Advanced search

Found 5 essays matching the above criteria.

1. 1. Optimisation of line of sight matching to obtain wind vectors from the SIW satellite

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Theresia Hestad; [2021]
   Keywords : Remote sensing; Wind measurements; Middle atmosphere; Retrieval; Scan bias; Satellite;

   Abstract : SIW, Stratospheric Inferred Winds, is one of the upcoming Swedish research satellites, aiming to study the winds in the middle atmosphere by measuring the Doppler shifts in molecules such as O3 with a limb viewing sub-mm spectrometer. By conducting simulations on the expected observations, the pointing sensitivity requirement of the satellite was investigated to be able to optimise the matching of the wind vectors. READ MORE

3. 2. Capacitance Optimization and Ballistic Modeling of Nanowire Transistors

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Azal Alothmani; [2018]
   Keywords : Nanowire transistor; 1-D MOSFET; RF performance; permittivity; parasitic capacitance; HSQ; COMSOL Multiphysics; Technology and Engineering;

   Abstract : Downscaling of Si-based metal-oxide-semiconductor field-effect transistors (MOSFETs) has contributed to increased microchip device density and to improve the functionality of the electronic circuits. The dimensions of state of art MOSFET is down to a few nanometers. It has been demonstrated that smaller MOSFETs are faster and more energy-efficient. READ MORE

4. 3. Studies of an Electrically Conducting Organic Material: Tetrathiafulvalene-7,7,8,8-Tetracyanoquinodimethane

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Author : Frida Lindberg; [2014]
   Keywords : TTF-TCNQ; Tetrathiafulvalene-7; 7; 8; 8-Tetracyanoquinodimethane; CVD; PVD; charge carrier transport; terahertz measurements; Hall characterization; Technology and Engineering;

   Abstract : This thesis aims to investigate the electrical properties of the organic charge transfer complex Tetrathiafulvalene-7,7,8,8-Tetracyanoquinodimethane, TTF-TCNQ. This is done through two different experimental techniques: Hall characterization and terahertz measurements. READ MORE

5. 4. Planar Antennas for Terahertz Detectors

   University essay from Avdelningen för elektronik, matematik och naturvetenskap

   Author : Zakir Hossain; [2012]
   Keywords : ;

   Abstract : The use of the millimeter-wave and terahertz (THz) systems are becoming very important in various scientific and military applications. In many applications i.e. radio-astronomy, THz imaging, remote sensing, secure communication links, THz radars, plasma diagnostics etc. READ MORE

6. 5. Analysis and optimasation of quantum cascade structures

   University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Matematisk fysik

   Author : Martin Lindskog; [2012]
   Keywords : quantum cascade laser; QCL; quantum cascade detector; QCD; laser; Green s function theory; non-equilibrium; terahertz; solid state physics; optical gain; semiconductor; heterostructure; Physics and Astronomy;

   Abstract : The quantum cascade laser (QCL) is a semiconductor heterostruc- ture using inter sub-band transitions to generate stimulated emission. The quantum cascade detector (QCD) is a similar to the QCL, but the heterostructure is tailored to absorb radiation and give a read-out current. READ MORE