Frequency tunable electromagnetic metamaterial using ferroelectric loaded split rings
Open Access
- 15 March 2008
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 103 (6)
- https://doi.org/10.1063/1.2898575
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 140 MHz band centered at 1.75 GHz . 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 0 to 5 V . The permeability of the slab can tune between positive and negative values, making it useful in applications requiring a state switchable magnetic permeabilityKeywords
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