Sökning: "Gap vågledare"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Gap vågledare.

  1. 1. A Travelling Wave Slot Array based on a Double-Layer Lens for 77 GHz Automotive Radar

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

    Författare :Ashray Ugle; [2023]
    Nyckelord :Automotive radar; Double-layer lens; Gap waveguide technology; Waveguide slot; Antenna array; Lens-beamforming.; Bilradar; Dubbelskiktslins; Gap-vågledarteknik; Waveguide-kortplats; Antennuppsättning; Lens-beamforming.;

    Sammanfattning : Automotive radars have gained considerable interest in recent years for applications of road safety for vulnerable road users. The use of multipleinput and multiple-output (MIMO) technology in automotive radar has helped in realising a virtual aperture greater than the physical aperture of the antenna which has reduced the size of the overall radar module. 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. Low-dispersive Leaky-wave Antennas: A Viable Approach for Fifth Generation (5G) mmWave Base Station Antennas

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Oskar Dahlberg; [2019]
    Nyckelord :;

    Sammanfattning : In this work, a method to achieve reduced beam-squint in fully metallic leaky-wave antennas is proposed and its applicability for high frequency, high gain, base station antennas in future communication networks is indicated. The antenna is built in gap waveguide technology, where the fundamental mode is allowed to leak by removal of one of the waveguide walls. LÄS MER

  5. 4. 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

  7. 5. 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