Sökning: "periodiska strukturer"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden periodiska strukturer.

  1. 1. A Comparison Between Applied Square and Ring CSRR on SIW Using the HOM Method

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

    Författare :Carl Nordengren; Johan Bellbrant; [2022]
    Nyckelord :Split-ring resonators; bandgap-filter; higher order modes method; substrate integrated waveguide; periodic structures;

    Sammanfattning : The rise of connected devices and the internet of things has increased the need for systems capable of transmitting high frequency signals wirelessly. An important part of these systems are the filters. Filters remove signals within unwanted frequency ranges. These filters can be implemented using e. LÄS MER

  3. 2. Simulation of Lüneburg Lens Constructed With Glide Symmetric Periodic Structures

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

    Författare :Joar Forsberg; Olle Blomqvist; [2020]
    Nyckelord :Metasurface; glide symmetry; lens; Lüneburglens; unit cell;

    Sammanfattning : The goal of this project was to design a lens utilisinga glide symmetric periodic structure. A Lüneburg lens forantennas with a center frequency of 8 GHz has been designed.The structure was constructed using a unit cell in the shape ofan angular Bowen knot. This unit cell was then etched on themetallic surface of a parallel plate waveguide. LÄS MER

  4. 3. Filters for 5G mmWave

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

    Författare :Alberto Monje Real; [2019]
    Nyckelord :;

    Sammanfattning : Periodic structures are an emerging eld in nowadays's microwave designs.These structures have been proven to be capable of achieving compact, ecientsolutions to problems such as leakage, or surface waves. Moreover, they haveshown interesting properties in dierent microwave related areas, such as lensantenna design, and gap-waveguide technology. LÄS MER

  5. 4. Wireless communication using metasurfaces for condition monitoring in motor

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

    Författare :Neelu Kambisseri Roby; [2018]
    Nyckelord :Gap waveguide; metasurface; holey electromagnetic band gap EBG structures; periodic structures; parallel plate mode.; Gap vågledare; metaytor; håliga elektromagnetiskta bandgap-strukturer EBG ; periodiska strukturer; parallellplattform.;

    Sammanfattning : Wireless sensors are used widely for condition monitoring in electric machines. The metal enclosure of an electric motor restricts the signal from sensors to radiate outside. The signal from the metal cavity needs to be guided to the only opening in the enclosure, through a narrow gap between the stator and the rotating rotor. LÄS MER

  7. 5. Mode Matching Analysis of One-Dimensional Periodic Structures

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Martin Lindberg; [2018]
    Nyckelord :waveguide; wave propagation; electromagnetic fields; dispersion relation; mode matching; glide symmetry; periodic structures iii; V°agledare; V°agutbredning; elektromagnetiska f¨alt; dispersionsrelation; mod matchning; glid symmetri; periodiska strukturer;

    Sammanfattning : In this thesis, we analyze the electromagnetic wave propagation in waveguidestructuresexhibiting periodical geometry, including glide symmetry. The analysisis performed using a mode matching technique which correlates the different modecoefficients from separate but, connected regions in the structure. LÄS MER