The Experts below are selected from a list of 191622 Experts worldwide ranked by ideXlab platform
L J Louis - One of the best experts on this subject based on the ideXlab platform.
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helicon experiments and simulations in Nonuniform magnetic field configurations
Physics of Plasmas, 1999Co-Authors: John E. Scharer, Y Mouzouris, L J LouisAbstract:Wave, antenna impedance, plasma density, and temperature anisotropy measurements are carried out for a helicon plasma source in Nonuniform and uniform static magnetic fields. Strong axial density gradients associated with the Nonuniform magnetic fields are observed to affect wave fields, absorption, and source efficiency. The wave field and antenna input impedance measurements are compared with a new simulation code which also calculates Poynting power flow and wave absorption profiles. Wave amplitude measurements are shown to decay more rapidly and the phase velocity varies over a wide range for the Nonuniform static magnetic field case.
R Quere - One of the best experts on this subject based on the ideXlab platform.
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new design method of uniform and Nonuniform distributed power amplifiers
IEEE Transactions on Microwave Theory and Techniques, 2001Co-Authors: Cedric Duperrier, Michel Campovecchio, L Roussel, M Lajugie, R QuereAbstract:A new design methodology of uniform and Nonuniform distributed power amplifiers is reported in this paper. This method is based on analytical expressions of the optimum input and output artificial lines making up the uniform and Nonuniform distributed architectures. These relationships are derived from the load-line requirement of each transistor size for optimum power operation. Furthermore, specific design criteria are presented to enable an efficient choice between uniform and Nonuniform distributed architectures. To validate this new design methodology, a Nonuniform distributed power amplifier has been manufactured at the TriQuint Semiconductor Foundry, Richardson, TX, using a 0.25-/spl mu/m power pseudomorphic high electron-mobility process. This single-stage monolithic-microwave integrated-circuit amplifier is made of six Nonuniform cells and demonstrates 1-W output power with 7-dB associated gain and 20% power-added efficiency over a multioctave bandwidth.
You Shan - One of the best experts on this subject based on the ideXlab platform.
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Tunability of Nonuniform Reflection Holographic Filter
Journal of Shanghai Jiaotong University, 2002Co-Authors: You ShanAbstract:The tunability of a Nonuniform reflection holographic filter was investigated theoretically and experimentally. It is shown that the reflection holographic filter has high optical density of peak wavelength, narrow half bandwidth, and very good tunability. The coupled wave theoretical model of uniform medium was compared with the model of Nonuniform medium. It is identified that the theoretical results achieved by the Nonuniform model is more coincident with the experimental results than the results gained by the uniform model.
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Tunability of Nonuniform Reflection Holographic Filter
Journal of Optoelectronics·laser, 2002Co-Authors: You ShanAbstract:The tunability of Nonuniform reflection holographic filter is investigated theoretically and experimentally.It is shown that reflection holographic filter has not only high optical density of peak wavelength and narrow half bandwidth,but also very good tunability.The coupling wave theoretical model of uniform medium is compared with the model of Nonuniform medium.It is identified that the theoretical results gained by the Nonuniform model is more coincident with the experimental results than the results gained by the uniform model.
Guan-ying Li - One of the best experts on this subject based on the ideXlab platform.
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Nonuniform lowness and strong Nonuniform lowness
Journal of Computer Science and Technology, 1995Co-Authors: Hong-zhou Li, Guan-ying LiAbstract:The concepts of the Nonuniform and strong Nonuniform lownesss are introduced. Those notions provide a uniform framework to study connections between the polynomial-time hierarchy and sparse sets.
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ISAAC - Nonuniform Lowness and Strong Nonuniform Lowness
Algorithms and Computation, 1994Co-Authors: Hong-zhou Li, Guan-ying LiAbstract:The concepts of the relativized Nonuniform and strong Nonuniform lowness are introduced and studied. Those notions provide a uniform framework to study connections between the polynomial-time hierarchy and sparse sets.
John E. Scharer - One of the best experts on this subject based on the ideXlab platform.
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helicon experiments and simulations in Nonuniform magnetic field configurations
Physics of Plasmas, 1999Co-Authors: John E. Scharer, Y Mouzouris, L J LouisAbstract:Wave, antenna impedance, plasma density, and temperature anisotropy measurements are carried out for a helicon plasma source in Nonuniform and uniform static magnetic fields. Strong axial density gradients associated with the Nonuniform magnetic fields are observed to affect wave fields, absorption, and source efficiency. The wave field and antenna input impedance measurements are compared with a new simulation code which also calculates Poynting power flow and wave absorption profiles. Wave amplitude measurements are shown to decay more rapidly and the phase velocity varies over a wide range for the Nonuniform static magnetic field case.
