Search for dissertations about: "d-band"

Showing result 1 - 5 of 13 swedish dissertations containing the word d-band.

  1. 1. Design and Characterization of D-band Monolithic Direct Carrier Modulator and Demodulator Circuits for High Speed Wireless Communication

    Author : Sona Carpenter; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modulator; MMIC; Double-Heterojunction Bipolar Transistor DHBT ; demodulator; balun; D-band; InP; Gilbert cell; Quadrature; differential coupler;

    Abstract : Millimeter waves are finding increasing applications in data communication, sensing,imaging and radio astronomy. One application is in high-speed wireless back-haul networksfor mobile communication. The operators are interested in replacing optical fiber withthe more flexible and easy to deploy wireless link. READ MORE

  2. 2. Non-galvanic Interconnects for Millimeter-wave Systems

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Ahmed Adel Hassona; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MMIC; THz; CMOS; taper; InP; LTSA; millimeter-wave; slot antenna; waveguide transition; SiC; GaAs; eWLB; finline; WR-6.5.; interconnects; D-band;

    Abstract : Fueled by the increasing demand for higher data rates, millimeter-wave (mmW) systems emerged as a candidate that can provide multi-gigabit per second (Gb/s) transmission. This demand is mainly driven by modern communication systems and several other wireless and sensing applications such as production quality inspection and imaging systems. READ MORE

  3. 3. Millimeter-wave Transceiver ICs for Ultrahigh Data Rate Communications Using Advanced III-V and Silicon Technologies

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Sona Carpenter; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SiGe BiCMOS; single chip; MMIC; high-order modulation; frequency multiplier; 110-170 GHz; high data rate; InP DHBT; demodulator; transmitter; QAM; receiver; point-to-point radio.; 5G; D-band; QPSK; I Q modulator; millimeter-wave communication; direct conversion; Gilbert-cell mixer;

    Abstract : Today’s main driving parameter for radio transceiver research is the ability to provide high capacity while maintaining low cost, small form factor, and low power consumption. Direct conversion architectures (due to the feasibility of monolithic integration) at millimeter-wave (due to wideband availability) have attracted large interest in recent years because of their potential to meet these demands. READ MORE

  4. 4. Electronic structure and spectroscopy calculations in fuel cell catalysis

    University dissertation from Henrik Öberg

    Author : Henrik Öberg; Stockholms universitet.; [2011]
    Keywords : Chemical Physics; kemisk fysik;

    Abstract : This thesis presents joint experimental and theoretical studies of surface phenomena at an electronic structure level in proton exchange membrane fuel cells (PEM-FC's).The fuel cell activity can be related to the oxygen reduction taking place at the cathodic surface through the oxygen reduction reaction (ORR). READ MORE

  5. 5. Toward first-principles understanding of carbonitride precipitation in steels

    University dissertation from Henrik Öberg

    Author : Dan Fors; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Steels; Coarsening; Interfaces; Peierls-Nabarro model; Diffusion; Precipitates; Density functional theory; Dislocation network; Misfit; Electronic structure;

    Abstract : The most important and widely used group of metallic alloys is steels, whichare alloys of the element iron together with carbon and usually other elementssuch as B, N, V, Nb and Cr. The strength in these alloys is closely connectedto the distribution of point defects, precipitates and grain boundaries whicheffectively act as obstacles for dislocation migration. READ MORE