A negative index metamaterial antenna for UWB microwave imaging applications

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this article, a negative index metamaterial antenna is presented for ultrawideband (UWB) microwave imaging applications. Four left-handed (LH) metamaterial (MTM unit cells are located along one axis of the antenna as the radiating element. Each left-handed metamaterial unit cell assembles a modified split-ring resonator with a capacitance-loaded strip to obtain a design architecture that at a time shows both negative permittivity and negative permeability, which assures the stable negative refractive index to raise the antenna performance for microwave imaging. The antenna structure of dimension 16 × 21 × 1.6 mm3 is printed on low dielectric FR4 material with a slotted ground plane and a microstrip feed. Measured reflection coefficient illustrates that this antenna attains 114.5% bandwidth covering the frequency band of 3.4-12.5 GHz for a voltage standing wave ratio less than 2 with a maximum gain 5.16 dBi at 10.15 GHz. There is a stable harmony between simulation and measured results and improved nearly omnidirectional radiation characteristics within the operational frequency band. The stable surface current distribution, negative refractive index characteristic, considerable gain, and radiation property have made this proposed negative index metamaterial antenna distinguishable for UWB microwave imaging applications.

Original languageEnglish
Pages (from-to)1352-1361
Number of pages10
JournalMicrowave and Optical Technology Letters
Volume57
Issue number6
DOIs
Publication statusPublished - 1 Jun 2015

Fingerprint

Metamaterial antennas
Ultra-wideband (UWB)
antennas
Microwaves
Antennas
Imaging techniques
microwaves
Metamaterials
Frequency bands
Refractive index
Radiation
Antenna grounds
Antenna feeders
refractivity
standing wave ratios
Resonators
Permittivity
Capacitance
radiation
current distribution

Keywords

  • Metamaterial
  • Microwave imaging
  • Negative index
  • Ultrawideband

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

A negative index metamaterial antenna for UWB microwave imaging applications. / Islam, M. M.; Islam, Mohammad Tariqul; Samsuzzaman, M.; Faruque, Mohammad Rashed Iqbal.

In: Microwave and Optical Technology Letters, Vol. 57, No. 6, 01.06.2015, p. 1352-1361.

Research output: Contribution to journalArticle

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