Sökning: "CST"

Visar resultat 6 - 10 av 70 uppsatser innehållade ordet CST.

  1. 6. Numerical Simulations of Wave Propagation between a Left-Handed Material and a Right-Handed Material

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

    Författare :Balwan Rana; [2021]
    Nyckelord :Negative-Index Material; NIM; Positive-Index Material; RHM; Backward- Wave Propagation; Step-Index Interface; Graded-Index Interface; Left-Handed Material; LHM; Right-Handed Material; RHM; Analytical Solution; Validation; Negativt-Index Material; NIM; Positivt-Index Material; PIM; Bakåtvåg-utbredning; Steg-Index Gränssnitt; Gradering-Index Gränssnitt; Vänsterhänt Material; LHM; Högerhänt Material; RHM; Analytisk Lösning; Validering;

    Sammanfattning : The discovery of metamaterials has led to major advances in different fields of physics including optics, microwave engineering and acoustics. Specific to theoretical electromagnetism, the introduction of metamaterials have led to the development of negative-index materials (NIMs) with simultaneous negative permittivity and negative permeability with backward-wave propagation. LÄS MER

  3. 7. Anaerobic Co-Digestion Of Food Waste And Kraft Pulp Fibre To Enhance Digestate Dewaterability

    Master-uppsats, Linköpings universitet/Tema Miljöförändring

    Författare :Kwame Boateng Agyemang; [2021]
    Nyckelord :Anaerobic digestion; Digestate; Dewaterability; Food waste; Pulp fibre;

    Sammanfattning : Digestate produced during anaerobic digestion of food waste is recognised as a good alternative to mineral fertilizer which could also be used to amend soil properties. This has conventionally been applied directly and unprocessed to nearby farms or processed and transported elsewhere. LÄS MER

  4. 8. Study of antenna arrays for direction finding

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :William Eriksson Selin; [2021]
    Nyckelord :aoa; aod; bluetooth 5.1; antenna; array; direction; finding; estimation; MUSIC; subspace; aoa; aod; bluetooth; antenn; antennmatris; riktningsestimation; riktningsidentifiering; MUSIC;

    Sammanfattning : The new Bluetooth standard (Bluetooth 5.1) contains direction finding specifications. Specifications for received signal strength indicator(RSSI) using measures of signal strength in order to give a sense of how far away an object is has been present in earlier versions. LÄS MER

  5. 9. 3D-Printed Geodesic Luneburg Lens Antenna With Novel Patch Antenna Feeding

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

    Författare :Elin Berglund; Sandis Freimanis; [2021]
    Nyckelord :Luneburg lens; patch antenna; geodesic; transformation optics; 3D-printing;

    Sammanfattning : With the roll out of new technologies and the worldbecoming more connected, there is a rising demand for higherbandwidth and new frequency bands. To meet the demand,higher frequencies are used in new communication systems.Higher frequencies come with the need for new antenna designsand one promising type of antenna is the lens antenna. LÄS MER

  7. 10. Fully Metallic One Dimensional Uniform Tapered-Pin Leaky-Wave Antenna at 30 GHz

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

    Författare :Henrik Åkerberg; Puya Faghi; [2021]
    Nyckelord :Leaky-wave antenna; 5G; high frequency; one dimensional antenna; microwave; fully metallic;

    Sammanfattning : This paper describes the design of a one dimensionalleaky-wave antenna, with an operating frequency at 30 GHz.The antenna consists a waveguide with one of the wallsreplaced by a semi-open row of pins, allowing power to leakout. LÄS MER