Search for dissertations about: "RADIO FREQUENCY MEASUREMENT"

Showing result 1 - 5 of 99 swedish dissertations containing the words RADIO FREQUENCY MEASUREMENT.

  2. 1. On Radio Frequency Behavioral Modeling : Measurement Techniques, Devices and Validation Aspects

    Author : Per N. Landin; Peter Händel; Magnus Isaksson; Wendy Van Moer; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronics; Elektronik;

    Abstract : Effektförstärkare för radiofrekvensapplikationer utgör fortfarande ett av de största problemen i trådlösa kommunikationssystem. Detta beror på att dessa förstärkare är ickelinjära, har låg energieffektivitet och ger mycket distortioner. Bättre verktyg för att förstå och korrigera dessa beteenden är nödvändiga. READ MORE

  4. 2. Radio Frequency Power Amplifiers : Behavioral Modeling, Parameter Reduction, and Digital Predistortion

    Author : Magnus Isaksson; Peter Händel; José C. Pedro; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation; Electronics;

    Abstract : This work considers behavioral modeling, parameter-reduction, and digital predistortion of radio frequency power amplifiers. Due to the use of modern digital modulation methods, contemporary power amplifiers are frequently subjected to signals characterized by considerable bandwidths and fast changing envelopes. READ MORE

  5. 3. Water content measurement in woody biomass : using dielectric constant at radio frequencies

    Author : Ana Marta Marques Duarte da Paz; Erik Dahquist; Pertti Vainikainen; Mälardalens högskola; []
    Keywords : Energi- och miljöteknik;

    Abstract : The will for replacement of fossil fuels increased the use of woody biomass as fuel in heating and power plants. An important parameter for the use woody biomass as fuel is the water content of biomass as it influences the heating value and thereby the combustion control and pricing. READ MORE

  6. 4. Characterization problems in radio measurement systems

    Author : Tore Lindgren; Zvonimir Sipus; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Abstract : Radio measurement systems may have their performance significantly degraded due to environmental factors such as multipath, weather effects, and mechanical displacements. Characterization of these effects are therefore important in order to ensure functionality of the system. The characterization itself may also be the purpose of the system. READ MORE

  7. 5. The Radio Frequency Single-Electron Transistor: Noise Properties and its Potential for Detecting Electrons on Helium

    Author : Serguei Kafanov; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; single electron transistor; Coulomb blockade; SET; radio;

    Abstract : In this thesis the noise in the single electron transistor (SET) has been investigated.The charge sensitivity for the radio frequency single electron transistor(RF-SET) was measured. The demonstrated result is better than the previouslybest reported value both at 40 mK, and at 4.2 K. READ MORE