Sökning: "permittivity"

Visar resultat 11 - 15 av 50 uppsatser innehållade ordet permittivity.

  1. 11. Measurement of the Complex Permittivity of Phantoms for 5G/6G Compliance Tests

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

    Författare :William Utriainen; Adel Alizadeh; [2021]
    Nyckelord :5G; radiation; absorption; safety;

    Sammanfattning : In late 2019, 5G, the next generation of networktechnology was first deployed. The first deployment covers onlya small part of the total data transfer needs. In order to increasedata transfer, the frequency band used, must be increasedtowards the millimeter wave.As the frequency band is increased, safety studies must be done. LÄS MER

  3. 12. Simulation of FMCW mode MIMO Radar for Performance Analysis as Industrial Safety System

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

    Författare :Jay Prakash; [2021]
    Nyckelord :Industrial safety; SIL; radar; MIMO; FMCW; EM scattering; FEM; Tissue permittivity; Radar cross section; CFAR; maskinsäkerhet; SIL; radar; MIMO; FMCW; elektromagnetisk spridning; FEM; Tissue permittivitet; Radar cross section; CFAR;

    Sammanfattning : In industrial environments workers can be prone to dangerous situations that may cause harm. In order to prevent accidents and fulfill legislative requirements for safe working condition, a safety system can be needed to be installed in place. LÄS MER

  4. 13. Testbed Development for Non-invasive Intracranial Pressure Monitoring with a Microwave based Electromagnetic Skin Patch Sensor

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Sandra Palm; Hassan Saado; [2021]
    Nyckelord :Intracranial pressure; Artificial cerebrospinal fluid; Biomedical engineering; Microwave sensor;

    Sammanfattning : Traumatic brain injuries (TBIs) are a major public health problem worldwide where the symptoms can be anything from mild concussion to severe swelling of the brain tissue. As a result of TBI the intracranial pressure (ICP) can elevate to pathological levels with severe consequences such as hypoxia, ischemia and brain hemorrhage. LÄS MER

  5. 14. 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

  7. 15. Study of different methodologies to determine relative dielectric constant of given substrate using fabrication, modelling and measurement strategies

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Anders Lundberg; [2021]
    Nyckelord :Relative dielectric constant; relative permittivity; PCB substrate material;

    Sammanfattning : In this thesis, different methods for measuring the relative dielectric constant is investigated using simulations and experimental approaches. The first method is known as the S-parameter inversion method. In this method formulae is used to calculate the characteristic impedance of the microstrip line from measured S-parameters. LÄS MER