Sökning: "Heterodyne Mixer"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Heterodyne Mixer.

  1. 1. Heterodyne mixers based on YBa2Cu3O7-δ

    Författare :Fredrik Rönnung; Chalmers University of Technology; []
    Nyckelord :hot-electron bolometer; high temperature superconductor; pulsed laser deposition; heterodyne detector; submillimeter mixer;

    Sammanfattning : .... LÄS MER

  2. 2. Submillimeter Heterodyne Array for High-speed Radio Astronomy

    Författare :Jean Baubert; Chalmers University of Technology; []
    Nyckelord :HEB; Terahertz technology; Sub-millimetre wave; Hot Electron Bolometer; Heterodyne Mixer;

    Sammanfattning : .... LÄS MER

  3. 3. Antenna Integrated Superconducting Mixers

    Författare :Hans Ekström; Chalmers University of Technology; []
    Nyckelord :tapered slotline antenna; mixer; double dipole antenna; superconducting; hot electron; receiver; Niobium; bolometer; trilayer junction; edge junction; Niobium Nitride; SIS;

    Sammanfattning : This thesis investigates the prospects of some different superconducting mixers integrated with planar antennas for the millimeter and submillimeter regime. Two kinds of Superconductor/Insulator/Superconductor (SIS) tunnel junctions for use in mixers have been fabricated; Nb/PbBi edge junctions and Nb trilayer junctions. LÄS MER

  4. 4. NbN Hot Electron Bolometric Mixers for a Quasi--Optical THz Receiver

    Författare :Matthias Kroug; Chalmers University of Technology; []
    Nyckelord :bolometric mixer; superconducting NbN; heterodyne detection; hot electron effect; quasi-optical;

    Sammanfattning : Experimental work on the development of a quasi-optical heterodyne receiver for the THz frequency range is reported. The mixing device is a superconducting hot electron bolometer (HEB) made from ultrathin, d = 3 - 5 nm, niobium nitride (NbN) films. LÄS MER

  5. 5. MgB2 hot-electron bolometer mixers for sub-mm wave astronomy

    Författare :Evgenii Novoselov; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hot-electron bolometer; gain bandwidth; noise bandwidth; thin film; electron-phonon interaction; noise temperature; THz detector; conversion gain; mixer; magnesium diboride; superconductor;

    Sammanfattning : Spectroscopy and photometry in the terahertz (THz) range of remote space objects allows for a study of their chemical composition, because this range covers rotational lines from simple molecules and electron transition lines from atoms and ions. Due to high spectral resolution, THz heterodyne receivers al- low for studying dynamical properties of space objects manifested in doppler-shifted emission lines. LÄS MER