Search for dissertations about: "Superconductor-Insulator-Superconductor mixers"

Found 5 swedish dissertations containing the words Superconductor-Insulator-Superconductor mixers.

  1. 1. Design Of Dual Polarisation Sideband Separation Mixer For ALMA Band 5

    Author : Bhushan Billade; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter wave receivers; Millimeter wave mixers; Superconductor-Insulator-Superconductor mixers; Thin film circuits.; Quasiparticle mixers;

    Abstract : This licentiate is focused on the design and development of Superconductor-Insulator-Superconductor (SIS) junction mixer for ALMA Band 5, one of the ten frequency bands of the Atacama Large Millimeter Array (ALMA) project. ALMA Band 5 is a dual polarisation sideband separation heterodyne receiver covering radio frequencies (RF) from 163 GHz to 211 GHz, with 4-8 GHz intermediate frequency (IF). READ MORE

  2. 2. Mixer, Multiplier and Passive Components for Low Noise THz Receivers

    Author : Bhushan Billade; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; millimeter wave receivers; Superconductor-Insulator-Superconductor SIS mixers; thin-film circuits.; superconducting devices; quasi-particle mixers; frequency multiplier;

    Abstract : This thesis presents the work done in the field of development of low noise instruments for radio astronomy applications, and addresses some of the key components in the receiver. Part of this thesis describes the design and development of a Superconductor-Insulator-Superconductor (SIS) junction mixer covering RF frequencies from 163 to 211 GHz, reaching the quantum limited noise performance. READ MORE

  3. 3. Characterisation of the Specific Capacitance of Superconducting Tunnel Junctions

    Author : Parisa Yadranjee Aghdam; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Superconductor-Insulator-Superconductor tunnel junctions; Microwave measurement; Capacitance; Calibration;

    Abstract : Superconductor-Insulator-Superconductor (SIS) tunnel junctions are widely used as the mixing component in mm and sub-mm receivers for radio astronomy and environmental science. SIS mixers offer superior noise performance close to the quantum limit for frequencies up to 1 THz. READ MORE

  4. 4. Thin Films and Component Technologies for Low-Noise Terahertz Electronics

    Author : Dimitar Milkov Dochev; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; THz electronics; SIS; tunnel junctions; Nb3Al; NbN; thin film; hot electron bolometer; microwave circuits; superconductor; epitaxial film;

    Abstract : This thesis deals with several distinct subjects such as thin film deposition, design, fabrication and characterization of components for low-noise THz electronics.High energy-gap superconducting materials are of specific importance for low-noise THz mixer applications. READ MORE

  5. 5. Growth and Characterization of Nb3Al Thin Films for Low-Noise Terahertz Electronics

    Author : Dimitar Milkov Dochev; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; tunnel junction; SIS; Nb3Al; hot electron bolometer; thin film; superconductor; epitaxial film; magnetron co-sputtering;

    Abstract : Demand on ultimately sensitive heterodyne receivers for, e.g., radio astronomy and environmental science instrumentation, has driven large research activities on novel materials and devices for extending the frequency range into the THz domain. READ MORE