Sökning: "sub-millimetre waves"

Hittade 3 avhandlingar innehållade orden sub-millimetre waves.

1. 1. HBV frequency multiplier 2D arrays and application

   Författare :Robin Dahlbäck; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; terahertz sources; 2D array frequency multipliers; Heterostructure Barrier Varactors HBVs ; THz; sub-millimetre waves; THz imaging; varactor frequency multipliers;

   Sammanfattning : The utilisation of the THz spectrum ( 0.3-3 THz ) is hampered by technological difficulties to generate power at these frequencies. LÄS MER

3. 2. Millimetre wave waveguide enclosed grid frequency multipliers and imaging

   Författare :Robin Dahlbäck; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter wave; THz imaging; THz sources; Grid; Heterostructure Barrier Var- actors HBVs ; Varactors; Array; FMCW; 2D-grid; Quasi-optical.; Frequency multipliers; Radars; sub-millimetre waves; Schottky diodes;

   Sammanfattning : The utilisation of the THz spectrum ( 0.3-10 THz ) is hampered by fundamental difficulties in generating power at these frequencies. LÄS MER

4. 3. Recovery and validation of Odin/SMR measurements of mesospheric CO and H2O

   Författare :Francesco Grieco; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; mesosphere; microwave limb sounding; H2O; recovery; CO;

   Sammanfattning : Although life on Earth is concentrated in the troposphere, not only the processes happening here are of interest, since tropospheric processes are not the only ones that have an impact on the climate. Coupling mechanisms between different layers are such that changes in middle atmospheric dynamics and composition have an effect on what happens at lower altitudes. LÄS MER