Sökning: "geodesic lens"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden geodesic lens.

  1. 1. 3D Printed Modulated Geodesic Lens Antenna With Even Coverage in the Far-Field

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

    Författare :Harald Lindohf; Marcus Wikner; [2022]
    Nyckelord :3D-printed; geodesic; modulated; Luneburg; beamforming; lens antenna;

    Sammanfattning : The development of 5G and 6G entails new demandson antennas. This includes fast and reliable connections to a largenumber of devices. A wider area of coverage, and thus moreantennas are also expected, which is problematic for the expensiveantennas used today. To meet those demands, a geodesic lensantenna has been proposed. LÄS MER

  3. 2. Low-profile fully-metallic Luneburg lens antenna

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

    Författare :Justine Djounidi; [2022]
    Nyckelord :Beam Scanning; Luneburg Lens Antenna; Fully-metallic; Millimeter Wave; Vinkelskanning; Luneburg Linsantenn; Fullt Metalliskt; Millimetervåg;

    Sammanfattning : Modern communication systems face new technological challenges, such as the narrowness and overload of the conventional frequency bands employed for these applications. Nowadays, communication systems are expected to operate at higher frequencies, such as the mm-wave band. LÄS MER

  4. 3. 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

  5. 4. Increasing the Crossover Levels of Beams in Geodesic Luneburg Lens Antennas

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

    Författare :Philip Arnberg; [2021]
    Nyckelord :Luneburg lens; geodesic lens; generalized Luneburg lens; crossover level and lens antennas.; Luneburg lins; geodetisk lins; generaliserad Luneburg lins; korsningsnivåer och linsantenner.;

    Sammanfattning : The new and forthcoming generation of mobile networks intend to operate at considerably higher frequencies than the previous systems. This lift in frequency of operation alleviates today’s communication systems’ crowded bandwidth and allows for faster data rates than previously possible. LÄS MER

  7. 5. 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