dc.contributor |
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions |
dc.contributor |
López Dekker, Francisco J. |
dc.contributor |
Rolain, Yves |
dc.contributor.author |
Gréant, Nicolas |
dc.date |
2009-07-29 |
dc.identifier.uri |
http://hdl.handle.net/2099.1/7343 |
dc.language.iso |
eng |
dc.publisher |
Universitat Politècnica de Catalunya |
dc.rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.rights |
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Radar |
dc.subject |
Synthetic aperture radar -- Design |
dc.subject |
Radar d'obertura sintètica -- Disseny |
dc.title |
Design and Realisation of a Synthetic Aperture Radar Transmitter |
dc.type |
info:eu-repo/semantics/bachelorThesis |
dc.description.abstract |
Projecte fet en col.laboració amb el centre Vrije Universiteit Brussel |
dc.description.abstract |
In this master degree project a Synthetic Aperture Radar (SAR) transmitter
is designed and realized. This transmitter will be used in the Signal Theory
and Communications lab of Universitat Politècnica de Catalunya as a test
transmitter because the actual transmitters, which are two satellites from the
European Space Agency, only provide a few seconds of testing every few weeks.
This is not su cient to continuously improve the sophisticated receiver subsystems.
It was mainly focussed on the design, layout and building of the analog
microwave subsystems but also some programming skills were necessary to generate
the required input signal.
By means of two synchronized direct digital synthesizers, two linearly frequency
sweeping signals (chirps) at low-frequency band (base band) are generated
and two mixers upconvert these signals to a high-frequency band around
a carrier at 5.3 GHz. The carriers are provided by a quadrature hybrid, which
splits the high-frequent sine wave from the local oscillator in an in-phase signal
and a signal 90 degrees shifted in phase to the latter one (quadrature signal).
Both outputs from the mixers are recombined by a power combiner, ltered and
ampli ed by a low-noise ampli er and a power ampli er to obtain the required
test signal.
The testing of the transmitter was a great success in which theory went hand
in hand with practice. The realization of this project will be one of the required
assets for further groundbreaking developments in the SAR research domain. |