Active metamaterial-inspired broad-bandwidth, efficient, electrically small antennas

Ning Zhu, Richard W. Ziolkowski

Research output: Contribution to journalArticlepeer-review

78 Scopus citations


Realistic designs of broad-bandwidth metamaterial-inspired electric and magnetic antennas are characterized numerically. By augmenting their narrow bandwidth counterparts with internal non-Foster elements, active metamaterial unit cells are introduced as near-field resonant parasitic (NFRP) elements. The driven and NFRP elements in each presented case are designed to achieve nearly complete matching of the entire system to a 50-Ω source without any matching network and to yield high radiation efficiencies over their FBW 10dB bandwidths that are more than 75 times their original values.

Original languageEnglish (US)
Article number6123189
Pages (from-to)1582-1585
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2011
Externally publishedYes


  • Antenna bandwidth
  • broadband antennas
  • electrically small antennas (ESAs)
  • metamaterial-inspired antennas
  • negative impedance converter (NIC)
  • radiation efficiency

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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