Search for dissertations about: "RF circuits"

Showing result 1 - 5 of 88 swedish dissertations containing the words RF circuits.

  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. Vertical InAs Nanowire Devices and RF Circuits

    Author : Martin Berg; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MOSFET; Metal-oxide-semiconductor field-effect transistor; Transistor; Vertical; InAs; III-V semiconductor; Nanowire; Fabrication; DC; Resistor; TLM; RF; Mixer; Circuit.;

    Abstract : Recent decades have seen an exponential increase in the functionality of electronic circuits, allowing for continuous innovation, which benefits society. This increase in functionality has been facilitated by scaling down the dimensions of the most important electronic component in modern electronics: the Si-based MOSFET. READ MORE

  5. 3. Linear Transmitter Design Using Nonlinear Analog Circuits

    Author : Bo Shi; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication engineering; Elektronik och elektroteknik; Electronics and Electrical technology; BiCMOS.; CMOS; ASIC; Radio-frequency circuits; Translinear circuits; RF power amplifier linearization; Linear transmitter; Nonlinear analog circuits; Telekommunikationsteknik;

    Abstract : This dissertation deals with analog techniques at both the architecture and circuit design levels for designing power efficient linear radio-frequency (RF) transmitters. The use of nonlinear analog integrated circuits to implement certain critical signal processing functions for the multiplicative feedback and LINC techniques is investigated with the aim of improving the system performance in terms of complexity, linearity and power efficiency. READ MORE

  6. 4. Programmable and Tunable Circuits for Flexible RF Front Ends

    Author : Naveed Ahsan; Aziz Ouacha; Sten Gunnarsson; Linköpings universitet; []
    Keywords : Microwave circuits; phase shifters; programmable circuits; active corporate feed network; four-port circuit; generic cells; phase shift capability; programmable microwave function array; tunable recursive filter; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Most of today’s microwave circuits are designed for specific function and specialneed. There is a growing trend to have flexible and reconfigurable circuits. Circuitsthat can be digitally programmed to achieve various functions based on specific needs. READ MORE

  7. 5. 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