Sökning: "low loss dielectric"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden low loss dielectric.

  1. 1. Characterization of monkey fat tissues : To assist their viability for fat intra-body communication as an early step of non-human primate testing (NHP)

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Institutionen för materialvetenskap

    Författare :Qsai Alyounes; Alkari Razan; [2022]
    Nyckelord :Fat-IBC; Monkey tissues; Phantoms; Network analyzer; Dielectric proporties;

    Sammanfattning : Fat intra-body communication is a newly proven concept that is built on using human fat tissues as a communication channel for electromagnetic waves inside the body. This allows for two implanted external devices to connect through an intra-body closed-loop communication channel. LÄS MER

  3. 2. Measurements of resistivity in transformer insulation liquids

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för elektroteknik

    Författare :Jonathan Hägerbrand; [2020]
    Nyckelord :transformer oil; resistivity; ions; ion drift model; HVDC; contact resistance;

    Sammanfattning : This thesis focuses on measuring techniques and results of resistivity in four commercially available insulating transformer oils: mineral oil, ester oil and two isoparaffin oils. Two measuring techniques, the industrially used diagnostic system for electrical insulation IDA and the Labview implemented Triangular Method, are used for resistivity measurements and the techniques are compared, a correction algorithm to the triangular method is suggested. LÄS MER

  4. 3. 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

  5. 4. A Cost-Effective Luneburg Lens Based on Glide-Symmetric Metasurface for 5G Applications

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

    Författare :Martin Mattsson; [2018]
    Nyckelord :;

    Sammanfattning : In this work, a cost-eective at Luneburg lens antenna operating at the Ka-band is presented.The antenna is suitable for high frequency applications in future communicationnetworks such as 5G systems due to its simple feeding, high directivity, and low loss.The lens is composed of a parallel plate structure loaded with glide-symmetric holes. LÄS MER

  7. 5. The Effect of Partial Discharge Aging on the Dielectric Response of Polymers

    Uppsats för yrkesexamina på avancerad nivå, KTH/Elektroteknisk teori och konstruktion

    Författare :David Bergman; [2014]
    Nyckelord :;

    Sammanfattning : This work investigated the effect of partial discharges (PD) on the complex permittivity of PVC, PC, PTFE, PE and PA6. The material samples were subjected to prolonged PD activity and the complex permittivity of the material was measured by dielectric spectroscopy (DS) before and after the sample was aged. LÄS MER