Sökning: "Specific absorption rate"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden Specific absorption rate.

  1. 1. Extending Wireless Power Transfer Range for Self-Powered Micro Devices with mm-size Antenna

    Master-uppsats, Linköpings universitet/Elektroniska Kretsar och System

    Författare :Natachai Terawatsakul; [2023]
    Nyckelord :;

    Sammanfattning : The primary challenge in expanding the wireless power transfer range for miniaturized self-powered micro devices is the limited RF energy harvesting due to the small effective area and low gain of the mm-sized antennas used in these devices. This thesis introduces a method for extending the distance between an external energy source antenna (TX) and a micro-device antenna (RX) to more than 10 cm. LÄS MER

  3. 2. ARCTIC PLANT COMMUNITIES RISE WITH TEMPERATURE Plant functional traits as a tool to predict global climate change

    Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Helena Sundell; [2022-07-06]
    Nyckelord :Arctic warming; plant functional traits; Community Weighted Mean; vegetational changes; global climate change;

    Sammanfattning : Global warming occurs at a rate at least three-fold in the arctic regions compared to the rest of the world. Here, plant community functional traits were assessed in response to experimental warming in three arctic areas of Fennoscandia (Latnajajure, Abisko and Kilpisjärvi). LÄS MER

  4. 3. Whole-body SAR measurements of 5G mmW base stations in a reverberation chamber

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

    Författare :Jens Eilers Bischoff; [2022]
    Nyckelord :Reverberation chamber; Whole body specific absorption rate; 5G; Absorption; Antenna measurements; Modväxlande kammare; Helkroppsbaserad specifik absorptionshastighet; SAR; 5G; Absorption; Antennmätningar;

    Sammanfattning : This study presents a method for measurement of whole-body average specific absorption rate (WBSAR) of a millimeter wave (mmWave) antenna in a reverberation chamber. The method takes advantage of multiple radiated power measurements to estimate the power absorbed in a phantom placed in front of the antenna. LÄS MER

  5. 4. Review and Design Adaptations of a SrCl2-NH3 bench-scale Thermochemical Heat Storage system

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Hjörtur Brynjarsson; [2021]
    Nyckelord :Thermochemical heat storage TCS ; SrCl2-NH3; system design; kinetics; absorption; desorption; octaammine; diammine; monoammine; pressure management; commissioning; Termokemisk värmelagring TCS ; SrCl2-NH3; systemdesign; kinetik; absorption; desorption; oktaammin; diammin; monoammin; tryckhantering; driftsättning;

    Sammanfattning : Thermochemical heat storage (TCS) is a thermal energy storage (TES) technology used to store thermal energy for later use. TCS can provide heating or cooling services from intermittently available thermal energy, often low grade waste heat. LÄS MER

  7. 5. Simulation and Measurement of Body Absorption for 5G/6G Frequency Bands

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

    Författare :Maximilian Korac Dalenmark; Frida Skarf; [2021]
    Nyckelord :SAR; 5G; antennas; anechoic chamber; skin-like phantom; bio-heat equation;

    Sammanfattning : For the future implementation of high speed communication,safety remains one of the main concerns. To ensurethe safety of new applications, specifically the new 5G antennas,it is crucial to know that they will not cause any harm to thehuman body. LÄS MER