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

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Journal Article
IEEE Antennas and Wireless Propagation Letters, 2011, 10 pp. 1582 - 1585
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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. © 2006 IEEE.
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