Design and measurements of an electrically small, broad bandwidth, non-Foster circuit-augmented protractor antenna

Ning Zhu; Richard W. Ziolkowski

doi:10.1063/1.4736996

Design and measurements of an electrically small, broad bandwidth, non-Foster circuit-augmented protractor antenna

Ning Zhu, Richard W. Ziolkowski

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

A broad bandwidth, electrically small, metamaterial-inspired protractor antenna was designed, fabricated and tested around 300 MHz. Its broad bandwidth property was achieved by augmenting the protractor-shaped near-field resonant parasitic (NFRP) element with a non-Foster circuit. The resulting active NFRP element provided the means to surpass the fundamental passive limits. The measurement results for this non-Foster protractor antenna showed more than a 10 times increase of the 10 dB fractional bandwidth (FBW _10dB) of the original passive version. The corresponding half-power bandwidth (BW _3dB) was more than 8.24 times the passive upper bound.

Original language	English (US)
Article number	024107
Journal	Applied Physics Letters
Volume	101
Issue number	2
DOIs	https://doi.org/10.1063/1.4736996
State	Published - Jul 9 2012

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4736996

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abstract = "A broad bandwidth, electrically small, metamaterial-inspired protractor antenna was designed, fabricated and tested around 300 MHz. Its broad bandwidth property was achieved by augmenting the protractor-shaped near-field resonant parasitic (NFRP) element with a non-Foster circuit. The resulting active NFRP element provided the means to surpass the fundamental passive limits. The measurement results for this non-Foster protractor antenna showed more than a 10 times increase of the 10 dB fractional bandwidth (FBW 10dB) of the original passive version. The corresponding half-power bandwidth (BW 3dB) was more than 8.24 times the passive upper bound.",

author = "Ning Zhu and Ziolkowski, {Richard W.}",

note = "Funding Information: This work was supported in part by NSF Contract No. ECCS-1126572. The authors would like to thank Dr. David Cox, ECE Department, University of Arizona, for his time and efforts in checking our circuit models and their stability and suggesting improvements in their experimental realizations. The authors would like to thank American Technical Ceramics Corp., Avago Tech., Coilcraft, Vishay, and Wurth Electronics for their generous donations of samples that made these experiments possible.",

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N2 - A broad bandwidth, electrically small, metamaterial-inspired protractor antenna was designed, fabricated and tested around 300 MHz. Its broad bandwidth property was achieved by augmenting the protractor-shaped near-field resonant parasitic (NFRP) element with a non-Foster circuit. The resulting active NFRP element provided the means to surpass the fundamental passive limits. The measurement results for this non-Foster protractor antenna showed more than a 10 times increase of the 10 dB fractional bandwidth (FBW 10dB) of the original passive version. The corresponding half-power bandwidth (BW 3dB) was more than 8.24 times the passive upper bound.

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Design and measurements of an electrically small, broad bandwidth, non-Foster circuit-augmented protractor antenna

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