Document Type
Article
Publication Date
1-1-2015
Abstract
Metamaterials are artificially engineered material having negative permittivity and permeability. Due to their negative constitutive parameters, metamaterials are capable of focusing incident electromagnetic energy called as beam focusing property. We have made use of beam focusing property of metamaterial to enhance antenna far-field gain. We have also conducted experimental study by varying the distance between patch antenna and metamaterial array to determine optimum distance. The distance is varied in seven steps of 35 mm. The far-field gain of antenna is increased by 4 dB when metamaterial is placed at 95 mm. The beamwidth of antenna reduces when loaded with metamaterial indicating beam sharpening. At 155 mm from patch antenna, the beamwidth reduces to 33.95 degrees and starts increasing as metamaterial is moved further away. The resonance frequency and bandwidth of antenna follows alternate increase and decrease pattern as the distance of metamaterial is increased, however, the impact is negligible. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:178-183, 2015
Keywords
Metamaterial, split ring resonator, gain enhancement, cls, microstrip patch, left-handed metamaterials, microstrip antenna
Divisions
fac_eng
Publication Title
Microwave and Optical Technology Letters
Volume
57
Issue
1
Additional Information
Au0hx Times Cited:0 Cited References Count:13