Essays about: "directivity"

Showing result 16 - 20 of 44 essays containing the word directivity.

  1. 16. A Discrete Cylindrical Luneburg Lens With Liquid Layers

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

    Author : Curt-Herman Normark Frisk; Erik Algarp; [2020]
    Keywords : Luneburg lens; 5G; high directivity; liquid lens; transparent liquids;

    Abstract : In this project, a cylindrical Luneburg lens isdesigned operating at optical frequencies. A Luneburg lens isa gradient index lens that transforms a point source into aplane wave or vice versa. The lens is rotational symmetric whichallows wide-angle beam scan. In this work, the gradient indexis discretized in layers. READ MORE

  3. 17. A Novel and an Efficient Design of an Inverted F-Antenna for Bluetooth Low Energy Communications

    University essay from Högskolan i Halmstad/Akademin för informationsteknologi

    Author : Amer Khatib; [2019]
    Keywords : Antenna; Communication; design; testing; Wireless communications; bluetooth.;

    Abstract : Constantly, antenna plays an important role in expanding the wireless communication systems in different technology applications for example, but not limited to, IoT communications and automotive radar systems. On the other hand, the Bluetooth-Low-Energy (BLE) benefits different sorts of applications, as it offers (i) a very low power consumption, (ii) a very fast data transfer, (iii) and an inexpensive/efficient solution as well. READ MORE

  4. 18. 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. 19. The Impact of Antennas on Radiolink Performance in Frequency Hopping Scenarios

    University essay from Uppsala universitet/Signaler och System

    Author : Sofia Bergström; [2018]
    Keywords : ;

    Abstract : This paper investigates how the communication performance of frequency hopping systems are affected by the antenna parameters. The data are generated from Antenna Toolbox in Matlab for the case of two dipole antennas is free space. READ MORE

  6. 20. Real-Time Multiple Audio Beamforming System

    University essay from Lunds universitet/Institutionen för reglerteknik

    Author : Johan Lindqvist; Martin Sollenberg; [2018]
    Keywords : Technology and Engineering;

    Abstract : The Cocktail party problem is a known problem within audiology and relates to a person’s ability to understand and separate speech from a noisy background with multiple speakers. This master’s thesis, in collaboration with Eriksholm Research Center, part of the company Oticon, developed a real-time system to help people with Hearing Impairment (HI) handle this problem by using a microphone array and a Minimum Variance Distortionless Response (MVDR) beamformer. READ MORE