Search for dissertations about: "53 GHz"

Showing result 1 - 5 of 9 swedish dissertations containing the words 53 GHz.

  1. 1. Mixers and Multifunctional MMICs for Millimeter-Wave Applications

    University dissertation from Chalmers University of Technology

    Author : Sten E. Gunnarsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektronik; Electronics; 53 GHz; 60 GHz; 220 GHz; balanced resistive mixer; broadband wireless communication; double-balanced Gilbert mixer; dual-quadrature mixer; drain mixer; G-band; GaAs; high data rate; image reject mixer; mHEMT; mixer; MMIC; multifunctional; pHEMT; radiometer; receiver; resistive mixer; single-chip; sub-harmonically pumped resistive mixer; transmitter; V-band.;

    Abstract : This thesis treats the design and characterization of different mixer and multifunctional monolithic microwave integrated circuits (MMICs) in GaAs pHEMT and mHEMT technologies. The MMICs operate at the V (50 – 75 GHz) and G (140 – 220 GHz) bands and several of them demonstrate state-of-the-art performance, level of integration, novel topologies, and/or novel functionality. READ MORE

  2. 2. High-efficiency Power Amplification Techniques for Wireless Transmitters

    University dissertation from Chalmers University of Technology

    Author : Hossein Mashad Nemati; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; elektronik och fotonik; Electrical engineering; electronics and photonics; Elektronik; Electronics; Elektroteknik; Electrical engineering; Power amplifier; efficiency; LDMOS; GaN HEMT; GaAs mHEMT; supply modulation; load modulation; wireless communications.;

    Abstract : The low efficiency of existing power amplifiers (PAs) is causing excessive energy consumption in wireless systems. Improving the PA efficiency is therefore of great environmental and economical importance. READ MORE

  3. 3. Design of High-Speed Time-Interleaved Delta-Sigma D/A Converters

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Ameya Bhide; Linköpings universitet.; Linköpings universitet.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Digital-to-analog (D/A) converters (or DACs) are one the fundamental building blocks of wireless transmitters. In order to support the increasing demand for highdata-ate communication, a large bandwidth is required from the DAC. READ MORE

  4. 4. Wide Bandgap Semiconductor (SiC & GaN) Power Amplifiers in Different Classes

    University dissertation from Institutionen för fysik, kemi och biologi

    Author : Sher Azam; Linköpings universitet.; Linköpings universitet.; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wide bandgap; SiC; MESFET; GaN; HEMT; Power Amplifiers; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap;

    Abstract : SiC MESFETs and GaN HEMTs have an enormous potential in high-power amplifiers at microwave frequencies due to their wide bandgap features of high electric breakdown field strength, high electron saturation velocity and high operating temperature. The high power density combined with the comparably high impedance attainable by these devices also offers new possibilities for wideband power microwave systems. READ MORE

  5. 5. Efficient Integrated Circuits for Wideband Wireless Transceivers

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Quoc-Tai Duong; Linköpings universitet.; Linköpings universitet.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The proliferation of portable communication devices combined with the relentless demand for higher data rates has spurred the development of wireless communication standards which can support wide signal bandwidths. Benefits of the complementary metal oxide semiconductor (CMOS) process such as high device speeds and low manufacturing cost have rendered it the technology of choice for implementing wideband wireless transceiver integrated circuits (ICs). READ MORE