Sökning: "transmission line"

Visar resultat 1 - 5 av 228 avhandlingar innehållade orden transmission line.

  1. 1. Estimation and detection of transmission line characteristics in the copper access network

    Författare :Fredrik Lindqvist; Lunds universitet.; Lund University.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Digital subscriber line; DSL; line qualification; twisted-pair line; copper access network; cable modeling; crosstalk channel estimation; estimation; detection;

    Sammanfattning : The copper access-network operators face the challenge of developing and maintaining cost-effective digital subscriber line (DSL) services that are competitive to other broadband access technologies. The way forward is dictated by the demand of ever increasing data rates on the twisted-pair copper lines. LÄS MER

  2. 2. Some studies on metamaterial transmission lines and their applications

    Detta är en avhandling från Stockholm : KTH

    Författare :Xin Hu; KTH.; [2009]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; metamaterial; transmission line theory; composite right left-handed transmission line; diplexer; coupler; balun; interdigital capacitor; split ring resonator; TECHNOLOGY Electrical engineering; electronics and photonics Electrical engineering; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik Elektroteknik;

    Sammanfattning : This thesis focuses mostly on investigating different potential applications of meta-transmission line (TL), particularly composite right/left handed (CRLH) TL, and analyzing some new phenomena and applications of meta-TL, mostly left-handed (LH) TL. Realization principle will also be studied. LÄS MER

  3. 3. Slow propagation line-based superconducting devices for quantum technology

    Detta är en avhandling från Stockholm : KTH

    Författare :Astghik Adamyan; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; superconducting transmission line; electron spin resonance; parametric amplifier; near field scanning microwave microscopy; tunable microstrip resonator;

    Sammanfattning : In the field of circuit quantum electrodynamics (c-QED), the coherent interaction of two-level systems (TLSs) with photons, confined in a superconducting microwaveresonator, opens up new possibilities for quantum computing experiments.This thesis contributes to the expansion of c-QED tool-box with slow propagation line-based solutions for ubiquitous techniques, such as cryogenic Near Field Scanning Microwave Microscopy (NSMM), Electron Spin Resonance (ESR) spectroscopy and Traveling Wave Parametric Amplifier (TWPA). LÄS MER

  4. 4. Modelling and control of a line-commutated HVDC transmission system interacting with a VSC STATCOM

    Detta är en avhandling från Stockholm : KTH

    Författare :Paulo Fischer de Toledo; KTH.; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Keywords : HVDC transmission; LCC – Line-commutated Current-source Converter; STATCOM; VSC – Voltage Source Converter; Space-Vector complex vector ; transfer-function; frequency-domain analysis; TECHNOLOGY Electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik;

    Sammanfattning : The interaction of an HVDC converter with the connected power system is of complex nature. An accurate model of the converter is required to study these interactions. The use of analytical small-signal converter models provides useful insight and understanding of the interaction of the HVDC system and the connected system components. LÄS MER

  5. 5. Monocrystalline-Silicon Based RF MEMS Devices

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Mikael Sterner; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; RF MEMS; radio frequency; microelectromechanical system; microsystem technology; monocrystalline silicon; switch; tuneable capacitor; high-impedace surface; phase shifter; rectangular waveguide; transmission line;

    Sammanfattning : This thesis presents novel radio-frequency microelectromechanical (RF MEMS) devices, for microwave and millimeter wave applications, designed for process robustness and operational reliability using monocrystalline silicon as structural material. Two families of RF MEMS devices are proposed. LÄS MER