a T-shaped radiator, where it is etched on the top side of the common dielectric substrate and fed by a substrate integrated waveguide(SIW) feed-line. Embedded in the E-plane of the antenna are two arrays of zero-index matamaterials (ZIM) unit-cells whose purpose is to effectively confine the electromagnetic waves in the end-fire direction to achieve triple-band characteristics. By properly optimizing the antenna dimensions, the impedance bandwidth(S11<;-10 dB) is 3.08 GHz (23.09-26.17 GHz), 3.49 GHz (27.62-31.11 GHz) and 2.20 GHz (31.81-34.47 GHz) around 24 GHz, 29 GHz and 33 GHz respectively.