Sökning: "RF amplifiers"

Visar resultat 1 - 5 av 55 avhandlingar innehållade orden RF amplifiers.

  1. 1. Design and Analysis of Highly Linear Integrated Wideband Amplifiers

    Författare :Henrik Sjöland; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CMOS; nonlinearity cancellation; intermodulation distortion; RF amplifiers; IF amplifiers; audio amplifiers; power amplifiers; wideband amplifiers; analog integrated circuits; low voltage; amplifiers; distortion; bipolar; Electronics; Elektronik;

    Sammanfattning : This dissertation deals with techniques for designing integrated amplifiers with high linearity. Amplifiers with operating frequencies from Audio to RF have been built. An enhanced feedback configuration, capable of very low distortion, is presented. LÄS MER

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

    Författare :Renbin Tong; Dragos Dancila; Jörgen Olsson; Olof Bengtsson; Zoya Popovic; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  5. 4. Optimization of LDMOS Transistor in Power Amplifiers for Communication Systems

    Författare :Ahsan-Ullah Kashif; Qamar-ul Wahab; Christer Svensson; Joachim Wurfl; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; RF-LDMOS; power amplifiers; technology CAD; load-pull; non-linear analysis; and switching analysis; Semiconductor physics; Halvledarfysik;

    Sammanfattning : The emergence of new communication standards has put a key challenge for semiconductor industry to develop RF devices that can handle high power and high data rates simultaneously. The RF devices play a key role in the design of power amplifiers (PAs), which is considered as a heart of base-station. LÄS MER

  7. 5. Efficient and Wideband Load Modulated Power Amplifiers for Wireless Communication

    Författare :Han Zhou; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GaN; energy efficiency; load modulation; Combiner synthesis; RF; wideband; Doherty; power amplifier; CLMA; SCLMA; microwave;

    Sammanfattning : The increasing demand for mobile data traffic has resulted in new challenges and requirements for the development of the wireless communication infrastructure. With the transition to higher frequencies and multi-antenna systems, radio frequency (RF) hardware performance, especially the power amplifier (PA), becomes increasingly important. LÄS MER