PHYSICS OF FUTURE ULTRA HIGH SPEED TRANSISTORS NEW CONCEPTS E. Kasper, G. Reitemann, Institut fUr Halbleitertechnik, UniversWit Stuttgart, Pfaffenwaldring 47, D-70569 Stuttgart, Germany E-mail: Post-iht.uni-stuttgart.de - PART II: Abstract - SiGe/Si - MODFETs have obtained encouraging results with maximum oscillation frequencies for p- and n-channel devices around 100 GHz. The SiGe/Si system is

PHYSICS OF FUTURE ULTRA HIGH SPEED TRANSISTORS - PART 1: HBT Erich Kasper, Jochen Eberhardt Institut fOr Halbleitertechnik, Universitat Stuttgart, Pfaffenwaldring 47, D-70569 Stuttgart, Germany Abstract - An overview about current status of SiGeHBT production is given. Advanced SiGe-HBTs are predicted to reach in near future fT=200GHz. Design examples are given. 

Antenna-Diversity Techniques in Cars for FM-Radio, TV and Cellular Phone L. Reiter, H. Lindenmeier, J. Hopf, R. Kronberger Institute for High Frequency Techniques University of the Bundeswehr Munich, D-85577 Neubiberg, Gennany Abstract - Car producers prefer multi antenna scanning diversity systems to improve FM and TV reception quality. These systems are highly efficient and cost effective to

Calculation Methods for Mobile Antenna Systems at Higher Frequencies Ulrich Jakobus Institut fUr Hochfrequenztechnik, Universitat Stuttgart eMail: jakobus-ihf.uni-stuttgart.de WWW: http://www.ihf.uni-stuttgart.de Abstract - This contribution addresses the efficient numerical analysis and optimisation of mobile antenna systems operating at higher frequencies, where the typical geometrical dimension

Antenna Technology for Millimeter Wave Automotive Sensors Klaus Solbach*, Robert Schneider** *University Duisburg, Microwave Department, eMail hft-uni-duisburg.de **DaimlerChrysler Research, Ulm, eMail robert.r.schneider-daimlerchrysler.com Abstract - Automotive sensors for the detection and discrimination of other vehicles on the road, obstacles, and boundaries use miniature radar systems and ar

Spiral Antenna with Planar External Feeding *E. Gschwendtner, J. Parlebas, W. Wiesbeck Institut fUr Hochstfrequenztechnik und Elektronik, University of Karlsruhe KaiserstraBe 12,76128 Karlsruhe, Gennany e-mail: Eberhard.Gschwendtner-etec.uni-karlsruhe.de Abstract - This contribution presents a twoarm archimedean spiral antenna with a simple planar external feeding structure. Therefore this an

Trends on Handset Antennas Dirk Heberling, Matthias Geissler IMST GmbH, Kamp-Lintfort, Germany EMail: heberling-imst.de WWW: http://www.imst.de Abstract - For a long time antennas for handsets were seen as a necessary piece of wire at the end of a high tech system. Due to a strong demand for better performance, lower price and better design the antenna element is getting more and more in the focus



UPGRADED GYROTRON SYSTEM FOR MILLIMETER-WAVE PROCESSING OF MATERIALS' Yurii Bykov, Gregory Denisciv, Anatolii Eremeev, Arkadii Gol'denberg, Vladislav Holoptsev, Aleksei Luchinin, Vladimir Semenov Institute of Applied Physics, Nizhny Novgorod, Russia GYCbM. Ltd., Nizhny Novgorod, Russia E-mail: byk-appl.sci-nnov.ro Abstract - Main components of the prototype 10 kW CW 30 GHz gyrotron system '-for mi

A MICROWAVE METHOD FOR THE STEP-LIKE RECONSTRUCTION OF LAYERED DIELECTRIC MEDIA Valeri MikhnevI, Pertti Vainikainen2 1 Institute of Applied Physics, Minsk, Belarus eMail: mikhnev-iaph.bas-net.by 2Helsinki University of Technology, IRC Radio Laboratory, Finland eMail: pva-radio.hut.fi Abstract An improved iterative approach to reconstruct inhomogeneous dielectric half-space using the reflection coe