Abstract
This paper presents a novel electromagnetic bandgap (EBG) structure composed of stacked U-shaped 3-D lattice of metallic open square rings and its potential application to selected waveguide configurations. Five key geometrical parameters are shown to impact the bandgap and modal structure of the EBG. Using this insight, we demonstrate two different configurations for line defect that realize guiding through the structure at Ku-band. The proposed EBG structure overcomes the fabrication complexity of conventional 2-D EBGs that are composed of dielectric rods or holes in a dielectric material. Selected EBG waveguide configurations with transitions to conventional microwave guiding structures are fabricated and tested.
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