Frequency tunable electromagnetic metamaterial using ferroelectric loaded split rings

descriptionPublicationkeyboard_double_arrow_right Article 15 Mar 2008 English Publisher:AIP PublishingJournal:Journal of Applied Physics, volume 103 (issn: 0021-8979, eissn: 1089-7550,

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Authors: Hand, Thomas H.; Cummer, Steven A.;

doi: 10.1063/1.2898575

Frequency tunable electromagnetic metamaterial using ferroelectric loaded split rings

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Abstract

Measurements of a frequency tunable magnetic metamaterial using metallic split rings loaded with barium strontium titanate thin film capacitors are presented. The resonant frequency of this medium is voltage tunable across a 140MHz band centered at 1.75GHz. S-parameter measurements in a microstrip waveguide reveal that the effective relative permeability of the slab has a roughly Lorentzian shape that reaches minimum values between −2 and −3 for biases from 0to5V. The permeability of the slab can tune between positive and negative values, making it useful in applications requiring a state switchable magnetic permeability.

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Duke University
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