Knowledge Centre
Find a document written by the best international scientists in our secure database.
24776 documents found.
Solid state power amplifier using impedance-transforming branch-line couplers for L-band satellite systems
Solid state power amplifier using impedancetransforming branch-line couplers for L-band satellite systems J. Bhari** I.D. Robertson *, R. Herath*, M. Gillick*, and *Communications Research Group Dept. of Electronicand ElectricalEngineering King'sCollege London, Strand, London, UK, WC2R 2LS Tel. +44 10)71873 2523 Fax +44 (0)71836 4781 * * Matra Marconi Space Colonial Way, Watford Herts, UK Abstract
GaAs-modules for power generation at W-band frequencies
GaAs-modules frequencies M. Tschernitz, J. Freyer for power generation at W-band lehrstuhl fur Allgemeine Elektrotechnik und Angewandte Elektronik, Arcisstr. 21, D-8000 Munchen 2, Germany. TEL.. 08921052956, FAX. 089-21052950. Abstract A novel technique for the encapsulation of GaAs transit-time devices is applied for power generation at W-band frequencies. The fabrication process leads to exc
PAMELA - Linearized solid state power amplifier at Ku-band frequency
PAMELA - Linearized solid state power amplifier at Ku-band frequency R. Kohl G. Eggers Deutsche Aerospace AG, Space Transportation and Propulsion Systems D-81663 Munchen, Germany Telephone: +49 89607 27417 Telefax: +498960727206 Abstract A Linearized Solid State Power Amplifier (SSPA) applying the PAMELAprinciple [1] has been designed and realized at Ku-Band frequencies. PAMELA stands for P
Adaptive compensation for microwave linearizer
Adaptive compensation for microwave linearizer c. Buoli - L.A. Cervi - A. Abbiati SIEMENS Telecomunicazioni S.pA 20060 Cassinode' Pecchi(MI) - Italy Abstract This paper presents a new adaptive microwave linearizer compensation system against temperature drifts and operating frequency variations (1). The main principle rests on the fact that for a QAM modulated RF carrier the signal envelope ex
A 2 watts Ku-band class AB MMIC amplifier
A 2 watts Ku-band class AB MMIC amplifier M. Sou lard * * * ., D. Roques .. 31 Toulouse Aleatel Espaee, LEtvVv\IC, rue Noel Pons, 92 Nanterre 5 Aleatel Espaee, 26 avenue j. F. Champollion, Abstract The aim of this paper is to present the design and measurements of a Ku-band class AB power amplifier. This two stage amplifier, designed by ALCATEL and manufactured by THOMSONfoundry service with HP
Open-ended microstrip lines coupled through an arbitrary aperture in a thick common ground plane
Open-ended microstrip lines coupled through an arbitrary aperture in a thick common ground plane Allen M. Trant. and Tatsuo Itoht tDepartment of Electrical Engineering, University of California, LosAngeles, California 90024, USA * Aerospace and Defense Sector, Hughes Aircraft Company EI Segundo, CA 90245, USA Abstract The spectral domain analysis (SDA)is extended to characterize open-ended micros
On the correct expansion of leaky modes of planar transmission lines in surface-wave waveguide modes
On the correct expansion of leaky modes of planar transmission lines in surface-wave waveguide modes R. Marques, F. Mesa, M. Horno Microwave Group. Department of Electronicsand Electromagnetism, UniversityOf Seville, Avda. Reina Mercedes sin. 410 12 Seville. (Spain). Fax 34-5-4239434; Tphne.: 34-5-4616615 Abstract The proper expansion of the leaky modes of planar transmission lines in the surface
Spectral domain analysis of planar circuits with rectangular and triangular elements and its application to the calculation of triangular patch antennas
Spectral domain analysis of planar circuits with rectangular and triangular elements and its application to the calculation of triangular patch antennas Thomas F. Eibert and Volkert HansenUniversitatsstrabe 150, 4630 Bochum * InsTitut fur Hochfrequenztechnik, Ruhruniversitat Bochum, Germany. Tel.. +492347003973; Fax +442347094167; Thomas.Eibert@ruba.rz.ruhr-uni-bochum.dbp.de e-mail Abstract We
An efficient solution of patch resonators by a combined 2-D/3-D method
An eHicient solution of patch resonators combined 2-D/3-D method A.A. Omar*, Y.L. Chow* and M.G. Stubbs" Waterloo, Waterloo, Ontario, Canada, N2L3G 1. Currentlythe first author is at the address below. * Department of Electrical & Computer Engineering, University of by a Research Centre, 3701 Carling Ave, P.O.Box * * Communications 11490, 5tn. H, Ottawa, Canada, K2H 852 Abstract This paper combi
Analysis of transversely coupled dielectric resonators using the mode matching method
Analysis of transversely coupled dielectric resonators using the mode matching method Adam Abramowicz: Warsaw Universityof Technology, Instituteof Electronics Fundamentals, Nowowiejska 15/19, 00-665 Warsaw, Poland, Tel.+4822-21007876, Fox +4822-252300, e-mailaabr@ipe.pw.edu.pl Abstract The resonant frequencies of a cylindrical dielectric resonator placed inside a rectangular waveguide are computed