Sökning: "metasurface"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet metasurface.

  1. 1. Beam Steering Antenna Based on Continuous Transverse Stub Array and Flat Risley Prism Metasurface Lens

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

    Författare :Carl Henriksson; Jonathan Fransson; [2023]
    Nyckelord :;

    Sammanfattning : Satellite communication is an integral part of society in this day and era. Due tobandwidth limitations communication frequencies have moved into higher frequencybandwidths. With the advancements in communication comes the demand for more efficientantennas due to the high attenuation of millimeter wavelength frequencies. LÄS MER

  3. 2. Geodesic Lens Antenna for sub-THz Imaging

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

    Författare :Joan Mitjans i Blasco; [2021]
    Nyckelord :;

    Sammanfattning : The Millimiter Wave (mmW) frequency band, characterized by a high atmospheric attenuation and wide available bandwidth has become of big interest for high accuracy radar imaging applications. The continuous development of the Monolithic Microwave Integrated Circuit (MMIC) technology yields to the appearance of different commercial-off-the-shelf (COTS) radar transceivers at that frequency band, where the antennas are fully integrated into the chip. LÄS MER

  4. 3. 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

  5. 4. Design of a Maxwell Fish-Eye Lens in PCB Technology With a Glide-Symmetric Metasurface

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

    Författare :Philip Arnberg; Oscar Barreira Petersson; [2019]
    Nyckelord :Maxwell fish-eye lens; unit cell; metasurface; glide symmetry.;

    Sammanfattning : The aim of this project is to design a cost-effective planar Maxwell fish-eye lens in PCB technology operating at the center frequency 5 GHz with a bandwidth of 20 %. An approach to design a cost-effective lens is to use a metasurface, which is commonly realized as a periodic structure of unit cells. LÄS MER

  7. 5. Leakage Suppression for PCB-Waveguide Interconnects Using Hybrid Metasurfaces

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

    Författare :David Gonzalez Gallardo; [2019]
    Nyckelord :;

    Sammanfattning : A metasurface is a two dimensional periodic structure which possessesmacroscopic equivalent electromagnetic properties such as anisotropy, negativerefractive index and Electromagnetic Band Gaps (EBG). EBGs havebeen used for the design of waveguide lters and gap waveguides. LÄS MER