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Towards a Design of the Ultra-Wideband Microwave Devices Using the Non-Foster Negative Reactances
Towards a Design of the Ultra-Wideband Microwave Devices Using the Non-Foster Negative Reactances Dmitry V. Kholodnyak and Viacheslav M. Turgaliev Microwave Microelectronics Laboratory, Department of Microelectronics & Radio Engineering, St. Petersburg Electrotechnical University "LETI", 5 Prof. Popov Str., 197376, St. Petersburg, Russia Abstract--A novel simple and efficient approach to a design
Differentially Driven Loop Antennas at 77 GHz
Differentially Driven Loop Antennas at 77 GHz Mahmoud Al Henawy, Natasha Aliya, Martin Schneider RF & Microwave Engineering Laboratory University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany Mahmoud.alhenawy@hf.uni-bremen.de Abstract--We developed low profile, differentially fed antennas that operate at 77 GHz. A rectangular and a circular loop antenna were designed and fabricated. The ant
Dynamic Range of a P-I-NDiodes based SP4T Switch-IC for broadband Ka-band Satellite Communication Applications
Dynamic Range of a P-I-NDiodes based SP4T Switch-IC for broadband Ka-band Satellite Communication Applications Johannes F. Trabert1 , Member, IEEE, Kurt Blau, Member, IEEE Institute for Information Technology & Institute for Micro- and Nanotechnologies Ilmenau University of Technology, P.O. Box 100565, D-98684 Ilmenau, Germany 1 Johannes.Trabert@TU-Ilmenau.de Abstract-- This paper focuses on th
Optimum Power Combining Configuration for High Power Amplifiers with Broadband Performance
Optimum Power Combining Configuration for High Power Amplifiers with Broadband Performance Sebastian Preis, Daniel Gruner, Khaled Bathich, Georg Boeck Microwave Engineering Laboratory, Berlin University of Technology Einsteinufer 25, 10587 Berlin, Germany Abstract--This contribution deals with different effects limiting the performance of broadband, high power amplifiers. The question whether a si
Miniaturized Surface Wave Cylindrical Metamaterial Loaded Resonator
Miniaturized Surface Wave Cylindrical Metamaterial Loaded Resonator Nasrin Nasr Esfahani, Klaus Schünemann Institut für Hochfrequenztechnik, Technische Universität Hamburg-Harburg, 21071, Hamburg, Germany Abstract-- In this paper, we present a novel miniaturized MNG (-negative) metamaterial loaded cylindrical cavity resonator based on the existence of surface waves at the interface between a metam
A Beam Switching Three Layer Reconfigurable Antenna
A Beam Switching Three Layer Reconfigurable Antenna Sahaya kulandai raj Joseph, Jan Fahlbusch and Joerg Schoebel Institute for High-Frequency Technology Braunschweig University of Technology Braunschweig 38106 Germany Abstract--This paper presents a three layer reconfigurable antenna which can switch its radiation pattern in different directions depending upon the state of the RF switches. The co
Software Optimization of a Supply Modulated GaNAmplifier for Baseband Access ET Systems
Software Optimization of a Supply Modulated GaNAmplifier for Baseband Access ET Systems Adam Raemer, Olof Bengtsson, and Wolfgang Heinrich Ferdinand-Braun-Institut (FBH), Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany Abstract--A simulation based design procedure for supply modulated amplifiers is presented. With the developed designguide optimum transistor operation under suppl
On-Orbit Verification of a 4×4 Switch Matrix for Space Applications based on the Low Temperature Co-fired Ceramics Technology
On-Orbit Verification of a 4 × 4 Switch Matrix for Space Applications based on the Low Temperature Co-fired Ceramics Technology Stefan Humbla, Saqib Kaleem, Jens M¨ ller, Sven Rentsch, Ralf Stephan, u Dirk St¨ pel, Johannes F. Trabert, Gabor Vogt, Matthias A. Hein o RF and Microwave Research Laboratory Ilmenau University of Technology, Ilmenau, 98684, Germany Abstract--We have developed a compact
Shadowing effect investigation for the purposes of person detection and tracking by UWB radars
Shadowing effect investigation for the purposes of person detection and tracking by UWB radars Daniel URDZÍK1, Rudolf ZETÍK2, Dusan KOCUR3, Jana ROVÁKOVÁ4 1,3,4 Technical University of Kosice, Kosice, Slovak Republic Ilmenau University of Technology, Ilmenau, Germany 2 1 Daniel.Urdzik@tuke.sk, 2Rudolf.Zetik@TU-Ilmenau.de, 3 Dusan.Kocur@tuke.sk,4Jana.Rovnakova@tuke.sk However, the problem of mul
On Parasitic Coupling in CPW Structures
On Parasitic Coupling in CPW Structures Gia Ngoc Phung, Ralf Doerner, Franz Josef Schmückle and Wolfgang Heinrich Ferdinand-Braun-Institut (FBH), Leibniz-Institut für Höchstfrequenztechnik, Berlin, Germany Abstract--Parasitic coupling mechanisms in CPW line systems are investigated. This is important for open and short reflect standards in calibration, for instance. Simulation results are presente