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An Envelope Tracking System Using a GaAs Class-AB Power Amplifier and a Class-AD Modulator
An Envelope Tracking System Using a GaAs Class-AB Power Amplifier and a Class-AD Modulator A. Bräckle, S. Egorenkov, M. Ott, F. Siegert, S. Heck and M. Berroth Institute of Electrical and Optical Communications Engineering University of Stuttgart, 70569 Stuttgart, Germany Email: alexander.braeckle@int.uni-stuttgart.de Abstract--In this paper an envelope tracking system with a maximum output power
A High-Gain X-Band GaN-MMIC Power Amplifier
A High-Gain X-Band GaN-MMIC Power Amplifier Erhan Ersoy, Chafik Meliani, Serguei Chevtchenko, Paul Kurpas, Mathias Matalla, and Wolfgang Heinrich Ferdinand-Braun-Institut (FBH), Leibniz-Institut für Höchstfrequenztechnik, Berlin, Germany, Email: Ersoy@fbh-berlin.de Abstract-- In this paper, a high-gain X-band MMIC power amplifier is presented. The amplifier is based on 0.25µm-gate GaN HEMTs and re
Inductive Data Link for Biomedical Implants in the MICS Band
Inductive Data Link for Biomedical Implants in the MICS Band Tim Schellenberg, Guang Xu, Martin Schneider RF & Microwave Engineering Laboratory, University of Bremen Otto-Hahn-Allee 1, 28359 Bremen, Germany Tim.Schellenberg@hf.uni-bremen.de Abstract--We are reporting a short-range inductive data link for biomedical implants in the MICS band (402 -405 MHz). This system consists of a coil and a matc
Efficiency of Pulse and FMCW Radar under Condition of the Sea Clutter Impact
Efficiency of Pulse and FMCW Radar under Condition of the Sea Clutter Impact 1 Grygoriy Khlopov, 2Reinhard Knoechel, 2Wilhelm Stellmach, and 2Alexander Teplyuk 1 Institute of RadioPhysics and Electronics of NASU, Kharkov, 61085, Ukraine 2 University of Kiel, Kiel, 24143, Germany scattered signals are closer to noise-like character [7], which permits to realize more effective clutter rejection.
A Low Voltage 24 GHz VCO in 130nm CMOS For Localisation Purposes in Sensor Networks
A Low Voltage 24 GHz VCO in 130nm CMOS For Localisation Purposes in Sensor Networks Maruf Hossain, Alexander Kravets, Udo Pursche, Chafik Meliani, Wolfgang Heinrich Ferdinand-Braun-Institut (FBH), Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin / Germany Email: maruf.hossain@fbh-berlin.de Abstract -- A low-voltage CMOS cross-coupled voltage controlled oscillator (VCO) in 130nm IBM-CMOS pr
Coaxial Capacitor Loop Resonator for Wireless Power Transfer Systems
Coaxial Capacitor Loop Resonator for Wireless Power Transfer Systems Marco Dionigi and Mauro Mongiardo DIEI, University of Perugia, via G. Duranti 92 06125 Perugia, ITALY Abstract--We present a novel resonator, based on a coaxial capacitor, suitable for resonant magnetic-coupled Wireless Power Transfer (WPT) applications. Its advantages are compactness, ease of manufacture and low cost. In our str
Experimental phantom trials for UWB breast cancer detection
Experimental phantom trials for UWB breast cancer detection Marko Helbig1, Ingrid Hilger2, Martin Kmec1, Gabriella Rimkus2, Jürgen Sachs1 1 Institute for Information Technology, Ilmenau University of Technology, 98684 Ilmenau, Germany 2 Institute of Diagnostic and Interventional Radiology, Jena University Hospital Friedrich Schiller University Jena, 07747 Jena, Germany II. MEASUREMENT SETUP A.
Performance Comparison of Differential K-band VCOs in 130 nm CMOS Technology
Performance Comparison of Differential K-band VCOs in 130 nm CMOS Technology Mohammed K. Ali, Viswanathan Subramanian, Tao Zhang, and Georg Boeck Microwave Engineering Lab., Berlin Institute of Technology, Einsteinufer 25, Berlin, Germany Email: mka@mwt.ee.tu-berlin.de Abstract--This paper compares a conventional NMOS VCO with a transformer feedback (TF) VCO in 130 nm CMOS technology. A design pro
A Comparison of Power Amplifiers in Two Generations of SiGe:C Technologies
A Comparison of Power Amplifiers in Two Generations of SiGe:C Technologies Abouzar Hamidipour , Martin Jahn , Thomas F. Meister , Klaus Aufinger , and Andreas Stelzer Institute for Communications Engineering and RF-Systems, University of Linz, A-4040 Linz, Austria Infineon Technologies, Am Campeon 1-12, 85579 Neubiberg, Germany TABLE I T ECHNOLOGY DESCRIPTIONS OF THE TWO P ROCESSES Technology f
Frequency Invariant Far-Field Beam Pattern of UWB Printed Circular Monopole Antenna Array
Frequency Invariant Far-Field Beam Pattern of UWB Printed Circular Monopole Antenna Array Zainul Ihsan, Klaus Solbach University Duisburg-Essen, Hochfrequenztechnik, Duisburg, D-47057, Germany is a rectangular array of monopole antennas with integrated attenuators as the weighting factors applied to each element working across the 1.9-2.5 GHz frequency range [5]. Another example is a circular arra