Search for dissertations about: "Bandwidth measurement"

Showing result 26 - 30 of 114 swedish dissertations containing the words Bandwidth measurement.

  2. 26. Angle-resolved photoemission study of unconventional cuprate superconductors

    Author : Qinda Guo; Oscar Tjernberg; Andrea Damascelli; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Unconventional superconductivity; cuprate; high harmonic generation; narrow bandwidth light source; spherical grating based monochromator; time- and angle-resolved photoemission spectroscopy; Okonventionell supraledning; kuprat; hög övertonsgenerering; ljuskälla med smal bandbredd; sfäriskt gitterbaserad monokromator; tids- och vinkelupplöst fotoemissionsspektroskopi;

    Abstract : Understanding unconventional superconductivity remains one of the most important unsolved problems in physics. A particularly noteworthy case is the copper-based high-temperature superconductor, which stands out due to its remarkably high transition temperature and relatively simple structure. READ MORE

  4. 27. Novel RF MEMS Devices Enabled by Three-Dimensional Micromachining

    Author : Umer Shah; Joachim Oberhammer; Raafat Mansour; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Microelectromechanical systems; MEMS; Radio frequency microelectromechanical systems; RF MEMS; Micromachined transmission line; Micromachining; Tuneable capacitor; Switched capacitor; Coupled-line coupler; Tuneable directional coupler; Intermodulation distortion; MEMS varactor; Two-tone IIP3 measurement; Passive components and circuits; Reliability; Magnetic materials; NiFe multilayer composite; Permeability; Permittivity; Micromachined inductors;

    Abstract : This thesis presents novel radio frequency microelectromechanical (RF MEMS) circuits based on the three-dimensional (3-D) micromachined coplanar transmission lines whose geometry is re-configured by integrated microelectromechanical actuators. Two types of novel RF MEMS devices are proposed. READ MORE

  5. 28. Reduction of metal artifacts in MR imaging of patients with total hip arthroplasty

    Author : Gunilla Müller; Malmö Diagnostisk radiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging. Musculoskeletal. Hip. Hip prosthesis. Complications. Metal artifact. Metal artifact-reducing sequences MARS . Phantom studies. Artifact measurement. Image distortion.;

    Abstract : Aims of the studies: To apply and compare MR imaging metal artifact reducing sequences (MARS) including subtraction imaging after contrast application in patients with metal-on-metal (MoM) hip prostheses, investigate the prevalence and characteristics of periprosthetic abnormalities, as well as their relation with pain and risk factors. [Paper I]. READ MORE

  6. 29. Enhancing Radio Frequency System Performance by Digital Signal Processing

    Author : Charles Nader; Peter Händel; Niclas Björsell; Thomas Eriksson; Högskolan i Gävle; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Elektronik;

    Abstract : In this thesis measurement systems for the purpose of characterization of radio frequency power amplifiers are studied. Methods to increase the speed, accuracy, bandwidth, as well as to reduce the sampling requirements and testing cost are presented. READ MORE

  7. 30. Enhancing Radio Frequency System Performance by Digital Signal Processing

    Author : Charles Nader; Peter Händel; Niclas Björsell; Thomas Eriksson; KTH; []
    Keywords : ;

    Abstract : In this thesis measurement systems for the purpose ofcharacterization of radio frequency power amplifiers are studied.Methods to increase the speed, accuracy, bandwidth, as well as toreduce the sampling requirements and testing cost are presented. READ MORE