Essays about: "Direktivitet"

Found 5 essays containing the word Direktivitet.

  1. 1. 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. 2. Acoustic Prediction Methods for Rocket Flame Deflector Design

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : FREDRIK RANOW; [2021]
    Keywords : Flame deflector; Launch pad; Estimation methods; Acoustics; Reflectivity; Diffraction; Directivity; Flamdeflektor; Uppskjutningsplattform; Uppskattningsmetoder; Akustik; Reflektivitet; Diffraktion; Direktivitet;

    Abstract : The aim of the project behind this report is to gain an understanding for the design criteria of launch pad flame deflectors used for launching rockets. This report presents an overview of the underlying phenomena, and then tackles the issue of estimating noise levels that come about during lift-off. READ MORE

  4. 3. Acoustic source strength determination of turbocharger in an unfavourable acoustic environment

    University essay from KTH/MWL Marcus Wallenberg Laboratoriet

    Author : Balaji Vejendla; [2019]
    Keywords : ;

    Abstract : The aim of the M.Sc thesis work is to specify a measurement method suitable for deter-mining the sound power levels and especially to quantifying the levels at the compressor blade pass frequency of a turbocharger in the new turbo performance rig located at Scania CV AB, Södertälje. READ MORE

  5. 4. A Cost-Effective Luneburg Lens Based on Glide-Symmetric Metasurface for 5G Applications

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

    Author : Martin Mattsson; [2018]
    Keywords : ;

    Abstract : In this work, a cost-eective at Luneburg lens antenna operating at the Ka-band is presented.The antenna is suitable for high frequency applications in future communicationnetworks such as 5G systems due to its simple feeding, high directivity, and low loss.The lens is composed of a parallel plate structure loaded with glide-symmetric holes. READ MORE

  6. 5. Lower bounds on the Q-factor for small oversampled superdirective arrays over a ground plane

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Masahiro Wakasa; [2016]
    Keywords : ;

    Abstract : Base station antennas for next generation mobile communication networks will be required to have a wide bandwidth for compatibility and support multi-beam applications. Antenna arrays are one possible candidate for a next generation base station antenna since they can obtain high directivity, support multi-beam and wide angle scanning. READ MORE