Essays about: "lens antenna"

Showing result 16 - 20 of 24 essays containing the words lens antenna.

  1. 16. Geodesic Lens Antenna for sub-THz Imaging

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Joan Mitjans i Blasco; [2021]
    Keywords : ;

    Abstract : 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. READ MORE

  3. 17. Dual Polarized Geodesic Lens

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Freysteinn Vidar Vidarsson; [2020]
    Keywords : ;

    Abstract : Gradient-index (GRIN) lens antennas, such as the Luneburg lens, posses attractive electromagnetic properties. The smooth change in refractive index ensures no internal reflections and the focusing of the electromagnetic waves results in a directive antenna. The main challenge of the design of a GRIN lens is acquiring the required refractive index. READ MORE

  4. 18. Designing a Hyperbolic Lens Antenna using 3D Printing Technology

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Alexander Thorell; Jonas Cederberg; [2020]
    Keywords : 3D printing; Lens antennas; Hyperboliclenses; Permittivity measurement; Telecommunication;

    Abstract : To increase capacity, lower latency, and boostdata rates, new higher gain antennas that can transmitmillimeter-waves are needed. Dielectric lens antennas arean attractive potential solution. READ MORE

  5. 19. Low-dispersive Leaky-wave Antennas: A Viable Approach for Fifth Generation (5G) mmWave Base Station Antennas

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Oskar Dahlberg; [2019]
    Keywords : ;

    Abstract : 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. READ MORE

  6. 20. 3D Printing a Maxwell Fish Eye Lens With Periodic Structures

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Valentine Lin; Tarek Sayed Hamad; [2019]
    Keywords : Maxwell fish eye lens; dielectric lens antenna; metamaterial; periodic structure; 3D printed lenses.;

    Abstract : With the rise of high frequency communication systems such as 5G, new types of antennas has to be developed in order to meet the new requirements. In recent years, lens antennas made of periodic structures has been shown to have desirable performance when increasing operational frequency without increasing the size of the antennas. READ MORE