Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
Soot particle properties in the microwave range
Soot particle properties in the microwave range R.P. Michel, R Saican., Universitat Mainz, i'vV'\INZ, FRG E. Schubert. 7, W-55 1 28 Institut fur Physik, Staudingerweg * Adam Opel AG, TEZ-VE 8017, W65423 RUSSELSHEIM;FRG Abstract This paper outlines the study of Diesel soot particle properties in the frequency band 2.0-40.0 GHz. Using a transmission/reflection as well as a cavity perturbation
Development of a radiocommunications prediction tool based on a physical modelling approach
Development of a radiocommunications prediction tool based on a physical modelling approach F.P. Fonmn, J.L. Albo, F. Isasi ETSIngenieros de Telecomunicaci6n. Universidad de Vigo. Campus Universitariode As Lagoas/Marcosende, 36200 Vigo (Spain) Tel 34-86-812137 Fax 34-86-812116 Abstract A 3D physical modelling approach to path loss prediction is addressed. GTD type models do not seem to produce a
Ultra low noise cooled S-band amplifier
Ultra low noise cooled S-band amplifier Alejandro Becerra., Manuel Sierra., Juan Daniel Gallego" * UniversidadPolitecnicade Madrid E.T.S.I.Telecomunicacion Ciudad universitaria.28040 Madrid. SpainTEL.341-3367360 FAX341-5432002 Yebes,(Guadalajara).Spain. TEL.3411-290311 290063 * * Instituto Geogr6fico Nacional. Centro Astronomico de Yebes FAX 3411- Abstract The design, fabrication and measurement
Low noise submillimetre SIS receiver for 30 m IRAM radiotelescope
Low nose submillimetre radiotelescope A. Karpov, M. Voss, J. Blondel, M. Carter, B. LazareH, K.H. Gundlach 515 receiver for 30 m IRAM Institut de Radioasronomie Millimwtrique, 300, ruede la Piscine, DomaineUniversitaire Grenoble, St Martin d'Here, F-38406 de France Abstract A low noise SIS mixer receiver is prepared in IRAM for the operation at 0.8 mm wavelength on the 30 M telescope at Pico Ve
Low noise log-periodic SIS open structure receiver at 180 and 305 GHz
Low noise log-periodic 180 and 305 GHz Jose A. Lopez Fernandez*, T.LehnertU, F. Mattiocco** 515 open structure receiver at * Centro Astronomico YebesApartadode Correos 148, de 19080 Guadalajara, Spain TEL +34 11 2903] 1; FAX:+34 11 290063, e-mail Lopez@cay.es * * IRAM(lnstitutde Radioastronomie Millimetrique)300, Ruede la Piscine, 38406 Saint Martin d'Heres, France TEL:+33 76 824900; FAX:+33 765
Dielectric resonator based synchronizer for multigigabit optical communications
Dielectric resonator based synchronizer multigigabit optical communications J. N. Matos, A. Gameiro, P. Monteiro, J.F.da Rocha Deport. Electronica Telecomunica~6es 3800 Aveiro PORTUGAL - Universidade de Aveiro for Telephone +351.34.25085 Fax +351.34381128 Abstract This paper deals with clock recovery circuits for multigigabit communications. For these bit rates simplicity is a key parameter. M
In orbit phase shift measurement on a satellite transponder
In orbit phase shift measurement transponder Michel Belfort, Michel Guieysse and Alain Lermoyer FRANCE TELECOM' CNET Paris B 38-40, rue du General leclerc, 92131 Issy-Ies-Moulineaux, FRANCE Tel: (33) 1 45 295565 Fax (33) 1 45 29 45 34 on a satellite . Abstract Due both to frequency down conversion on board geostationary communication satellites and Doppler effect, phase shift versus input drive
A fast automatic gain control for a RF amplifier used in a DCS1800 (PCN) base station transmitter
A fast automatic gain control for a RF amplifier used in a DCS1800 (PCN) base station transmitter x. Le Polozec, C. Trinh-Van, S. MuHat-Joly Societe Anonyme des Telecommunications Division Telecommunications 1 rueWatt, BP370 75626 Pariscedex 13, 1 France. Abstract After a brief review of the main characteristics required by a DCS1800 (PCN) transmitter, the paper presents the design of a fast feed
Electromagnetic energy coupled to a monopole inside a perfectly conducting rectangular cavity
Electromagnetic energy coupled to a monopole a perfectly conducting rectangular cavity o. Drisse* D. Lecointe*, w. Tabbara* ,+, J.L. LasserreU, *Division Onde - L.S.S./Service d'eleclromagnetisme, +Universite Paris VI Ecole Superieure.d'Electricite, Plateau de Moulon, 91190 Gif sur Yvette, France Tel: +33-(1) 69.41.80.40; Fax: +33-( 1) 69.41.30.60 Glomal, France ** inside Centre d'Etudes de Gram
Fundamental mode propagation in GTEM cell and scattering by conducting cubes
Fundamental mode propagation scattering by conducting cubes T. Rozzi, R. De Leo, L. Pierantoni, L. Zappelli. in GTEMcell and Dipartimentodi Elettronicaed Automatico - Universitodi Ancona Via Breece Bianche - 601 31 ANCONA - ITALY Abstract The GTEM cell is proving a useful tool for characterizing the electromagnetic scattering of objects under laboratory conditions. In this contribution, we pres