Broadband impedance-matched near-zero-index metamaterials for a wide scanning phased array antenna design

Yahong Liu, Xin Zhou, Zhennan Zhu, Xiaopeng Zhao

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We present broadband near-zero-index metamaterials composed of dielectric resonators and metallic rods, whose permittivity ε and permeability μ are near-zero simultaneously. It is notable that the values of permittivity ε are equal to those of permeability μ over a broadband frequency range of 8.45 GHz to 10.5 GHz, indicating the impedances of the proposed near-zero-index metamaterials match vacuum in this broadband. The broadband near-zero-index metamaterials for manipulating radiation sources are analyzed. We also demonstrate numerically that such near-zero-index metamaterials can offer a unique grating condition in a phased array antenna, with the beam scanning angle range beyond the critical angle limit of the grating lobe.

Original languageEnglish
Article number075107
JournalJournal of Physics D: Applied Physics
Volume49
Issue number7
DOIs
StatePublished - 14 Jan 2016

Keywords

  • broadband
  • grating lobe
  • near-zero-index metamaterials
  • phased array antenna
  • radiation

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