Search for dissertations about: "microwave oscillators"

Showing result 1 - 5 of 25 swedish dissertations containing the words microwave oscillators.

  1. 1. Determining and Optimizing the Current and Magnetic Field Dependence of Spin-Torque and Spin Hall Nano-Oscillators Toward Next-Generation Nanoelectronic Devices and Systems

    Author : Seyed Amir Hossein Banuazizi; Johan Åkerman; Erik Wahlström; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; nanoelectronics; spintronics; nanomagnetism; ferromagnetic materials; microwave oscillators; magnetization dynamics; spin waves; giant magneto-resistance; spin Hall effect; spin-torque nano-oscillators; spin Hall nano-oscillators; numerical modeling; electrical characterization; microwave characterization; magnetic force microscopy.; Physics; Fysik; Materials Science and Engineering; Teknisk materialvetenskap; Informations- och kommunikationsteknik; Information and Communication Technology; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Spin-torque and spin Hall nano-oscillators are nanoscale devices (about 100 nm) capable of producing tunable broadband high-frequency microwave signals ranging from 0.1 GHz to over 65 GHz that several research groups trying to reach up to 200 - 300 GHz. READ MORE

  2. 2. Piezoelectric and ferroelectric device technologies for microwave oscillators

    Author : Martin Norling; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; piezoelectrics; electrostrictive materials; microwave oscillators; thin film devices; ferroelectrics; thin film bulk acoustic resonators; ferroelectric varactors;

    Abstract : The purpose of this thesis is to investigate piezoelectric and ferroelectric thin film device technologies for application in microwave oscillators.Thin film varactors based on ferroelectric materials are considered. READ MORE

  3. 3. Linear, Non-Linear, and Synchronizing Spin Wave Modes in Spin Hall Nano-Oscillators

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hamid Mazraati; Johan Åkerman; Dario Arena; [2018]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; spin Hall effect; spin Hall nano-oscillators; threshold current; microwave; spin wave; synchronization; Physics; Fysik;

    Abstract : Spin Hall nano-oscillators (SHNOs) are nanoscale spintronic devices that generate microwave signals with highly tunable frequency. This thesis focuses on improving the signal quality of nanoconstriction-based SHNOs and also on developing a better understanding of their magnetization dynamics. READ MORE

  4. 4. Magnetization Dynamics in Nano-Contact Spin Torque Oscillators Solitonic bullets and propagating spin waves

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Stefano Bonetti; Johan Åkerman; Thomas Silva; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnetism; spintronics; thin magnetic films; spin transfer torque; magnetization dynamics; spin waves; microwave oscillators; giant magneto-resistance; NATURAL SCIENCES Physics Condensed matter physics Magnetism; NATURVETENSKAP Fysik Kondenserade materiens fysik Magnetism;

    Abstract : Magnetization dynamics in nano-contact spin torque oscillators (STOs) is investigated from an experimental and theoretical point of view. The fundamentals of magnetization dynamics due to spin transfer torque are given.A custom-made high frequency (up to 46 GHz) in large magnetic fields (up to 2. READ MORE

  5. 5. Low phase noise voltage controlled micro- and millimeter wave oscillators

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Stefan Andersson; [1998]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; radio; anti series; microstrip resonator; silicon bipolar transistor; amplitude limiter; cavity resonator; varactor; transposed gain; MESFET; automatic gain control; VCO; delay line; laser; RF; oscillation criteria; millimetre wave; oscillator; mm-wave; noise; multiplier; fibre optic; SAW; DRO; PLL; surface acoustic wave; Si BJT; 1 f noise; FM noise; HEMT; clipping diode; HBT; YIG sphere; device; terfenol; gunn diode; stabilised; YIG film; quarts crystal; phase locked loop; magnetostrictive; resonator; phase error; whispering gallery mode; sapphire resonator; Fabry-Perot resonator; PHEMT; microwave; HFET; phase noise; DR; dielectric resonator; PM noise; balanced oscillator; piezo electric; AGC; frequency discriminator;

    Abstract : .... READ MORE