Sökning: "LNA"

Visar resultat 21 - 25 av 73 avhandlingar innehållade ordet LNA.

  1. 21. High Performance LNAs and Mixers for Direct Conversion Receivers in BiCMOS and CMOS Technologies

    Författare :TOBIAS TIRED; Institutionen för elektro- och informationsteknik; []
    Nyckelord :LNA; mixer; direct conversion receiver;

    Sammanfattning : The trend in cellular chipset design today is to incorporate support for a larger number of frequency bands for each new chipset generation. If the chipset also supports receiver diversity two low noise amplifiers (LNAs) are required for each frequency band. This is however associated with an increase of off-chip components, i.e. LÄS MER

  3. 22. Integrated Transceivers for Millimeter Wave and Cellular Communication

    Författare :TOBIAS TIRED; Institutionen för elektro- och informationsteknik; []
    Nyckelord :receiver; LNA; mixer; bipolar; BiCMOS; SiGe; mm-wave; E-band; transmitter; PLL; PA; beam steering;

    Sammanfattning : Abstract:This doctoral thesis is addresses two topics in integrated circuit design: multiband direct conversion cellular receivers for cellular frequencies and beam steering transmitters for millimeter wave communication for the cellular backhaul. The trend towards cellular terminals supporting ever more different frequency bands has resulted in complex radio frontends with a large number of RF inputs. LÄS MER

  4. 23. Low-Noise Amplifier Design for Ultra-Wideband Systems

    Författare :Adriana Serban Craciunescu; Linköpings universitet; []
    Nyckelord :TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The low-noise amplifier (LNA) remains a critical block in every receiver front-end. As the development of the widcband, low-power and low-cost wireless systems continues, new LNA topologies and design methodologies have become one of the most interesting challenges in the field of radio frequency system design. LÄS MER

  5. 24. GaN HEMT Low Noise Amplifiers for Radio Base Station Receivers

    Författare :Pirooz Chehrenegar; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gallium nitride GaN ; radio base station receiver; cascode; high linearity; robustness.; cascade; high electron mobility transistor HEMT ; low noise; low noise amplifier;

    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 noiseamplifier (LNA) design. LÄS MER

  7. 25. Development of nonviral gene delivery and of anti-gene reagents

    Författare :Rongbin Ge; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Although significant progress has been made in the basic science and applications of various non-viral gene delivery systems, the majority of non-viral approaches are still much less efficient than viral vectors, especially for in vivo gene delivery, Therefore, non-viral gene delivery must be developed in order to increase the efficiency of in vivo delivery. Moreover, a novel anti-gene reagent was developed for sequence-specific gene silencing. LÄS MER