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DRA gain enhancement using a planar metamaterial superstrate
Author(s) -
Panda Asit K.,
Sahu Sudhakar,
Mishra Rabindra K.
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21445
Subject(s) - directivity , planar , metamaterial , materials science , optics , resonator , dielectric resonator antenna , broadside , dielectric , antenna (radio) , metamaterial antenna , refractive index , optoelectronics , dielectric resonator , radiation pattern , physics , telecommunications , slot antenna , computer science , computer graphics (images)
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.