Sökning: "dielectric properties"

Visar resultat 16 - 20 av 71 uppsatser innehållade orden dielectric properties.

  1. 16. mm Wave Near Field Spot Focus Technique in Free Space Dielectric  Properties Evaluation Method

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Yanhan Liu; [2021]
    Nyckelord :Permittivity; near-field-focused NFF antenna; genetic algorithm; Permittivitet; närfältsfokuserad antenn; genetisk algoritm.;

    Sammanfattning : Radomes were invented to protect sensitive antenna systems from the disturbing environment. Estimation of their permittivity is a vital step for their design. This project studies the free- space method to measure the permittivity of radome materials. LÄS MER

  3. 17. Study of Diamond Folds in Mass-Impregnated(MI) Cables

    Master-uppsats, Linköpings universitet/Mekanik och hållfasthetslära

    Författare :Sucheth Krishna Kumar Bysani; [2021]
    Nyckelord :FEM; MI cable insulation; diamond fold buckling; lapping tension; registration andbutt-gap;

    Sammanfattning : High Voltage (HV) cables are designed to transmit electrical power from the source to the placewhere it is consumed. The global trend towards renewable energy sources e.g. LÄS MER

  4. 18. Geodesic Lens Antenna for sub-THz Imaging

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Joan Mitjans i Blasco; [2021]
    Nyckelord :;

    Sammanfattning : The Millimiter Wave (mmW) frequency band, characterized by a high atmospheric attenuation and wide available bandwidth has become of big interest for high accuracy radar imaging applications. The continuous development of the Monolithic Microwave Integrated Circuit (MMIC) technology yields to the appearance of different commercial-off-the-shelf (COTS) radar transceivers at that frequency band, where the antennas are fully integrated into the chip. LÄS MER

  5. 19. Simulations of Plasma Creating Electric Wind

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Linnéa Sellerholm; Amanda Stenberg; [2021]
    Nyckelord :Plasma actuators; flow control; dielectric barrier discharge;

    Sammanfattning : Plasma actuators are devices that with two electrodesand a dielectric material can ionize the air around itand thus control the airflow. They have considerable potentialfor a multitude of reasons, one of which being that they haveno moving parts, making them easy to produce and hard tobreak. LÄS MER

  7. 20. Dual Polarized Geodesic Lens

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Freysteinn Vidar Vidarsson; [2020]
    Nyckelord :;

    Sammanfattning : Gradient-index (GRIN) lens antennas, such as the Luneburg lens, posses attractive electromagnetic properties. The smooth change in refractive index ensures no internal reflections and the focusing of the electromagnetic waves results in a directive antenna. The main challenge of the design of a GRIN lens is acquiring the required refractive index. LÄS MER