Abstract
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.
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