Search for dissertations about: "superconducting mixers"
Showing result 16 - 20 of 20 swedish dissertations containing the words superconducting mixers.
-
16. Thin Films and Component Technologies for Low-Noise Terahertz Electronics
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
-
17. Study of MgB2 and YBa2Cu3O7-x Microbolometers for THz Sensing Applications
Abstract : In this thesis, two novel THz detectors based on magnesium diboride (MgB2)and yttrium barium copper oxide (YBa2Cu3O7-x) are presented. In particular,MgB2 superconductor is used for the investigation of hot-electron bolometer(HEB) mixers, while YBa2Cu3O7-x is explored in microbolometers for room-temperaturecoherent and incoherent detection. READ MORE
-
18. Growth and Characterization of Nb3Al Thin Films for Low-Noise Terahertz Electronics
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
-
19. High-frequency phenomena in small Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
Abstract : In this thesis, the tunneling between individual atomic layers in structures of Bi2Sr2CaCu2O8+x based high-temperature superconductors are experimentally studied employing the intrinsic Josephson effect. A special attention is paid to the fabrication of small mesa structures using micro and nanofabrication techniques. READ MORE
-
20. Mm-wave Radio Astronomy Instrumentation for the Onsala Space Observatory and SEST
Abstract : The thesis presents work done in developing instrumentation for mm- and submm-wave radio astronomy. The work described is in several fields. The greater part of the thesis is concerned with sensitive heterodyne receivers and in particular the cryogenically cooled mixers. In paper A the SEST telescope and its observing system are described. READ MORE