Sökning: "Antenna"

Visar resultat 1 - 5 av 401 uppsatser innehållade ordet Antenna.

  1. 1. Design and Evaluation of V/UHF Satellite Communication Antennas for Naval Applications

    Master-uppsats, KTH/Elektroteknisk teori och konstruktion

    Författare :Hampus Bäckström; [2018]
    Nyckelord :Antenna design; Antenna simulations; QHA; Submarine communication; SatCom; MUOS; Legacy; Antenndesign; Antennsimulering; QHA; Ubatskommunikation; Satellitkommunikation; MUOS; Legacy;

    Sammanfattning : In this master thesis, compact antenna design aimed towards naval applicationshave been designed, analyzed and evaluated. There is a recentinterest in the development of compact antennas to be used for smallersubmarine models, and with a smaller hull on a submarine, communicationand antenna systems must be adapted and minimized, which limitsantenna design. LÄS MER

  2. 2. RF system for mmWave massive MIMO

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Ziqi Zhou; Jingwei Wang; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Due to rapid developments in communication technology, it is likely that 5G networks will be rolled out in 2019. To adapt to 5G, hardware will have to develop to meet the requirements of this new technology. The mmWave communication is one of the main elements of 5G technology. LÄS MER

  3. 3. Towards Long-Range Backscatter Communication with Tunnel Diode Reflection Amplifiers

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Gustav Eriksson; [2018]
    Nyckelord :Amplified backscatter tag; Reflection amplifier; Battery-free; Long-range communication; Tunnel diode; Ultra-low power consumption; RFID; Frequency shift;

    Sammanfattning : Backscatter communication enables wireless communication at a power consumption orders of magnitude lower than conventional wireless communication. Instead of generating new RF-signals backscatter communication leverages ambient signals, such as WiFi-, Bluetooth- or TV-signals, and reflects them by changing the impedance of the antenna. LÄS MER

  4. 4. 5G Positioning using Machine Learning

    Master-uppsats, Linköpings universitet/Reglerteknik

    Författare :Magnus Malmström; [2018]
    Nyckelord :5G; Positioning; Non Line of Sight NLOS ; Urban Canyons; Machine Learning; Neural Networks; Random Forest; Detection; Neyman-Person; Generalized Likelihood Ratio Test; Kalam Filter;

    Sammanfattning : Positioning is recognized as an important feature of fifth generation (\abbrFiveG) cellular networks due to the massive number of commercial use cases that would benefit from access to position information. Radio based positioning has always been a challenging task in urban canyons where buildings block and reflect the radio signal, causing multipath propagation and non-line-of-sight (NLOS) signal conditions. LÄS MER

  5. 5. Millimeter Wave Antenna Array Calibration and Validation for 5G New Radio Access

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Manuel Jose Lopez Morales; [2018]
    Nyckelord :Technology and Engineering;

    Sammanfattning : This Master thesis work was performed in Ericsson AB, Lund. It studies and validates two classes of algorithms to be used in mm-wave massive MIMO antenna arrays, for their use in the future 5G mobile communication systems. LÄS MER

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