Sökning: "dual band"

Visar resultat 1 - 5 av 34 uppsatser innehållade orden dual band.

  1. 1. Investigating self-discharge in a graphite dual-ion cell using in-situ Raman spectroscopy.

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Strukturkemi

    Författare :Ismail Yussuf Hassan; [2023]
    Nyckelord :graphite; dual-ion battery; parasitic reaction; cathode-electrolyte interface; anion intercalation; concentrated electrolyte; self-discharge; Raman spectroscopy;

    Sammanfattning : Anion intercalation in the graphite positive electrode of a dual-ion battery requires high potential (> 4.3 V vs Li+/Li), which aggravates parasitic reactions involving electrolyte decomposition and Al corrosion, manifesting in poor coulombic efficiency, cycle life, and quick self-discharge. LÄS MER

  3. 2. Antenna Arrays for Dual-Frequency Harmonic Radar Application

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

    Författare :Venkatesh Raja; Mohammad Zafar Mohammad; [2023]
    Nyckelord :Technology and Engineering;

    Sammanfattning : The aim of this thesis is to design two patch antenna arrays for dual-frequency harmonic radar application, one for the transmitter and the other for the receiver. The arrays are used to track the Bogong moth that migrates from the countryside to the Australian Alps during spring. LÄS MER

  4. 3. A Low Noise Digitally Controlled Oscillator for a Wi-Fi 6 All-Digital PLL

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

    Författare :Tommy Lundberg; [2023]
    Nyckelord :Digitally Controlled Oscillator; All-Digital Phase Locked Loop; Oscillator; Low Phase Noise; Class-C oscillator; Dual-Core; Dynamic BiasingCircuit; Digitalt Styrd Oscillator; Digital PLL; Lågt Fasbrus; Klass-C Oscillator; Dubbelkärnig; Dynamisk Bias-Krets;

    Sammanfattning : Following the rise of Internet of Things (IoT), or just the technological advancements and expectations in a world where the things are or will be connected, new demands are put on Integrated Circuit (IC) for wireless connectivity. The use cases seem endless; smart home, healthcare, entertainment, and science are all areas that can benefit from connectivity of low power electronics. LÄS MER

  5. 4. Coexistence of Dual Inductive Wireless Power Transfer Systems

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

    Författare :Eneas Hållsten; [2022]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Wireless power transfer is emerging into everyday life. The idea is to create a more convenient way of charging, or at least powering, devices. LÄS MER

  7. 5. A Modular Approach to Design and Implementation of an Active GNSS Antenna

    Master-uppsats, Linköpings universitet/Fysik, elektroteknik och matematik; Linköpings universitet/Tekniska fakulteten

    Författare :Ulrik Hecktor; [2022]
    Nyckelord :GNSS; RTK; circular patch antenna; LNA; stacked patch antenna;

    Sammanfattning : This master’s thesis describes the design, implementation and testing of an active antenna intended for use with global navigation satellite systems. The active antenna is composed of two major parts, a dual-band circular patch antenna and a dual-band low-noise amplifier. To streamline the design process, a modular solution was adopted. LÄS MER