Keynote presentation : SAR systems

Autor: Halsema, D. van, Otten, M.P.G., Maas, A.P.M., Bolt, R.J., Anitori, L.

Publikováno v: 2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2011, 7-9 November 2011, Tel Aviv, Israel

Synthetic Aperture Radar (SAR) systems are becoming increasingly important sensors in as well the military environment as in the civilian market. In this keynote presentation an overview will be given over more than 2 decades of SAR system∼ and SAR

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::e128479c423ffdcbe995c14a1c1a4462
http://resolver.tudelft.nl/uuid:7e38418e-3ea1-4c9d-a7ea-6e5a8ed4ff8c

3D mapping of buildings with SAPPHIRE

Autor: Smits, F.M.A., Wit, J.J.M. de, Rossum, W.L. van, Maas, A.P.M., Bolt, R.J., Lievers, C.M.

Publikováno v: Proceedings 6th Electro-Magnetic Remote Sensing-Defence Technology Centre (EMRS DTC)Technical Conference, 7-8 July 2009, Edinburgh, U.K.

An experimental radar system is described that is designed to determine a building map in three dimensions by driving past the building with the radar mounted on a vehicle. The radar system, SAPPHIRE, produces full polarimetric reflectivity data in t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::80b7b9481e9f6f2349ecee43ca57db67
http://resolver.tudelft.nl/uuid:5c9c0d72-084a-47d7-8e27-0d48dcc95b4a

Threats and protection for electronically-steered array radars

Autor: Janssen, J.P.B., Monni, S., Maas, A.P.M., Vliet, F.E. van

Publikováno v: 4th European Survivability Workshop (ESW-2008), 15-17th April 2008, QinetiQ Malvern Technology Centre, UK.

Front-end power overload protection is a vital issue in any electro-magnetic sensor. The issues around active electronically-steered arrays are more recent and pose new threats. Different categories of threats can damage the sensitive electronics in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::89e7d4a64e40a4b462f016482ea4416e
http://resolver.tudelft.nl/uuid:e92b3e2c-49ae-40f9-9161-5e40c1264470

60 GHz GaAs MMIC mixers with integrated LO buffer

Autor: Maas, A.P.M., Hoogland, J.A.

Publikováno v: Maas, A.P.M. ; Hoogland, J.A. (2005) 60 GHz GaAs MMIC mixers with integrated LO buffer. In: Gallium Arsenide applications symposium. GAAS 2005, 3-7 ottobre 2005, Parigi.

Using the 0.15 µm GaAs mHEMT process from WIN semiconductors, two 60 GHz down-conversion mixers have been designed, processed and measured. Both designs include a LO buffer amplifier to allow for a reduced external LO power level. With an LO power o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54e842eb105c305b6ad256c040ce4262
http://amsacta.unibo.it/1293/

L-Band MMICs for Space-based SAR system

Autor: Van Der Graaf, M.W., Van Wanum, M., Maas, A.P.M., Suijker, E.M., Knight, A., Ludwig, M.

Publikováno v: van der Graaf, M.W. ; van Wanum, M. ; Maas, A.P.M. ; Suijker, E.M. ; Knight, A. ; Ludwig, M. (2003) L-Band MMICs for Space-based SAR system. In: Gallium Arsenide applications symposium. GAAS 2003, 6-10 October 2003, Munich.

The design and performance of an L-Band GaAs chip-set is presented.The chip-set consists of a 6-bit attenuator circuit,a Low-Noise Amplifier (LNA)and a Multi Function Chip that is the combination of a 6-bit attenuator and 6-bit Phase shifter circuit.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d4032e2299e8752900dd047630d152b
http://amsacta.unibo.it/552/