CST – Computer Simulation Technology

Broadband Near-Zero Index Metamaterials

Title:
Broadband near-zero index metamaterials
Author(s):
K Konstantinidis, A P Feresidis
Source:
IOP Publishing
Vol./Issue/Date:
1st January 0001
Year:
2016
Page(s):
pp 1 - 8
Keywords:
metasurfaces, near zero index, antennas
Abstract:
We present a new type of near-zero index (NZI) and epsilon near-zero (ENZ) metametarial with broad bandwidth characteristics. We propose an optimal geometry to manipulate the properties of the composite material and realize a metallic-dielectric NZI effective material operating at microwave frequencies with a broadband near-zero response. The effective material is composed by multiple layers of dissimilar metasurfaces of subwavelength dimensions. We emonstrate the broadband NZI metamaterial properties and study its anisotropy by realizing a radiating structure exhibiting broadband directive emission. An experimental demonstration validates the concept for an antenna in the microwave domain.
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