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Article Dans Une Revue Integrated Ferroelectrics Année : 2007

Characterization of ferroelectric films up to 60 GHz : application to phase shifters

Résumé

Paraelectric Ba0.5Sr0.5TiO3 films 0.3 μm thick have been deposited by sol-gel on c-axis sapphire substrates. They have been investigated from 1 kHz to 60 GHz using coplanar waveguide transmission lines and interdigitated capacitors. The dielectric constant εr is around 300 and the loss tangent is 0.16 at 50 GHz. The tunability is constant with frequency with a mean value of 42%. Analog phase shifters were subsequently fabricated. A 180° phase shift was obtained at 60 GHz with a 17 V bias. The maximum value of phase shift per decibel of insertion losses (at 0 V) is 13°/dB at 30 GHz with a bias of 30 V.
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Dates et versions

hal-00285627 , version 1 (06-06-2008)

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Gabriel Vélu, Ludovic Burgnies, Gregory Houzet, Karine Blary, Didier Lippens, et al.. Characterization of ferroelectric films up to 60 GHz : application to phase shifters. Integrated Ferroelectrics, 2007, 93, pp.110-118. ⟨10.1080/10584580701756284⟩. ⟨hal-00285627⟩
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