Sökning: "D-band"

Visar resultat 1 - 5 av 20 avhandlingar innehållade ordet D-band.

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

    Författare :Sona Carpenter; Chalmers University of Technology; []
    Nyckelord :modulator; MMIC; Double-Heterojunction Bipolar Transistor DHBT ; demodulator; balun; D-band; InP; Gilbert cell; Quadrature; differential coupler;

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  4. 4. MMIC-based Low Phase Noise Millimetre-wave Signal Source Design

    Författare :Thi Ngoc Do Thanh; Chalmers University of Technology; []
    Nyckelord :millimetre-wave; MMIC; low frequency noise; phase noise; GaN HEMT; signal source; D-band; InP DHBT; deposition method.; SiGe BiCMOS; frequency multiplier; VCO; passivation;

    Sammanfattning : Wireless technology for future communication systems has been continuously evolving to meet society’s increasing demand on network capacity. The millimetre-wave frequency band has a large amount of bandwidth available, which is a key factor in enabling the capability of carrying higher data rates. LÄS MER

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

    Författare :Henrik Öberg; Lars G.M. Pettersson; Göran Lindbergh; Stockholms universitet; []
    Nyckelord :Chemical Physics; kemisk fysik;

    Sammanfattning : 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). LÄS MER