Search for dissertations about: "RF power"

Showing result 1 - 5 of 175 swedish dissertations containing the words RF power.

2. 1. Efficient Solid-State Power Amplifiers for RF Power Source Applications

   Author : Renbin Tong; Dragos Dancila; Jörgen Olsson; Olof Bengtsson; Zoya Popovic; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; back-off efficiency; high efficiency; power source; RF energy; RF measurements; radioisotope production; solid-state power amplifiers; Engineering Science with specialization in Microwave Technology; Teknisk fysik med inriktning mot mikrovågsteknik;

   Abstract : Radio Frequency (RF) power sources are extensively applied in various fields. Radioisotope production, i.e., the production of short-lived radioactive isotopes, for positron emission tomography (PET) is one of the most important applications in the medical and healthcare domains. READ MORE

4. 2. Design and Characterization of RF-Power LDMOS Transistors

   Author : Olof Bengtsson; Jörgen Olsson; Lars Vestling; Claes Beckman; Olof Tornblad; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Power Amplifiers; LDMOS transistors; RF-power; IMD; Technology CAD; Load-Pull; Electronics; Elektronik;

   Abstract : In mobile communication new applications like wireless internet and mobile video have increased the demand of data-rates. Therefore, new more wideband systems are being implemented. READ MORE

5. 3. High Frequency Analysis of Silicon RF MOS Transistors

   Author : Johan Ankarcrona; Jörgen Olsson; Kjell Jeppson; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; RF-power; LDMOS; Microwave transistor; SOI; Silicon; MOSFET; Elektronik; Electronics; Elektronik;

   Abstract : Today, the silicon technology is well established for RF-applications (f~1-100 GHz), with emphasis on the lower frequencies (f < 5 GHz). The field of RF power devices is extensive concerning materials and devices. One of the important RF-devices is the silicon LDMOS transistor. READ MORE

6. 4. Nanowire Transistors and RF Circuits for Low-Power Applications

   Author : Karl-Magnus Persson; Institutionen för elektro- och informationsteknik; []
   Keywords : InAs; Nanowire; Metal-oxide-semiconductor field-effect transistor; MOSFET; RF; Mixer; Circuit; 1 f-noise; Simulation; Modelling;

   Abstract : The background of this thesis is related to the steadily increasing demand of higher bandwidth and lower power consumption for transmitting data. The work aims at demonstrating how new types of structures, at the nanoscale, combined with what is referred to as exotic materials, can help benefit in electronics by lowering the consumed power, possibly by an order of magnitude, compared to the industry standard, silicon (Si), used today. READ MORE

7. 5. Simulation and Optimization of SiC Field Effect Transistors

   Author : Kent Bertilsson; Hans-Erik Nilsson; Christian Brylinski; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; SiC; Device simulation; RF; power; MESFET; Elektronik; Electronics; Elektronik;

   Abstract : Silicon Carbide (SiC) is a wide band-gap semiconductor material with excel-lent material properties for high frequency, high power and high temperature elec-tronics. In this work different SiC field-effect transistors have been studied using theoretical methods, with the focus on both the devices and the methods used. READ MORE