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| Azevedo, Nuno Monteiro |
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Paven-Thivet, Claire Le
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Topics
Publications (9/9 displayed)
- 2014Miniaturized notch antenna based on lanthanum titanium perovskite oxide thin filmscitations
- 2014Lanthanum titanium perovskite compound: Thin film deposition and high frequency dielectric characterizationcitations
- 2013Influence of the sputtering reactive gas on the oxide and oxynitride LaTiON deposition by RF magnetron sputteringcitations
- 2012Dielectric oxynitride LaTiO<sub>x</sub>N<sub>y</sub> thin films deposited by reactive radio-frequency sputteringcitations
- 2011Perovskite oxynitride LaTiOxNy thin films : Dielectric characterization in low and high frequenciescitations
- 2010Oxynitrides Perovskites Thin Films : Photoelectrochemical Measurement Under Visible Light
- 2009Photoelectrochemical Properties of Crystalline Perovskite Lanthanum Titanium Oxynitride Films under Visible Light.citations
- 2008Structural and dielectric properties of oxynitride perovskite LaTiOxNy thin filmscitations
- 2007Oxynitride perovskite LaTiO<sub>x</sub>N<sub>y</sub> thin films deposited by reactive sputteringcitations
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article
Miniaturized notch antenna based on lanthanum titanium perovskite oxide thin films
Abstract
This paper presents the integration of a dielec. La2Ti2O7 compd. as thin film in a discrete capacitive component operating at microwaves. The integration in a notch antenna of a MIM (metal/insulator/metal) structure based on this oxide material is numerically and exptl. studied. Oxide films are deposited by reactive magnetron r.f. sputtering of an La2Ti2O7 target. The films are composed of an unusual phase: the orthorhombic La2Ti2O7 compd., with a textured growth on Pt/Si and Pt/SrTiO3 substrates. Moderate dielec. const. values (ε ≈ 60) and low loss (tan δ < 0.005) are obtained at 1 GHz. Inserting this original MIM capacitor in the antenna structure results in a shift to a lower value of its operating frequency. This shift, from 885-317 MHz, corresponds to a significant size redn. of 64.2%. The measured values are confronted with simulation obtained by numerical software.