Search results for "Dielectric resonators"

showing 2 items of 2 documents

Efficient Analysis of Arbitrarily Shaped Inductive Obstacles in Rectangular Waveguides Using a Surface Integral Equation Formulation

2007

In this paper we propose to use the Surface Integral Equation technique for the analysis of arbitrarily shaped Hplane obstacles in rectangular waveguides, which can contain both metallic and/or dielectric objects. The Green functions are formulated using both spectral and spatial images series, whose convergence behavior has been improved through several acceleration techniques. Proceeding in this way, the convergence of the series is not attached to the employment of any particular basis or test function, thus consequently increasing the flexibility of the implemented technique. In order to test the accuracy and numerical efficiency of the proposed method, results for practical microwave c…

Surface (mathematics)Componentes de guía de ondasWaveguide componentsAccelerationResonadores dieléctricosConvergence (routing)Electronic engineeringGreen's functionsMoment methodsElectrical and Electronic EngineeringIntegral equationsDiscontinuidades de ondas guíaMathematicsTeoría de la Señal y las ComunicacionesRadiationSeries (mathematics)Basis (linear algebra)Methods currentlyNumerical analysisMathematical analysisMétodos de momentosCondensed Matter PhysicsIntegral equationWaveguide discontinuitiesDielectric resonatorsEcuaciones integralesTest functions for optimizationFunciones GreenIntegral equation (IE)3325 Tecnología de las Telecomunicaciones
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Céramiques diélectriques commandables pour applications micro-ondes : composites à base de titanate de baryum-strontium et d'un oxyde non ferroélectr…

2001

Since the last decades, dielectric ceramics have been considered as attractive for microwave applications as tunable dielectric resonators or phase shifters. For that, ceramic devices should be tunable – change in dielectric constant with applied voltage- with moderate to low dielectric constant (30 to 1000) and loss tangent as low as possible. To reconcile these properties, composite ceramics based on Ba0.6Sr0.4TiO3 (BSTO) and a non-ferroelectric oxide with a low dielectric constant (MgTiO3 or MgO) were synthesised. The aim of this study was to correlate the microstructure with the dielectric properties, especially the Curie temperature and the dielectric relaxation phenomena.Ceramics with…

attrition[CHIM.MATE] Chemical Sciences/Material chemistrydielectric lossescomposites ceramicsmicrostructurepertes diélectriquesbarium-strontium titanatemicrowave dielectricstunable dielectric resonatorscéramiques compositesdiélectriques hyperfréquencestitanate de baryum-strontiumattrition milling[ CHIM.MATE ] Chemical Sciences/Material chemistryrésonateurs diélectriques accordables[PHYS.COND] Physics [physics]/Condensed Matter [cond-mat][ PHYS.COND ] Physics [physics]/Condensed Matter [cond-mat]
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