Active Metamaterial-Inspired Broad-Bandwidth, Efficient, Electrically Small Antennas

Active Metamaterial-Inspired Broad-Bandwidth, Efficient, Electrically Small Antennas

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...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters Vol. 10; pp. 1582 - 1585
Main Authors: Ning Zhu, Ziolkowski, R. W.
Format: Journal Article
Language:English
Published: IEEE 2011
Subjects:
Antenna bandwidth
Bandwidth
Broadband antennas
Capacitance
Dipole antennas
electrically small antennas (ESAs)
metamaterial-inspired antennas
negative impedance converter (NIC)
radiation efficiency
Resonant frequency
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Description
Summary: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 10 dB bandwidths that are more than 75 times their original values.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2012.2182981