Sökning: "subharmonic mixers"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden subharmonic mixers.

  1. 1. Fabrication, Characterisation and Modelling of Subharmonic Graphene FET Mixers

    Författare :Omid Habibpour; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gate dielectric; Graphene; harmonic balance analysis.; subharmonic resistive mixers; microwave FETs; device modelling;

    Sammanfattning : Graphene has exceptional carrier transport properties which makes it a promising material for future nanoelectronics. The high carrier mobility along with the ability to switch between n- and p-channel in a graphene field effect transistor (G-FET) truly distinguishes it from other types of FET technologies and enables completely new high frequency devices. LÄS MER

  3. 2. Advanced Schottky Diode Receiver Front-Ends for Terahertz Applications

    Författare :Peter Sobis; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; terahertz electronics; TRL-calibration; frequency converters; down converters; phase shifters; S-parameter measurements; Schottky diodes; subharmonic mixers; radiometers; terahertz technology; submillimetre wave technology; heterodyne receivers; differential phase shifters; sideband separating mixers;

    Sammanfattning : This thesis treats the development of high frequency circuits for increased functionality of terahertz receiver front-ends based on room temperature Schottky diode technology. This includes the study of novel circuit integration schemes, packaging concepts as well as new measurement and characterisation techniques. LÄS MER

  4. 3. Characterisation and Modelling of Graphene FETs for Terahertz Mixers and Detectors

    Författare :MICHAEL ANDERSSON; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; graphene; millimetre and submillimetre waves; power detectors; nonlinear device modelling; microwave amplifiers; nanofabrication; integrated circuits; noise modelling; Field-effect transistors FETs ; terahertz detectors; Volterra; subharmonic resistive mixers;

    Sammanfattning : Graphene is a two-dimensional sheet of carbon atoms with numerous envisaged applications owing to its exciting properties. In particular, ultrahigh-speed graphene field effect transistors (GFETs) are possible due to the unprecedented carrier velocities in ideal graphene. LÄS MER

  5. 4. Heterostructure Field Effect Transistors and Millimeter Wave Integrated Circuits

    Författare :Niklas Rorsman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; subharmonic; resistive mixer; Modulation Doped Field Effect Transistor MODFET ; heterostructure field effect transistor HFET ; monolithic microwave integrated circuits MMIC ; frequency multiplier; amplifier; III-V semiconductor; small signal model; electron beam lithography; High Electron Mobility Transistor HEMT ; large signal model; pseudomorphic;

    Sammanfattning : This thesis deals with the research and development of HFETs and HFET based circuits. One of the main aims of the work presented in this thesis has been to develop processes to fabricate state of the art devices and circuits. LÄS MER

  7. 5. Graphene FETs in Microwave Applications

    Författare :Omid Habibpour; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave amplifiers; S-parameters characterisation; device modelling; MMIC; device fabrication; Graphene; subharmonic resistive mixers; integrated circuits; harmonic balance analysis; microwave FETs;

    Sammanfattning : Graphene is a one-atom-thick sheet of carbon with numerous impressive properties. It is a promising material for future high-speed nanoelectronics due to its intrinsic superior carrier mobility and very high saturation velocity. LÄS MER