693.932 PEOPLE
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Kočí, Jan | Prague |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Cros, Dominique
University of Limoges
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2021Enhanced tunability and temperature-dependent dielectric characteristics at microwaves of K0.5Na0.5NbO3 thin films epitaxially grown on (100)MgO substratescitations
- 2021Hybridization of additive manufacturing processes to build ceramic/metal parts: Example of HTCCcitations
- 2020Hybridization of additive manufacturing processes to build ceramic/metal parts: Example of LTCCcitations
- 2016BST thin film capacitors integrated within a frequency tunable antenna
- 2014Intercomparison of Permittivity Measurement Techniques for Ferroelectric Thin Layerscitations
- 2011Microwave properties of semi-insulating silicon carbide between 10 and 40 GHz and at cryogenic temperaturescitations
- 2010Detrapping and retrapping of free carriers in nominally pure single crystal GaP, GaAs, and 4H–SiC semiconductors under light illumination at cryogenic temperaturescitations
- 2010High permeability and high permittivity heterostructures for the miniaturization of Radiofrequency components
- 2010A 380-420 MHz Two Pole tunable filter using new ferroelectric composite capacitors
- 2009Filter Synthesis using Shear Wave Piezoelectric Layer Resonators
- 2009Magnetodielectric Thin Film Heterostructure With High Permeability and Permittivity
- 2008Characterization of materials and mode structure of high-Q resonators using Bragg confined modes
- 2008Modified permittivity observed in bulk gallium arsenide and gallium phosphide samples at 50 K using the whispering gallery mode methodcitations
- 2008Low-loss materials for high -factor Bragg reflector resonatorscitations
- 2007Pulsed laser deposition o aluminum nitride thin films for FBAR applicationscitations
- 2003Characterization of a spherically symmetric fused-silica-loaded cavity microwave resonatorcitations
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article
Low-loss materials for high -factor Bragg reflector resonators
Abstract
A Bragg resonator uses dielectric plates within a metallic cavity to confine the energy within a central free space region. The importance of the permittivity is shown with a better Q factor possible using higher permittivity materials of larger intrinsic dielectric losses. This is because the electric energy in the reflectors decreases proportionally to the square root of permittivity and the coupling to the metallic losses decrease linearly. In a sapphire resonator with a single reflector pair a Q factor of 2.34×105 is obtained, which may be improved on by up to a factor of 2 using higher permittivity materials.