Sökning: "gallium nitride GaN"

Visar resultat 41 - 43 av 43 avhandlingar innehållade orden gallium nitride GaN.

  1. 41. Extending the Bandwidth of the Doherty Power Amplifier

    Författare :David Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The Doherty power amplifier (DPA) is one of the most popular power amplifier (PA) architectures used to obtain high efficiency for modern communication signals having high peak-to-average power ratios. Its often narrowband performance does, however, make it difficult for the DPA to meet the increasing demands of frequency agility in modern wireless communication systems. LÄS MER

  3. 42. High Temperature Bipolar SiC Power Integrated Circuits

    Författare :Saleh Kargarrazi; Carl-Mikael Zetterling; Ana Rusu; Shankar Narayanan Ekkanath Madathil; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : In the recent decade, integrated electronics in wide bandgap semiconductor technologies such as Gallium Nitride (GaN) and Silicon Carbide (SiC) have been shown to be viable candidates in extreme environments (e.g high-temperature and high radiation). Such electronics have applications in down-hole drilling, automobile-, air- and space- industries. LÄS MER

  4. 43. Chemical fabrication of ZnO nanostructures and their emission properties: Cholesterol biosensing applications utilizing ZnO and Graphene

    Författare :Muhammad Israr Qadir; Magnus Willander; Omer Nour; Jinhui Song; Linköpings universitet; []
    Nyckelord :Zinc oxide; aqueous chemical synthesis; nanostructures; light emitting diode; electrochemical biosensor.; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Zinc oxide (ZnO) is an inorganic compound, owing to wide band gap and large binding energy, and holds promising potential in the fields of semiconducting as well as piezoelectric applications with excellent stability and reliability. In addition, ZnO has a plenteous number of nanoscale structures containing unique physical, chemical, electrical, sensing and optical properties. LÄS MER