The Experts below are selected from a list of 237 Experts worldwide ranked by ideXlab platform

H. Mogul - One of the best experts on this subject based on the ideXlab platform.

  • thermochemical description of Dielectric breakdown in high Dielectric Constant materials
    Applied Physics Letters, 2003
    Co-Authors: J W Mcpherson, A. Shanware, H. Mogul
    Abstract:

    A thermochemical/molecular model is developed for breakdown in high Dielectric Constant materials and the model suggests that a fundamental relationship exists between Dielectric breakdown strength (Ebd) and Dielectric Constant (k). The model indicates that Ebd should show an approximate (k)−1/2 dependence over a wide range of high Dielectric Constant materials. The model also predicts that the field-acceleration parameter (γ), from time-dependent Dielectric breakdown (TDDB) testing, should increase with Dielectric Constant. TDDB and Ebd data are presented for model support. The thermochemical model suggests that the very high local electric field (Lorentz-relation/Mossotti-field) in high-k Dielectrics tends to distort/weaken the polar molecular bonds making them more susceptible to bond breakage by standard Boltzmann processes and/or by hole capture and thus lowers the breakdown strength.

  • Thermochemical description of Dielectric breakdown in high Dielectric Constant materials
    Applied Physics Letters, 2003
    Co-Authors: JEFF MCPHERSON, A. Shanware, J Y Kim, H. Mogul
    Abstract:

    A thermochemical/molecular model is developed for breakdown in high Dielectric Constant materials and the model suggests that a fundamental relationship exists between Dielectric breakdown strength (Ebd) and Dielectric Constant (k). The model indicates that Ebd should show an approximate (k)-1/2 dependence over a wide range of high Dielectric Constant materials. The model also predicts that the field-acceleration parameter (γ), from time-dependent Dielectric breakdown (TDDB) testing, should increase with Dielectric Constant. TDDB and Ebd data are presented for model support. The thermochemical model suggests that the very high local electric field (Lorentz-relation/Mossotti-field) in high-k Dielectrics tends to distort/weaken the polar molecular bonds making them more susceptible to bond breakage by standard Boltzmann processes and/or by hole capture and thus lowers the breakdown strength. © 2003 American Institute of Physics.

L.m. Walpita - One of the best experts on this subject based on the ideXlab platform.

  • Temperature compensated high-Dielectric-Constant thermoplastic microwave materials
    IEE Proceedings - Microwaves Antennas and Propagation, 2000
    Co-Authors: L.m. Walpita
    Abstract:

    Temperature-stable high-Dielectric-Constant thermoplastic polymer composites with low loss tangent are expected to find use in outdoor and indoor wireless applications. The authors introduce a method of generating such a composite, by balancing the temperature coefficient of the Dielectric Constant of the polymer matrix with those of the high-Dielectric-Constant ceramic fillers.

  • Temperature-compensated thermoplastic high Dielectric-Constant microwave laminates
    IEEE Transactions on Microwave Theory and Techniques, 1999
    Co-Authors: L.m. Walpita, P. Chen, H. Goldberg, S. Hanley, W.m. Pleban, S. Weinberg, C. Zipp, G. Adams, Y.h. Wong
    Abstract:

    High Dielectric-Constant materials are increasingly needed in microwave circuit miniaturization for outdoor and indoor wireless applications. In this paper, we introduce temperature-stable high Dielectric-Constant thermoplastic polymer compositions and copper-laminated sheets made out of them for microwave circuits. The compositions are made by mixing suitable ceramics and polymers. The design, fabrication, and properties of these compositions are discussed. The effect of temperature on the resonance frequency of a patch antenna made out of the copper-laminated high Dielectric-Constant composite sheets is also discussed.

Y.h. Wong - One of the best experts on this subject based on the ideXlab platform.

  • Temperature-compensated thermoplastic high Dielectric-Constant microwave laminates
    IEEE Transactions on Microwave Theory and Techniques, 1999
    Co-Authors: L.m. Walpita, P. Chen, H. Goldberg, S. Hanley, W.m. Pleban, S. Weinberg, C. Zipp, G. Adams, Y.h. Wong
    Abstract:

    High Dielectric-Constant materials are increasingly needed in microwave circuit miniaturization for outdoor and indoor wireless applications. In this paper, we introduce temperature-stable high Dielectric-Constant thermoplastic polymer compositions and copper-laminated sheets made out of them for microwave circuits. The compositions are made by mixing suitable ceramics and polymers. The design, fabrication, and properties of these compositions are discussed. The effect of temperature on the resonance frequency of a patch antenna made out of the copper-laminated high Dielectric-Constant composite sheets is also discussed.

A. Shanware - One of the best experts on this subject based on the ideXlab platform.

  • thermochemical description of Dielectric breakdown in high Dielectric Constant materials
    Applied Physics Letters, 2003
    Co-Authors: J W Mcpherson, A. Shanware, H. Mogul
    Abstract:

    A thermochemical/molecular model is developed for breakdown in high Dielectric Constant materials and the model suggests that a fundamental relationship exists between Dielectric breakdown strength (Ebd) and Dielectric Constant (k). The model indicates that Ebd should show an approximate (k)−1/2 dependence over a wide range of high Dielectric Constant materials. The model also predicts that the field-acceleration parameter (γ), from time-dependent Dielectric breakdown (TDDB) testing, should increase with Dielectric Constant. TDDB and Ebd data are presented for model support. The thermochemical model suggests that the very high local electric field (Lorentz-relation/Mossotti-field) in high-k Dielectrics tends to distort/weaken the polar molecular bonds making them more susceptible to bond breakage by standard Boltzmann processes and/or by hole capture and thus lowers the breakdown strength.

  • Thermochemical description of Dielectric breakdown in high Dielectric Constant materials
    Applied Physics Letters, 2003
    Co-Authors: JEFF MCPHERSON, A. Shanware, J Y Kim, H. Mogul
    Abstract:

    A thermochemical/molecular model is developed for breakdown in high Dielectric Constant materials and the model suggests that a fundamental relationship exists between Dielectric breakdown strength (Ebd) and Dielectric Constant (k). The model indicates that Ebd should show an approximate (k)-1/2 dependence over a wide range of high Dielectric Constant materials. The model also predicts that the field-acceleration parameter (γ), from time-dependent Dielectric breakdown (TDDB) testing, should increase with Dielectric Constant. TDDB and Ebd data are presented for model support. The thermochemical model suggests that the very high local electric field (Lorentz-relation/Mossotti-field) in high-k Dielectrics tends to distort/weaken the polar molecular bonds making them more susceptible to bond breakage by standard Boltzmann processes and/or by hole capture and thus lowers the breakdown strength. © 2003 American Institute of Physics.

P. De Maagt - One of the best experts on this subject based on the ideXlab platform.

  • Measurement of the Dielectric Constant and loss tangent of high Dielectric-Constant materials at terahertz frequencies
    IEEE Transactions on Microwave Theory and Techniques, 2003
    Co-Authors: P.h. Bolivar, M. Brucherseifer, J.g. Rivas, R. Gonzalo, I. Ederra, A.l. Reynolds, M. Holker, P. De Maagt
    Abstract:

    Low-loss high Dielectric-Constant materials are analyzed in the terahertz frequency range using time-domain spectroscopy. The Dielectric Constant and loss tangent for steatite, alumina, titania loaded polystyrene, and zirconium-tin-titanate are presented and compared to measurements on high-resistivity silicon. For these materials, the real part of the Dielectric Constant ranges from 6 to 90. All of the samples were found to have reasonable low-loss tangents. Applications as photonic crystal substrates for terahertz frequency antenna are envisaged.