Sökning: "absorption losses"

Visar resultat 1 - 5 av 33 uppsatser innehållade orden absorption losses.

  1. 1. Ray Tracing Algorithm for Dielectric Domes

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

    Författare :Maria Pubill; [2023]
    Nyckelord :Array antenna; dielectric dome; Ray-Tracing; reflection; absorption losses; matching layers; Arrayantenn; dielektrisk kupol; strålföljning; reflektion; absorptionsförluster; anpassningsskikt;

    Sammanfattning : Almost hemispherical scanning capabilities are required for modern wireless communication systems to produce broad coverage without performance degradation. Phased array antennas are commonly used as a fully-electronic beam-steering solution for its rapidity in beam switching. LÄS MER

  3. 2. Design of a Dielectric Radome using a Ray-Tracing Model for Satellite Communications

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

    Författare :Flores Espinosa Núria; [2023]
    Nyckelord :Dielectric radome; Ray tracing; Array antenna; Lens antenna; Satellite communications; Radom dielèctric; Traçat de Rajos; Arranjament d’antenes; Antena de lent; Comunicacions per satèl·lit; Dielektrisk radome; Strålspårning; Gruppantenn; Linsantenn; Satellitkommunikation;

    Sammanfattning : In recent years, there has been a huge increase in the use of satellite communications. This has led to a need for more capacity, which can be solved by moving towards higher frequency bands in search of higher bandwidths. LÄS MER

  4. 3. Comparison of RF Heating in ASDEX Upgrade and ITER

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

    Författare :Axel Blennå; Mark Kalldas; [2022]
    Nyckelord :Fusion; ASDEX Upgrade; ITER; FEMIC; ICRH; eigenmode; beam; wave absorption;

    Sammanfattning : The increased effects of global warming have been a driving force to further research and develop sustainable energy sources, such as fusion. In this study, two different fusion devices are compared in terms of ion cyclotron resonance heating (ICRH)of plasma. The two devices are the tokamaks ASDEX Upgrade and not yet built ITER. LÄS MER

  5. 4. Crosslinked Cartonboard - Challenges and possibilities

    Master-uppsats, Mälardalens universitet/Akademin för innovation, design och teknik

    Författare :Malin Elvin; [2022]
    Nyckelord :Cartonboard; crosslinking; mechanical properties; SCT;

    Sammanfattning : The need for sustainable packaging is growing, and plastic waste needs to be reduced. A suitable alternative could be fibre-based packaging and cartonboard, and several actions could enhance this alternative. This study investigates crosslinking, a method to create stronger bonds between the OH-groups in the material. LÄS MER

  7. 5. Möjligheterna att implementera bio-CCS och CCS på Högdalenverket : En fallstudie över fyra olika koldioxidavskiljningsteknologier och deras kompatibilitet på Högdalenverket med avseende på tekniska, ekonomiska, miljömässiga och energirelaterade aspekter.

    Master-uppsats, Linköpings universitet/Energisystem

    Författare :Emma Nilsson; Evelina Östlund; [2021]
    Nyckelord :CCS; bio-CCS; BECSS; aminteknologi; Hot Potassium Carbonates; Compact Carbon Capture; Svante; kraftvärmeverk; avfallsförbränning; koldioxidavskiljning;

    Sammanfattning : Increased carbon dioxide in the atmosphere has raised the attention to Carbon Capture and Storage (CCS). Stockholm Exergi is a company conducting research on CCS and bio-CCS, a form of CCS where biogenic CO2 is captured. LÄS MER