Sökning: "waveguide arrays"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden waveguide arrays.

  1. 1. Scanning range extension by combining arrays with lenses

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

    Författare :Hairu Wang; [2022]
    Nyckelord :Dome Antenna; Dielectric Lens; Array Antenna; Kupolantenn; Dielektrisk lins; Array antenn;

    Sammanfattning : Array antennas, and more specifically phased array antennas, are widely used in radar detection and communication systems because of their excellent beam scanning ability and simple control. Generally speaking, the scanning function can be realized in two ways: mechanically or electronically. LÄS MER

  3. 2. Dual-polarized geodesic lens in sub-THz

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

    Författare :Wenfu Fu; [2022]
    Nyckelord :beam scanning; dual polarization; fully metallic; geodesic lens; Luneburg lens antenna; THz; strålskanning; korspolarisering; fullt metallisk; geodetisk lins; Luneburg linsantenn; THz;

    Sammanfattning : In the sub-THz frequency range, the geodesic lens can realize low losses and beam scanning capability with high gain and high aperture efficiency due to its fully metallic property and rotational symmetry. Therefore, in high-frequency applications, a geodesic lens is considered a more promising solution in comparison to phased arrays or other beamforming techniques. LÄS MER

  4. 3. Slotted Waveguide Array Synthesis in Gap Waveguide Technology

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

    Författare :Alvaro Morso Granero; [2021]
    Nyckelord :;

    Sammanfattning : The automotive industry is evolving with the advent and development of autonomous cars. For the operation of these vehicles, sensors are needed, and utilising radar technology is a good solution. 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. Characterization of attractors in a model for boundary-driven nonlinear optical waveguide arrays with disorder, gain and damping

    Kandidat-uppsats, Teoretisk Fysik; Tekniska högskolan

    Författare :Felix Faber; [2013]
    Nyckelord :waveguide arrays; nonlinear; disorder; gain; damping; randomly distributed potentials; DNLS; Discrete nonlinear Schrödinger equation;

    Sammanfattning : The purpose of this thesis is to study the effects of gain and damping on a nonlinear waveguide array with a strong disorder that is driven in the first site, and try to find regimes which have stable stationary solutions. This has been done with a modified DNLS (Discrete nonlinear Schrödinger equation). LÄS MER