Sökning: "low-noise amplifier"

Visar resultat 1 - 5 av 42 avhandlingar innehållade orden low-noise amplifier.

  1. 1. GaN HEMT Low Noise Amplifiers for Radio Base Station Receivers

    Detta är en avhandling från Chalmers University of Technology

    Författare :Pirooz Chehrenegar; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; radio base station receiver; high electron mobility transistor HEMT ; gallium nitride GaN ; low noise amplifier; cascode; cascade; high linearity; low noise; robustness.;

    Sammanfattning : Gallium nitride (GaN) high electron mobility transistor (HEMT) has been introduced as the technology of choice for high power microwave applications due to its material properties including high saturation electron velocity and breakdown field together with excellent thermal conductivity and robustness. It is also a promising candidate for receiver front-ends in the radio base station(RBS) where low noise figure and high linearity are key issues for low noise amplifier (LNA) design. LÄS MER

  2. 2. Cryogenic low noise amplifiers for microwave frequencies

    Detta är en avhandling från Chalmers University of Technology

    Författare :Jianguo Xu; Chalmers tekniska högskola.; Chalmers University of Technology.; [1995]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; low-noise amplifier; cryogenic; noise measurement; microwave; millimeter-wave; HEMT; HFET; MODFET; TEGFET; FET noise model; computer-aided design;

    Sammanfattning : .... LÄS MER

  3. 3. Development of Cryogenic Low Noise 4-8 GHz HEMT Amplifier and its Advanced Characterization

    Detta är en avhandling från Chalmers University of Technology

    Författare :Erik Sundin; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektronik; Electronics; Elektronisk mät- och apparatteknik; Electronic measurement and instrumentation; low noise amplifier; cryogenic amplifier; HEMT; noise measurement; sis; shot-noise;

    Sammanfattning : In most radio astronomy instrumentation, cryogenic low noise amplifiers (LNA) are used as intermediate frequency (IF) amplifiers. The system noise temperature is among the most important parameters of a receiver and requires state of the art components. LÄS MER

  4. 4. Ultra-Low Power InAs/AlSb HEMTs for Cryogenic Low-Noise Applications

    Detta är en avhandling från Chalmers University of Technology

    Författare :Giuseppe Moschetti; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; InAs AlSb; high electron mobility transistor HEMT ; metamorphic; cryogenic; low power; high frequency; low noise; ion implantation;

    Sammanfattning : The InAs/AlSb high electron mobility transistor (HEMT) is an emerging microwave device technology for ultra-low power and low noise applications. Due to the low bandgap (0. LÄS MER

  5. 5. Instrumental and observational studies in radio astronomy : low noise amplifier design and methanol maser research

    Detta är en avhandling från Chalmers University of Technology

    Författare :Vincent Minier; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [1998]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HII regions; masers; stars: formation; circumstellar matter; techniques: interferometric; low noise amplifier; matching circuitry design; microwave; HEMT;

    Sammanfattning : .... LÄS MER