Sökning: "Devices"

Visar resultat 1 - 5 av 3141 avhandlingar innehållade ordet Devices.

1. 1. AlN Thin Film Electroacoustic Devices

   Författare :Gonzalo Fuentes Iriarte; I.V. Katardjiev; G.F. Iriarte; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; elektronik; Electronics;

   Sammanfattning : Recently, the enormous growth in personal communications systems (PCS), satellite communication and various other forms of wireless data communication has made analogue frequency control a key issue as the operation frequency increases to the low/medium GHz range. Surface acoustic wave (SAW) and bulk acoustic wave (BAW) electroacoustic devices are widely used today in a variety of applications both in consumer electronics as well as in specialized scientific and military equipment where frequency control is required. LÄS MER

3. 2. Silicon Carbide Microwave Devices

   Författare :Joakim Eriksson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SBD; high-power microwave devices; Silicon Carbide; diode mixer; wide band gap devices; physical simulations; resistive mixer; microwave devices; MESFET; Schottky diode;

   Sammanfattning : This work deals with silicon carbide (SiC) microwave devices. It treats two devices; the Schottky diode and the metal semiconductor field effect transistor (MESFET). Different MESFET materials, fabrication processes, theoretical models for physical simulation, and device models are presented. LÄS MER

4. 3. Devices. On Hospitality, Hostility and Design

   Författare :Martin Avila; Göteborgs universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Device; hospitality; hostility; design; languaging; accident; ecology; symbiosis; autopoiesis; umwelt; Device;

   Sammanfattning : This thesis studies and speculates upon the interrelations of artefacts with human and nonhuman agents. These interrelations form assemblages, some of which have emergent properties, becoming manifestations of processes that we cannot fully control or understand. LÄS MER

5. 4. Water oxidation : From Molecular Systems to Functional Devices

   Författare :Quentin Daniel; Licheng Sun; Marc Robert; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Water oxidation; Renewable energy; Electrochemistry; EPR; Devices; Molecular system; Characterization; Kemi; Chemistry;

   Sammanfattning : The production of hydrogen gas, through the process of water splitting,is one of the most promising concepts for the production of clean andrenewable fuel.The introduction of this thesis provides a brief overview of fossil fuelsand the need for an energy transition towards clean and renewable energy. LÄS MER

7. 5. Silicon-based Photonic Devices : Design, Fabrication and Characterization

   Författare :Ziyang Zhang; Min Qiu; Thomas Koch; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Photonic Devices; Silicon Photonics; Parallel Computation; Nanofabrication; Electron Beam Lithography; Optical Characterisation; Optics; Optik;

   Sammanfattning : The field of Information and Communication Technologies is witnessing a development speed unprecedented in history. Moore’s law proves that the processor speed and memory size are roughly doubling each 18 months, which is expected to continue in the next decade. LÄS MER