Sökning: "sub-mm wave"
Visar resultat 1 - 5 av 8 avhandlingar innehållade orden sub-mm wave.
1. MgB2 hot-electron bolometer mixers for sub-mm wave astronomy
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
2. Satellite microwave measurements of cloud ice properties
Sammanfattning : Upper tropospheric cloud ice and water vapour are two intimately connected components of the atmosphere, that influence the Earth's energy budget. The response of these components to a warming climate is not well understood. LÄS MER
3. Lumped arrays of Josephson junction oscillators
Sammanfattning : .... LÄS MER
4. Advanced Analog MMICs for mm-wave Communication and Remote Sensing in 0.15µm mHEMT Technology
Sammanfattning : Multi-Gigabit per second wireless communication and atmospheric remote sensing for weather forecasts are new applications in the mm-wave frequency spectra. The High Electron Mobility Transistor is an excellent technology for high frequency mm-wave applications. Its low noise and linear performance makes a 0. LÄS MER
5. Studies of planetary waves in ozone and temperature fields as observed by the Odin satellite in 2002-2007
Sammanfattning : The results presented in this PhD thesis are mainly based on measurements collected by the advanced sub-mm radiometer (SMR) aboard the Odin satellite in 2002-2007. The primary data are series of temperature and ozone profiles in the middle atmosphere up to 68 km. LÄS MER