“Millimeter-wave to Submillimeter-wave MMICs and Systems for Sensing and Communication”


The Advanced Circuit Research Center (ACRC) ) is inviting you to a free online seminar on Millimeter-wave to Submillimeter-wave MMICs and Systems for Sensing and Communication” given by Dr. Sebastien Chartier, Fraunhofer Institute for applied solid-state physics (IAF) Freiburg, Germany.

The transmission of electromagnetic waves in the atmosphere features local maxima in many frequency bands between 94 GHz and 850 GHz, making them especially attractive for millimeter-wave high-speed data links and long-distance high-resolution radar and imaging systems. High operating frequencies allow for precise geometrical resolution due to high absolute bandwidth and small wavelength and reduce the size of components and antennas as well, predestining them for lightweight spaceborne and airborne systems. In comparison to visible and infrared radiation, a particular benefit of millimeter-waves for imaging and sensing applications is the penetration of dust, fog, rain, snow, and textiles.

This talk covers a broad variety of MMICs and modules developed at the Fraunhofer Institute for Applied Solid State Physics (IAF) targeting applications for frequencies up to 600 GHz and above, using in-house advanced InGaAs/InAlAs metamorphic high electron mobility transistor (mHEMT) technologies. To achieve very high MMIC operating frequencies, the maximum frequency of oscillation (fmax) of the transistors was boosted to over 1000 GHz by increasing the indium content in the transistor channel and reducing the gate length down to 20 nm. The presented MMICs are essential components in wireless communication systems (including “Beyond 5G” mobile communication), sensor systems, as well as cryogenic MMICs for radio astronomy receivers and future quantum computing hardware. Additionally to single ultra-low-noise amplifiers, mixers, frequency multipliers, Tx/Rx and TRx circuits, different approaches for module packaging and system realization will also be covered.

Sébastien Chartier received the Master’s degree in microwave engineering from the University of Lille, Lille, France, in 2003 and the Dr.-Ing. Degree from the University of Ulm, Ulm, Germany, in 2009. In 2004, he joined the Institute of Electron Devices and Circuits, University of Ulm, as a member of the scientific staff, working on the design, assembly and testing of millimeter-wave SiGe BiCMOS MMICs, especially for application in automotive radar systems. In 2007, he joined the Fraunhofer Institute for applied solid-state physics (IAF) in Freiburg, Germany, working on microwave and millimeter-wave MMIC design based on advanced metamorphic HEMT technologies for radar, communication, medical and radio astronomy applications. From 2009 to 2017, he worked at Airbus Defence and Space GmbH in Ulm, Germany (now Hensoldt GmbH) as an R&D engineer working on SiGe BiCMOS based circuit design for next generation T/R modules for phased-array radar and communication systems. He was appointed specialist for RF system-on-chip in 2011 and Expert for system-on-chip in 2013. In 2017, he joined NXP Semiconductors Germany GmbH, Hamburg, Germany, as a subsystem design leader working on Si-based radar chips for next generation advanced driver assistance systems (ADAS). In 2019, he joined the Institute of Robust Power Semiconductor Systems (ILH), University of Stuttgart, Stuttgart, Germany as group leader for microwave and terahertz electronics. In 2020, he joined the Fraunhofer Institute for applied solid-state physics (IAF) in Freiburg, Germany as Head of the Business Unit “High Frequency Electronics”. Dr. Chartier has authored and co-authored more than 30 peer-reviewed papers and holds two patents. He was member of the technical program committee of the 2017 European Microwave Week and of the 2019 German Microwave Conference. He is an invited lecturer at the University of Stuttgart since 2020. He is member of IEEE, The Association of German Engineers (VDI), The Association for Electrical, Electronic and Information Technologies (VDE) and the European Microwave Association (EuMA).

Please sign up and join us on Wednesday,  May 20 at 10:30 IDT.

Link to the Zoom session will be provided after the registration.

Important: The participation is free of charge, but registration is required


“Quantum Computer on a CMOS Chip”


The Advanced Circuit Research Center (ACRC) ) is inviting you to a free online seminar on Quantum Computer on a CMOS Chipgiven by Prof. Robert Bogdan Staszewski, University College Dublin.

Quantum computing is a new paradigm that exploits fundamental principles of quantum mechanics, such as superposition and entanglement, to tackle problems in mathematics, chemistry and material science that are well beyond the reach of supercomputers. Despite the intensive worldwide race to build a useful quantum computer, it is projected to take decades before reaching the state of useful quantum supremacy. The main challenge is that qubits operate at the atomic level, thus are extremely fragile, and difficult to control and read out. The current state-of-art implements a few dozen magnetic-spin based qubits in a highly specialized technology and cools them down to a few tens of millikelvin. The high cost of cryogenic cooling prevents its widespread use. A companion classical electronic controller, needed to control and read out the qubits, is mostly realized with room-temperature laboratory instrumentation. This makes it bulky and nearly impossible to scale up to the thousands or millions of qubits needed for practical quantum algorithms. We propose a new quantum computer paradigm that exploits the wonderful scaling achievements of mainstream integrated circuits (IC) technology which underpins personal computers and mobile phones. Just like with a small IC chip, where a single nanometer-sized CMOS transistor can be reliably replicated millions of times to build a digital processor, we propose a new structure of a qubit realized as a CMOS-compatible charge-based quantum dot that can be reliably replicated thousands of times to construct a quantum processor. Combined with an on-chip CMOS controller, it will realize a useful quantum computer which can operate at a much higher temperature of 4 kelvin. Preliminary experimental result appears to validate the proposed ideas.

R. Bogdan Staszewski received B.S. (summa cum laude), M.S. and PhD from University of Texas at Dallas, USA, in 1991, 1992 and 2002, respectively. From 1991 to 1995 he was with Alcatel in Richardson, Texas. He joined Texas Instruments in Dallas, Texas in 1995. In 1999 he co-started a Digital RF Processor (DRP) group in TI with a mission to invent new digitally intensive approaches to traditional RF functions. Dr. Staszewski served as a CTO of the DRP group between 2007 and 2009. In July 2009 he joined Delft University of Technology in the Netherlands where he is currently a part-time Full Professor. Since Sept. 2014 he is a Full Professor at University College Dublin (UCD) in Ireland. He has co-authored five books, eight book chapters, 110 journal and 200 conference publications, and holds 190 issued US patents. His research interests include nanoscale CMOS architectures and circuits for frequency synthesizers, transmitters and receivers, as well as quantum computers. He is a co-founder of a startup company Equal1 Labs aiming at building the first practical CMOS quantum computer. He is an IEEE Fellow and a recipient of IEEE Circuits and Systems Industrial Pioneer Award (http://ieee-cas.org/industrial-pioneer-award-recipients). He was the Chair of the Technical Program Committee (TPC) of the IEEE Dallas Circuits and Systems Workshop, from 2005 to 2008. He was a TPC Chair of IEEE European Solid-State Circuits Conference (ESSCIRC) in 2019 in Krakow, Poland.

Please sign up and join us on Thursday, May 14 at 16:00 IDT.

Link to the Zoom session will be provided after the registration.

Important: The participation is free of charge, but registration is required



“Tiny and Efficient – Power Management as a Key Function in Microelectronic Systems”



The ACRC (Advanced Circuit Research Center) in cooperation with the IEEE Solid State Circuits Society continues the series of “ACRC Semiconductor Webinars”  – insightful and enriching workshops held by international leaders and professionals of the semiconductors sector.

This time we are inviting you to a free online seminar on “Tiny and Efficient – Power Management as a Key Function in Microelectronic Systems” given by Prof. Dr.-Ing. Bernhard Wicht from Leibniz University Hannover.

Power management comprises integrated circuits for highly efficient power supplies and for controlling power switches. These have recently gained tremendous importance in order to make electronic solutions for global growth areas such as renewable energies, autonomous driving and biomedical more compact, more energy-efficient and more reliable. Future applications in the field of machine learning and AI will only be possible with intelligent power management to supply complex processors and sensors. This talk gives an overview at system and circuit level of current and future challenges, along with examples including the topics of automotive, wearables, GaN, and current measurement.

Please sign up and join us on Thursday, 7 May 2020 at 15:00 IDT. A link to the Zoom session will be provided after registration.

Important: The participation is free of charge, but registration is required  https://forms.gle/7gFMht9eihJyVrcJA