@article{28128, author = {{Drossel, Kerstin and Eickelmann, Birgit and Pfuhl, Nadja}}, journal = {{SchulVerwaltung NRW}}, number = {{1}}, pages = {{28--31}}, title = {{{Lehrerkooperation – ein schwer zu erfassendes Konstrukt. Unterschiede im Kooperationsverhalten zwischen Fachlehrkräften}}}, volume = {{23}}, year = {{2012}}, } @inbook{28129, author = {{Eickelmann, Birgit and Anskeit, Nadine}}, booktitle = {{Unterrichtsqualität sichern – Sekundarstufe}}, editor = {{Bonsen, Martin and Homeier, Wulf and Tschekan, Kerstin and Ubben, Lotta}}, pages = {{1--23}}, publisher = {{Raabe}}, title = {{{Potenziale des Einsatzes von Wiki-Technologien als Beitrag zur Methodenvielfalt im Unterricht}}}, year = {{2012}}, } @inbook{28132, author = {{Eickelmann, Birgit}}, booktitle = {{Wahnsinn Bildung. Brauchen wir eine neue Lernkultur?}}, pages = {{134--155}}, publisher = {{F. A. Brockhaus/wissenmedia}}, title = {{{Lernen 2.0. Das Lernpotenzial der Neuen Medien}}}, year = {{2012}}, } @inbook{28133, author = {{Drossel, Kerstin and Wendt, Heike and Schmitz, Silvia and Eickelmann, Birgit}}, booktitle = {{TIMSS 2011. Mathematische und naturwissenschaftliche Kompetenzen von Grundschulkindern in Deutschland im internationalen Vergleich}}, editor = {{Bos, Wilfried and Wendt, Heike and Köller, Olaf and Selter, Christoph}}, pages = {{171--202}}, publisher = {{Waxmann}}, title = {{{Merkmale der Lehr- und Lernbedingungen im Primarbereich}}}, year = {{2012}}, } @inbook{28135, author = {{Drossel, Kerstin and Eickelmann, Birgit}}, booktitle = {{Organisation und Partizipation}}, editor = {{Weber, Susanne Maria and Göhlich, Michael and Schröer, Andreas and Macha, Hildegard and Fahrenwald, Claudia}}, pages = {{259--272}}, publisher = {{Springer VS Verlag}}, title = {{{Organisationale Bedingungen der Entwicklung von Ganztagsgymnasien: Wie die Schulleitung das Kooperationsverhalten von Lehrkräften fördern kann}}}, year = {{2012}}, } @inbook{28154, author = {{Matzner, Tobias}}, booktitle = {{Ethics-Society-Politics: Papers of the 35th International Wittgenstein Symposium}}, editor = {{Greif, Martin G. Weiss und Hajo}}, publisher = {{ALWS}}, title = {{{The interdependence of normalcy and exclusion – some political thoughts inspired by On Certainty}}}, year = {{2012}}, } @phdthesis{28213, author = {{Salfeld, Maike}}, isbn = {{978-3-942647-20-5}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Konzeption eines Regelungssystems zur gezielten Beeinflussung der Fahrdynamik in Unfallsituationen}}}, volume = {{301}}, year = {{2012}}, } @phdthesis{28214, author = {{Delius, R.}}, isbn = {{978-3-942647-22-9}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Sicherstellen der Abrufe bei Automotive-Zulieferern mit minimalen Kosten unter besonderer Berücksichtigung von Liquiditäts-, Beschäftigungs-, Knowhow- und IT-Restriktionen}}}, volume = {{303}}, year = {{2012}}, } @techreport{2828, author = {{Kundisch, Dennis and John, Thomas}}, pages = {{9--11}}, title = {{{Geschäftsmodelle als Thema der Wirtschaftsinformatik - Statements zum Themenfeld "Stand der Forschung"}}}, year = {{2012}}, } @inbook{28561, author = {{Gausemeier, J {\ "u} rgen and Iwanek, Peter and K {\" o} chling, Daniel}}, booktitle = {{Industrieanzeiger}}, pages = {{68--69}}, publisher = {{Konradin Verlag}}, title = {{{The production system of the future thinks and learns}}}, volume = {{30}}, year = {{2012}}, } @proceedings{28562, editor = {{Andrich, Burkhard and Kirschfink, Franz Josef and Sachs, Helge and Peitz, Christoph and R {\ "u} bbelke, René}}, title = {{{Market and competitive strategies for {\" u } r the MRO business {\ "a} ft of the civil aviation industry}}}, volume = {{306}}, year = {{2012}}, } @proceedings{28563, editor = {{Wall, Marina and Gausemeier, J {\ "u} rgen and Peitz, Christoph}}, publisher = {{publishing series of the Heinz Nixdorf Institute, Paderborn}}, title = {{{Technology push-oriented product planning}}}, volume = {{306}}, year = {{2012}}, } @proceedings{28564, editor = {{Gausemeier, J {\ "u} rgen}}, publisher = {{Publishing series of the Heinz Nixdorf Institute, Paderborn}}}, title = {{{Foresight and technology planning . 8th Symposium for {\" u} r foresight and technology planning }}}, volume = {{306}}, year = {{2012}}, } @inproceedings{28565, author = {{Anacker, Harald and Gausemeier, J{\"u}rgen and Dumitrescu, Roman and Dziwok, Stefan and Sch{\"a}fer, Wilhelm}}, booktitle = {{Proceedings of the 9th France-Japan / 7th Europe-Asia Congress 13th International Workshop on Research and Education in Mechatronics (MECATRONICS-REM 2012)}}, pages = {{101--108}}, title = {{{Solution Patterns of Software Engineering for the System Design of Advanced Mechatronic Systems}}}, year = {{2012}}, } @inproceedings{28566, author = {{Oesters{\"o}tebier, Felix and Dziwok, Stefan and Bauer, Frank and Tr{\"a}chtler, Ansgar and Sch{\"a}fer, Wilhelm and Gausemeier, J{\"u}rgen}}, publisher = {{Carl Hanser Verlag, M{\"u}nchen}}, title = {{{Unterst{\"u}tzung des mechatronischen Entwurfs durch die effektive Suche nach L{\"o}sungselementen mithilfe von semantischen Technologien}}}, year = {{2012}}, } @inproceedings{28567, author = {{Bauer, Frank and Gausemeier, J{\"u}rgen and K{\"o}chling, Daniel and Oesters{\"o}tebier, Felix}}, publisher = {{Carl Hanser Verlag, M{\"u}nchen}}, title = {{{Simulative Absicherung mechatronischer Systeme in der fr{\"u}hen Phase der Produktentstehung}}}, year = {{2012}}, } @article{28569, author = {{Brink, Volker and Gausemeier, J {\ "u} rgen and Reymann, Felix}}, journal = {{construction, issue 11/2012}}, title = {{{integrative development of product and technology strategies}}}, year = {{2012}}, } @inproceedings{28570, abstract = {{In this paper, a comprehensive framework for the computer-aided planning and optimisation of process chains for functional graded components is presented. The framework is divided into three modules – the component description, the expert system, and the modelling and process chain optimisation. The component description module enhances a standard CAD model by a voxel-based representation of the graded properties. It allows the target properties to be defined. The expert system proposes process chains capable of producing components according to the requirements of the enhanced CAD model. They usually consist of a sequence of heating, forming, and cooling processes. The dependencies between the applied manufacturing processes need to be considered. Therefore, the robustness of the property distributions achieved in a process step with respect to variations in the input properties is analysed in the third module, in which the process chains are optimised. A method to accomplish this task by performing a model-based sensitivity analysis and subsequent Monte-Carlo simulations of the important parameters is proposed in this paper. The applicability of the method is shown for a thermo-mechanically coupled compression moulding process. }}, author = {{Biermann, Dirk and Gausemeier, J{\"u}rgen and Heim, Hans-Peter and Hess, Stefan and Petersen, Marcus and Ries, Angela and Wagner, T}}, editor = {{Heim, Hans-Peter and Biermann, Dirk and Maier, Hans J{\"u}rgen}}, isbn = {{978-3-942267-58-8}}, pages = {{195--200}}, publisher = {{Verlag Wissenschaftliche Scripten}}, title = {{{Computer-Aided Planning and Optimisation of Manufacturing Processes for Functional Graded Components}}}, year = {{2012}}, } @article{28571, author = {{Gausemeier, J {\ "u} rgen and Grote, Anne-Christin}}, journal = {{CONTROLLING - magazine for { \ "u} r success-oriented corporate management}}, pages = {{516--522}}, title = {{{Strategic leadership with scenarios}}}, volume = {{24th year}}, year = {{2012}}, } @inproceedings{28572, author = {{Gausemeier, J{\"u}rgen and Tschirner, Christian and Va{\ss}holz, Mareen}}, title = {{{Systems Thinking: Sensitizing for Systems Engineering - Experiences from academic teaching and industry workshops}}}, year = {{2012}}, } @inproceedings{28573, author = {{Berssenbr{\"u}gge, Jan and Bonner, Erik}}, booktitle = {{Proceedings of the ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference}}, title = {{{GPU-based Local Tone Mapping in the Context of Virtual Night Driving}}}, year = {{2012}}, } @inproceedings{28574, author = {{Bensiek, Tobias and K{\"u}hn, Arno and Gausemeier, J{\"u}rgen and Grafe, Michael}}, booktitle = {{Proceedings of the ASME 2012 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, IDETC/CIE 2012, Chicago, IL, USA, August 12 – 15}}, title = {{{Self-Assessment for Evaluation and Improving the Product Development Processes in SMEs}}}, year = {{2012}}, } @inproceedings{28575, abstract = {{When designing complex mechatronic systems, a team of developers will be facing many challenges that can impede progress and innovation if not tackled properly. In meeting them simulation tools play a central role. Yet it is often impossible for a single developer to foresee the overall impact a design decision will have on the system and on the other domains involved. For this task multi-domain simulation tools exists, but because of its complexity and the different levels of detail that are needed, the effort to specify a complete system from scratch is very high. Another challenge is the selection of the most suitable solution elements provided by the manufacturers. Currently they are often chosen manually from catalogues. The development engineer is therefore usually inclined to employ well-known solution elements and suppliers. To tackle both challenges our aim is an increase in efficiency and innovation by means of generally available solution knowledge, such as well-proven solution patterns, ready-to-use solution elements, and established simulation models [1]. Our paper presents a tool-supported, sequential design process. From the outset, the comprehensive functional capability of the designed system is supervised by means of multi-domain simulation. At significant points in the design process, solution knowledge can be accessed as it is stored in ontologies and therefore available via Semantic Web [2]. Thus, one can overcome barriers resulting from different terminologies or referential systems and furthermore infer further knowledge from the stored knowledge. The paper focuses on an early testing in the conceptual design stage and on the subsequent semantic search for suitable solution elements. After the specification of a principle solution for the mechatronic system by combining solution patterns, an initial multi-domain model of the system is created. This is done on the basis of the active structure and of idealized simulation models which are part of a free library and associated with the chosen solution patterns via the ontologies. In further designing the controlled system and its parameters with the completed model, the developer defines additional criteria to be fed into the subsequent semantic search for solution elements. Information on the latter is provided by the manufacturers as well as detailed simulation models, which are used to analyze the functional capability of the concretized system. Therefore, the corresponding idealized models are replaced automatically with the parameterized models of the solution elements containing for example the specific friction model for the chosen motor. We show this process using the concrete example of a dough-production system. In particular, we focus on its transport system. Resulting requirements for the simulation models and their level of detail are expound, as well as the architecture and benefits of the ontologies. [1] Bauer, F., Anacker, H., Gaukstern, T., Gausemeier, J., Just, V., (2011), “Analyzing the dynamic behavior of mechatronic systems within the conceptual design”, Proceedings of the 18th International Conference on Engineering Design (ICED11), 4, Copenhagen, pp. 329-336. [2] Berners-Lee, T., Hendler, J.; Lassila, O., (2001), “The Semantic Web”, Scientific American, 284(5), pp. 34–43. }}, author = {{Oesters{\"o}tebier, Felix and Just, Viktor and Tr{\"a}chtler, Ansgar and Bauer, Frank and Dziwok, Stefan}}, booktitle = {{Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis}}, pages = {{647----656}}, publisher = {{ASME}}, title = {{{Model-Based Design of Mechatronic Systems by Means of Semantic Web Ontologies and Reusable Solution Element}}}, year = {{2012}}, } @inproceedings{28576, author = {{Dumitrescu, Roman and Anacker, Harald and Bauer, Frank and Gausemeier, J{\"u}rgen}}, booktitle = {{Proceedings of the ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis}}, publisher = {{ASME}}, title = {{{Computer support for the identification of solution patterns for the conceptual design of advanced mechatronic systems}}}, year = {{2012}}, } @inproceedings{28577, author = {{Kokoschka, Martin and Gausemeier, J{\"u}rgen and Lehner, Markus}}, booktitle = {{Proceedings of 18th International ICE-Conference on Engineering, Technology and Innovation }}, title = {{{Development of Product Piracy Robust Products and Production Systems}}}, year = {{2012}}, } @proceedings{28578, editor = {{Kokoschka, Martin and Gausemeier, J{\"u}rgen and Lehner, Markus}}, title = {{{Development of Product Piracy Robust Products and Production Systems}}}, year = {{2012}}, } @inproceedings{28579, author = {{Gausemeier, J{\"u}rgen and Lehner, Markus and Peitz, Christoph and Grote, Anne-Christin}}, publisher = {{International Society for Professional Innovation Management (ISPIM)}}, title = {{{Stakeholder based innovation management}}}, volume = {{17}}, year = {{2012}}, } @article{28580, author = {{Radkowski, Rafael and Wassmann, Helene}}, journal = {{IEEE International Conference on Intelligent Engineering Systems (INES) 2012}}, title = {{{Knowledge-based Zooming Technique for the Interactive Analysis of Mechatronic Systems}}}, year = {{2012}}, } @inproceedings{28581, author = {{Dumitrescu, Roman and Gaukstern, Tobias and J{\"u}rgenhake, Christoph and Gausemeier, J{\"u}rgen and K{\"u}hn, Arno}}, title = {{{Pattern-Based Integrative Design of Molded Interconnect Devices (MID)}}}, year = {{2012}}, } @inproceedings{28582, author = {{Bensiek, Tobias and K{\"u}hn, Arno and Gausemeier, J{\"u}rgen and Grafe, Michael}}, booktitle = {{Proceedings of the 12th International Design Conference}}, title = {{{Maturity Based Improvement of Product Development Processes in Small and Medium-Sized Enterprises}}}, year = {{2012}}, } @article{28583, author = {{Klemp, Eric and Wall, Marina}}, journal = {{Digital Engineering Magazin}}, title = {{{The production of tomorrow - additive manufacturing processes in industrial use}}}, volume = {{4/12}}, year = {{2012}}, } @book{28584, editor = {{Gausemeier, J {\ "u} rgen and Lanza, Gisela and Lindemann, Udo}}, publisher = {{Carl Hanser Verlag, M {\ "u} nchen}}, title = {{{Developing products and production systems integratively - modeling and analysis in the early days Phase of product creation}}}, year = {{2012}}, } @article{28585, author = {{Gausemeier, J{\"u}rgen and Echterhoff, Niklas and Kokoschka, Martin and Wall, Marina}}, journal = {{Fraunhofer Direct Digital Manufacturing Conference 2012}}, title = {{{Thinking ahead the Future of Additive Manufacturing – Scenario-based Matching of Technology Push and Market Pull}}}, year = {{2012}}, } @inproceedings{28586, author = {{Gausemeier, J{\"u}rgen and Lehner, Markus and Peitz, Christoph}}, publisher = {{IAMOT}}, title = {{{Stakeholder analysis in developing technology strategies}}}, volume = {{21}}, year = {{2012}}, } @inproceedings{28587, author = {{Teichrieb, Heinrich and Just, Viktor and Dziwok, Stefan and Pohlmann, Uwe and Schierbaum, Thomas and Tr {\ "a} chtler, Ansgar}}, title = {{{Model-based design of two cooperating Delta Robot}}}, year = {{2012}}, } @inproceedings{28692, author = {{Bloh, Thiemo}}, location = {{Bielefeld}}, title = {{{Kooperationsbedingte Identitäts- und Kompetenzentwicklung von Grundschullehrkräften}}}, year = {{2012}}, } @phdthesis{24036, author = {{Pottebaum, Jens}}, isbn = {{3-86991-525-0}}, keywords = {{Arbeitsorganisation, E-Learning, Lernorganisation, Lerntechnik, Wissensmanagement}}, publisher = {{Monsenstein und Vannerdat}}, title = {{{Optimierung des einsatzbezogenen Lernens durch Wissensidentifikation}}}, year = {{2012}}, } @inproceedings{24067, author = {{König-Ries, Birgitta and Pipek, Volkmar and Pottebaum, Jens and Strohschneider, Stefan}}, booktitle = {{Software Engineering 2012: Fachtagung des GI-Fachbereichs Softwaretechnik, 27. Februar - 2. März 2012 in Berlin}}, editor = {{Jähnichen, Stefan and Küpper, Axel and Albayrak, Sahin}}, isbn = {{978-3-88579-292-5}}, keywords = {{Ver{\}}, pages = {{196}}, publisher = {{GI}}, title = {{{IT-Unterstützung für Public Safety & Security: Interdisziplinäre Anforderungsanalyse, Architekturen und Gestaltungskonzepte (IT4PSS 2012) }}}, year = {{2012}}, } @inproceedings{24401, abstract = {{A subharmonic receiver for sensing applications in the 245 GHz ISM band has been proposed. The receiver consists of a single-ended common base LNA, a 60 GHz push-push VCO with 1/32 divider, a transconductance 4th subharmonic mixer and IF amplifier. The receiver is fabricated in fT/fmax=300/500 GHz SiGe: C BiCMOS technology. Its measured single-ended gain is 21 dB at 243 GHz with tuning range of 12 GHz, and the single- side band noise figure is 32 dB. The input 1-dB compression point is at -37 dBm. The receiver dissipates a power of 358 mW.}}, author = {{Mao, Yanfei and Scheytt, Christoph and Schmalz, Klaus and Borngräber, Johannes}}, booktitle = {{Microwave Integrated Circuits Conference (EuMIC), 2012 7th European}}, pages = {{183--186}}, title = {{{245 GHz subharmonic receiver in SiGe}}}, year = {{2012}}, } @inproceedings{24402, abstract = {{The design of a complex integrated transceiver for 121–124 GHz is presented. The transceiver consists of the transmitter with VCO, power amplifier and power detectors, the receiver with LNA, two mixers for quadrature receive path and variable gain amplifiers for IF-output and the digital control circuits with SPI-interface. A central part is the VCO with DAC and memory for on-chip storage of programmable frequency ramps for FMCW radar applications. The oscillator phase noise is -92 dBc/Hz at 1MHz offset. For calibration of the radar-system on chip, a frequency measurement unit is integrated. The radar chip has power consumption of 380 mW and occupies an area of 1.8 mm x 1.5 mm. Several examples of frequency ramp generation are presented. The chip is intended for integration together with antenna in a single package.}}, author = {{Debski, Wojciech and Winkler, Wolfgang and Sun, Yaoming and Marinkovic, Miroslav and Borngräber, Johannes and Scheytt, Christoph}}, booktitle = {{Microwave Integrated Circuits Conference (EuMIC), 2012 7th European}}, pages = {{191--194}}, title = {{{120 GHz Radar Mixed-Signal Transceiver}}}, year = {{2012}}, } @inproceedings{24403, abstract = {{A passive microwave sensor based on microstrip lines for characterizing cell cultivation in aqueous compartments is presented. The proposed design methodology leads to a highly sensitive biosensor structure, which is fabricated on Rogers 3003 material. It is shown that a sufficiently high sensitivity is achieved to monitor the cultivation stadium of a yeast culture based on detection of permittivity changes. The obtained measurement results show good agreement with the performed full 3D EM simulations. According to these results the presented biosensor is capable of characterizing the stage of yeast cultivation label-free and contactless.}}, author = {{Wessel, Jan and Schmalz, Klaus and Cahill, Brian and Gastrock, Gunter and Scheytt, Christoph}}, booktitle = {{Microwave Conference (EuMC), 2012 42nd European}}, title = {{{Microwave Biosensor for Characterization of Compartments in Teflon Cappilaries}}}, doi = {{10.23919/EuMC.2012.6459231 }}, year = {{2012}}, } @inproceedings{24404, abstract = {{Precise position is necessary for a robot to reliably localize itself and navigate in the environment. Robot position can be calculated internally or acquired from an external system. This paper presents a software architecture of a vision-based robot tracking system that can provide precise position information as well as identification of many robots. The software architecture has been designed to take into consideration the need for a flexible and scalable system that can interoperate with many similar systems and support different types of image sources, image processing, and outputs. With the architecture, future enhancements or replacements can be implemented as plug-ins, which can be easily integrated into the system. This paper also demonstrates the proposed architecture in different application scenarios}}, author = {{Tanoto, Andry and Li, Hanyi and Rückert, Ulrich and Sitte, Joaquin}}, booktitle = {{In Proceedings of the IEEE International Symposium on Intelligent Control (ISIC)}}, pages = {{pp. 19--24}}, title = {{{Scalable and Flexible Vision-Based Multi-Robot Tracking System}}}, doi = {{10.1109/ISIC.2012.6398261}}, year = {{2012}}, } @inproceedings{24405, abstract = {{Abstract— This paper presents a fully digital transmitter architecture based on a digital polar modulator (DPM) and switch-mode power amplifier (SMPA). A simple method for comparison and estimation of different digital modulation techniques for SMPA is described. An estimation of the proposed digital polar modulator properties was done by means of a 2.1..2.2 GHz class-F power amplifier. For a CDMA signal with 9.5 dB peak-to-average power ratio (PAPR), the class-F based amplifier module driven by DPM pulse train shows more than 1 W output power and more than 10 % of drain efficiency. }}, author = {{Ostrovskyy, Philip and Heuermann, Holger and Sadeghfam, Arash and Scheytt, Christoph}}, booktitle = {{Microwave Integrated Circuits Conference (EuMIC), 2012 7th European}}, location = {{Amsterdam}}, pages = {{659--662}}, title = {{{Performance Estimation of Fully Digital Polar Modulation driving a 2 GHz Switch-Mode Power Amplifier}}}, doi = {{10.23919/EuMC.2012.6459419}}, year = {{2012}}, } @article{24406, abstract = {{A subharmonic receiver for sensing applications in the 245 GHz ISM band has been proposed. The receiver consists of a single-ended common base LNA, a 60 GHz push-push VCO with 1/32 divider, a transconductance 4th subharmonic mixer and IF amplifier. The receiver is fabricated in fT/fmax=300/500 GHz SiGe: C BiCMOS technology. Its measured single-ended gain is 21 dB at 243 GHz with tuning range of 12 GHz, and the single- side band noise figure is 32 dB. The input 1-dB compression point is at -37 dBm. The receiver dissipates a power of 358 mW. Index Terms— SiGe technology, millimeter-wave circuits, 245 GHz, CB LNA, SHM, VCO, sub-harmonic receiver.}}, author = {{Mao, Yanfei and Schmalz, Klaus and Borngräber, Johannes and Scheytt, Christoph}}, journal = {{Microwave Theory and Techniques, IEEE Transactions on}}, number = {{99}}, pages = {{183--186}}, title = {{{245-GHz subharmonic receiver in SiGe }}}, volume = {{PP}}, year = {{2012}}, } @article{24407, abstract = {{A tunable fourth-order bandpass ΔΣ modulator (BDSM) designed and fabricated in 0.25μm SiGe BiCMOS technology is presented. The designed modulator relaxes switching conditions for the amplification stage of the switch-mode power amplifier in comparison to the BDSM architecture. The BDSM is clocked at 5 GHz, while the notch frequency can be tuned in a range of 2.1-2.2 GHz. The modulator achieves 46.6-dB signal-to-noise and distortion ratio in 10-MHz bandwidth for a sine-wave input at 2.2 GHz consuming 330 mW from a 3-V supply. The BDSM was also tested with a single-channel WCDMA signal. It has demonstrated 42.2-dBc adjacent channel leakage ratio at 5-MHz offset and less than 2.1% error vector magnitude over the tuning range.}}, author = {{Ostrovskyy, Philip and Gustat, Hans and Ortmanns, Maurits and Scheytt, Christoph}}, issn = {{1557-9670}}, journal = {{Microwave Theory and Techniques, IEEE Transactions on}}, number = {{8}}, pages = {{2524--2531}}, title = {{{A 5-Gb/s 2.1–2.2-GHz Bandpass \Delta \Sigma Modulator for Switch-Mode Power Amplifier}}}, doi = {{10.1109/TMTT.2012.2203143}}, volume = {{60}}, year = {{2012}}, } @article{24408, abstract = {{This paper presents a 60-GHz SiGe PA with a 29.2% power-added efficiency (PAE), a peak power of 16.8 dBm, and a peak output 1-dB compression (OP 1dB ) of 14 dBm. Its measured gain is 13.5 dB at 60 GHz with a corresponding 3-dB bandwidth of 47-74 GHz. The PAE is above 25% with a supply voltage from 2.2 to 4 V. A cascode stage has been analyzed and used as the amplifier core. The high PAE is achieved by pushing the upper transistor of the cascode stage to weak avalanche area and correct transistor sizing. The linearity is achieved by optimizing the input matching and emitter degeneration. Safe operation conditions of heterojunction bipolar transistors at dc and high frequencies have been investigated at weak avalanche area. A safe operation boundary for high frequencies is given based on our experimental results and analytical derivations. Large-signal stress tests have shown there is no performance degradation and have proved the validity of this safe operation boundary.}}, author = {{Sun, Yaoming and Fischer, Gerhard G. and Scheytt, Christoph}}, issn = {{1557-9670 }}, journal = {{Microwave Theory and Techniques, IEEE Transactions on}}, number = {{8}}, pages = {{ 2581 -- 2589}}, title = {{{A Compact Linear 60-GHz PA With 29.2% PAE Operating at Weak Avalanche}}}, doi = {{10.1109/TMTT.2012.2202684}}, volume = {{60}}, year = {{2012}}, } @article{24409, abstract = {{We propose a new circuit for the realization of transimpedance amplifiers (TIAs), targeted at reducing the input-referred noise of the TIA or alternatively increasing the bandwidth, without increasing the power dissipation. An intensive theoretical analysis of the method is given. A prototype chip is fabricated in 0.25- μm SiGe BiCMOS technology. The TIA has a gain of 71 dBΩ , a bandwidth of 20.5 GHz, and an average input-referred current noise density of 18 pA/√Hz . The circuit operates from a 2.5-V supply, and power dissipation is 57 mW.}}, author = {{Sedighi, Behnam and Scheytt, Christoph}}, journal = {{(Refa) FB/IE Zeitschrift für Unternehmensentwicklung und Industrial Engineering}}, number = {{8}}, pages = {{461--465}}, title = {{{Low-Power SiGe BiCMOS Transimpedance Amplifier for 25-GBaud Optical Links}}}, doi = {{10.1109/TCSII.2012.2204118}}, volume = {{59}}, year = {{2012}}, } @inproceedings{24410, abstract = {{This paper reviews recent results of wireless transmitter and receiver ICs at 122 and 245 GHz in 0.13 µm SiGe BiCMOS technology together with an efficient on-chip antenna. A transmitter IC with 5 dBm output power and directional onchip power measurement for built-in-self-test is presented. A 122 GHz passive HBT diode mixer design is discussed and results are shown. The mixer exhibits superior 1/f noise performance which makes it especially suitable for FMCW/CW radar sensors. Furthermore a highly integrated 245 GHz transmitter with 1 dBm maximum output power was realized. The IC dissipates only 380 mW. A low-loss on-chip antenna for 130 GHz with 60% efficiency was implemented and measured. It uses localized backside etching techniques and allows for simplified and very cost-efficient mm-wave packaging}}, author = {{Scheytt, Christoph and Sun, Yaoming and Schmalz, Klaus and Wang, Ruoyu}}, booktitle = {{IMS 2012 (International Microwave Symposium)}}, location = {{Montreal, QC, Canada}}, title = {{{SiGe BiCMOS Transceivers, Antennas, and Ultra-Low-Cost Packaging for the ISM Bands at 122 and 245 GHz}}}, doi = {{10.1109/MWSYM.2012.6259487}}, year = {{2012}}, } @inproceedings{24411, abstract = {{A 245 GHz transmitter for sensing applications has been realized, which consists of a push-push VCO with 1/64 frequency divider, a transformer- coupled one-stage power amplifier, and a frequency doubler. It is fabricated in 0.13μm SiGe:C BiCMOS technology with f T /f max of 300GHz/500GHz. The peak output power of the transmitter is 2 dBm. The 3-dB bandwidth reaches from 229 GHz to 251 GHz. The output power is 1 dBm at 245 GHz. The transmitter dissipates 0.29 W. Additionally, a test-circuit with an integrated two-stage power amplifier and a frequency doubler is presented, which reaches 1.4 dBm at 245 GHz and dissipates 0.19 W.}}, author = {{Schmalz, Klaus and Borngräber, Johannes and Heinemann, Bernd and Rücker, Holger and Scheytt, Christoph}}, booktitle = {{Radio Frequency Integrated Circuits Symposium (RFIC), 2012 IEEE}}, pages = {{195 --198}}, title = {{{A 245 GHz transmitter in SiGe technology}}}, doi = {{10.1109/RFIC.2012.6242262}}, year = {{2012}}, } @inproceedings{24412, abstract = {{In this publication an integrated dielectric sensor with read-out circuit in SiGe BiCMOS technology at 125GHz is presented. The sensor consist of a 500 µm shorted half-wave coplanar waveguide transmission line in the top metal layer. Read-out of the sensor is performed by measurement of its reflection coefficient with an integrated multiprobe reflectometer and signal source. The MMIC has been fabricated in a 190-GHz f T SiGe:C BiCMOS technology and assembled on a printed circuit board. Functionality of the sensor is demonstrated with a stimulus frequency from 118 to 133GHz with immersion of the sensor into a binary methanol-ethanol mixture.}}, author = {{Laemmle, Benjamin and Schmalz, Klaus and Scheytt, Christoph and Weigel, Robert and Kissinger, Dietmar}}, booktitle = {{Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International}}, pages = {{1 --3}}, title = {{{An integrated 125GHz Sensor with read-out circuit for permittivity measurement of liquids}}}, doi = {{10.1109/MWSYM.2012.6258392}}, year = {{2012}}, }