Abstract
This article analyzes the radiation principle of a slot-coupled hemispherical dielectric resonator antenna (DRA) integrated with a single-layer metamaterial (MTM) superstrate, investigating it both numerically and experimentally. It creates a compact high directive DRA incorporating MTM superstrate. The proposed MTM medium consists of broadside coupled planar E-shaped resonator periodic unit cell exhibiting low loss and a low refractive index over a broad frequency band. Measurements on fabricated prototypes to verify numerical results from full-wave simulations, and they show more than 6 dB increase in directivity of the DRA.
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