Sökning: "permittivity"

Visar resultat 1 - 5 av 33 uppsatser innehållade ordet permittivity.

  1. 1. Capacitance Optimization and Ballistic Modeling of Nanowire Transistors

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Azal Alothmani; [2018]
    Nyckelord :Nanowire transistor; 1-D MOSFET; RF performance; permittivity; parasitic capacitance; HSQ; COMSOL Multiphysics; Technology and Engineering;

    Sammanfattning : Downscaling of Si-based metal-oxide-semiconductor field-effect transistors (MOSFETs) has contributed to increased microchip device density and to improve the functionality of the electronic circuits. The dimensions of state of art MOSFET is down to a few nanometers. It has been demonstrated that smaller MOSFETs are faster and more energy-efficient. LÄS MER

  2. 2. Design, Fabrication and Validation of High-permittivity Low-loss Microwave Material for Biomedical Sensor

    M1-uppsats, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Jasmin Gasi; [2018]
    Nyckelord :Biomedical; high dielectric constant; low loss dielectric; sensors; sin-tering; open ended coaxial probe; open ended circular waveguide; tita-nium dioxide;

    Sammanfattning : Abstract The purpose of this task is to synthesize a dielectric substrate material through a sintering process, which can be used for non-invasive physiological sensor development. Low loss, high dielectric constant ceramic material is used. LÄS MER

  3. 3. Radar Transparency and Paint Compatibility - A Study of Automobile Bumper and Bumper-Skin Complex Permittivities for 77GHz Microwaves

    H-uppsats, Chalmers tekniska högskola/Institutionen för industri- och materialvetenskap

    Författare :Erik Emilsson; [2017]
    Nyckelord :microwave; 77GHz; polymer; dielectric; permittivity; free-space method; metal flakes; effect pigment.;

    Sammanfattning : This study aims to identify the key factors, regarding bumper and bumper coatings, that affect radar transparency for radar at 77GHz. Dielectric spectroscopy in the 60-90GHz microwave region was performed using the free- space method was performed on 21 flat plastic substrates with various combinations of primers, basecoats and topcoats. LÄS MER

  4. 4. Mixing ratio determination of binary solvent mixtures in high-pressure microfluidics

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Mikrosystemteknik

    Författare :Anton Wilson; [2017]
    Nyckelord :fluid; mixture; high-pressure; microfluidics;

    Sammanfattning : The focus of this project is to find a suitable method to determine the mixing ratio inbinary fluid mixtures in continuous-flow microfluidic systems because of thedifficulties in doing so for mixtures containing compressible fluids. Refractive indexand relative static permittivity are both properties that could be suitable, but methodsmeasuring the refractive index scales badly for microsystems. LÄS MER

  5. 5. Investigation of Wide Band mm-Wave Radome

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Shreyasi Bhowmik; [2017]
    Nyckelord :;

    Sammanfattning : “Radome” is a necessary shield for any type of antenna. Itsshape, thickness, mechanical and electrical properties defineits application. This thesis mainly revolves around thetechniques, used for radome analysis in W-band with thehelp of electromagnetic solvers of High Frequency StructureSimulator (HFSS) and CST Microwave Studio. LÄS MER