Sökning: "Multiplier"
Visar resultat 6 - 10 av 107 avhandlingar innehållade ordet Multiplier.
6. Towards Ultimate Performance of THz Heterodyne Receivers: SIS Frequency Multiplier and Wideband Passive Components
Sammanfattning : This thesis focuses on the development of advanced components for the future wideband side band separating and / or multipixel receivers for radio-astronomy with ultimate sensitivity.In this thesis, a novel frequency multiplier based on distributed superconducting tunnel (SIS) junctions has been demonstrated for the first time, taking advantage of the extreme inherent nonlinearity of such device. LÄS MER
7. Mixer, Multiplier and Passive Components for Low Noise THz Receivers
Sammanfattning : 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. LÄS MER
8. Reliable and Efficient Microwave Circuits for Space Applications
Sammanfattning : In this thesis, reliable and efficient microwave circuits used in space applications, e.g. satellite transponder systems, are discussed. The main focus is on mixers, multipliers and power amplifiers. LÄS MER
9. Low phase noise voltage controlled micro- and millimeter wave oscillators
Sammanfattning : .... LÄS MER
10. On the ICT Economy in the European Countries: Investigating the Contribution of the ICT Sectors Using the Input – Output Model
Sammanfattning : Previous studies have been devoted to investigating the future of economic growth and examining the importance of technology and the ICT sectors in accelerating the growth of the economy. These studies are from a macro perspective that emphasizes the role of infrastructure investment, as well as from the firm level analysis, which is mainly related to cost efficiency. LÄS MER