@inproceedings{24262, abstract = {{Currently, all drone manufactures face the same problem: flight safety utility will become mandatory to obtain the legal admission for broad commercial use of drones. This means that on-board obstacle detection and collision avoidance is a must-have in order to overcome existing legal barriers and acceptance issues. Some of the currently available sensors are too large, too heavy, or can be poorly integrated into existing systems. During the exhibition a demonstration of a novel micro-sensor operating at 120 GHz will be given and participants will have the chance to experience the device first-hand.}}, author = {{Nava, Federico and Genschow, Dieter and Scheytt, Christoph}}, booktitle = {{DRONE Berlin 2016}}, title = {{{Obstacle detection using a miniaturized radar sensor operating at 120GHz ISM band}}}, year = {{2016}}, } @inproceedings{24271, abstract = {{An ultra-broadband analog correlator consisting of a four-quadrant multiplier and an ultra-fast resettable integrator using only NPN transistors was designed, fabricated, and measured. For the integrator, a cross-coupled transistor pair is used as a negative resistance generator. A novel ultra-fast reset circuit is implemented which allows to reset the integrator within very short time of 120 ps. The chip was fabricated using 130 nm SiGe BiCMOS technology with fT of 250 GHz and f max of 300 GHz. In the measurements carried out on printed circuit board, the correlator operated without noticeable performance degradation with inputs up to 33 Gbps which correspond to a bandwidth of more than 24 GHz. The correlator exhibits high linearity with output P1dB of more than 9.9 dBm (700 mV diff ) for both inputs. It dissipates 122.5 mW for the core circuit excluding the 50 Ω output driver. To the knowledge of the authors, the circuit represents the fastest analog correlator published so far. It can be used for spread spectrum communication, radar signal processing, and measurement applications.}}, author = {{Javed, Abdul Rehman and Scheytt, Christoph and Von der Ahe, Uwe}}, booktitle = {{IEEE Bipolar/BiCMOS Circuits and Technology Meeting}}, issn = {{https://ieeexplore.ieee.org/document/7738962}}, publisher = {{IEEE}}, title = {{{Linear ultra-broadband NPN-only analog correlator at 33 Gbps in 130nm SiGe BiCMOS technology}}}, doi = {{ 10.1109/BCTM.2016.7738962}}, year = {{2016}}, } @inproceedings{24270, abstract = {{In this paper a prototype of an ultra-compact continuous-wave (CW) and frequency-modulated continuous-wave (FMCW) radar system using a highly-integrated radar chip and in-package antennas will be presented. An introduction will be given on the concept of antenna integration for millimeter-wave radar and the advantages of such systems. The radar then will be described in its main components, a 122 GHz Integrated Circuit including in-package antennas as well as the acquisition and processing system realized using flexible printed circuit board (FLEX PCB) technology. Furthermore initial measurements of the radar system will be presented and explained. }}, author = {{Nava, Federico and Scheytt, Christoph and Zwick, Thomas and Pauli, Mario and Goettel, B. and Winkler, Wolfgang}}, booktitle = {{ 3rd International Conference on System-Integrated Intelligence}}, title = {{{Ultra-compact 122GHz Radar Sensor for Autonomous Aircrafts}}}, doi = {{ 10.1016/j.protcy.2016.08.051}}, year = {{2016}}, } @inproceedings{24266, abstract = {{Recently electronic-photonic integrated circuits (EPIC) technology platforms became available [1] which allow fabrication of very compact and fast monolithic receivers. However, although the cointegration of electronics and photonics on the same chip allows for novel circuit topologies which could help to improve circuit performance quite often transmitter and receiver circuit design is using more or less conventional approaches. We propose a novel architecture that effectively utilizes the benefits of the EPIC technology such as: very short interconnects between the photodiode and the amplifier, symmetrical and compact photodiode structure with low operating voltages. Our architecture shown in Fig. 1 features fully-differential input stage, automatic biasing of the photodiode, DC coupling between diode and transimpedance amplifier (TIA) and very small footprint.}}, author = {{Gudyriev, Sergiy and Scheytt, Christoph and Meister, Stefan and Knoll, Dieter and Lischke, Stefan and Zimmermann, Lars and Meuer, Christian}}, booktitle = {{IEEE Group IV Photonics Conference}}, title = {{{ Low-Power, Ultra-compact, Fully-differential 40Gbps Direct Detection Receiver in 0.25μm Photonic BiCMOS SiGe Technology}}}, doi = {{10.1109/GROUP4.2016.7739126}}, year = {{2016}}, } @inproceedings{24267, author = {{Scheytt, Christoph}}, booktitle = {{Microelectronics Seminar}}, title = {{{Recent Advances in Millimeter-Wave-and Electronic-Photonic System-on-Chip Design}}}, year = {{2016}}, } @inproceedings{24268, author = {{Scheytt, Christoph}}, booktitle = {{DFG Rundgespräch:"Disruptive system concepts using electronic-photonic integration}}, title = {{{Electronic-Photonic System-On-Chip}}}, year = {{2016}}, } @inproceedings{24287, abstract = {{Terahertz frequency band of 0.06 - 10 THz is especially interesting for ultra-high-speed wireless communication to achieve data rates of 100 Gbps or higher. To accommodate this demand, advanced terahertz signal processing techniques need to be investigated. Parallel Sequence Spread Spectrum (PSSS) is a physical layer (PHY) baseband technology that seems to be suited for being used for ultra-high speed wireless communication since the receiver architecture is especially simple and can be implemented almost completely in analog hardware. In this paper, a PSSS modulated signal at a chip rate of 20 Gcps with a spectral efficiency of (only) 1 bit/s/Hz is transmitted using a linearity limited 240 GHz wireless frontend. PSSS transceiver models are realized offline in MATLAB/Simulink. The PSSS transmitter generates the PSSS modulated symbols that are loaded onto an Arbitrary Waveform generator (AWG) and then transmitted using the available 240 GHz wireless frontend. A Digital Storage Oscilloscope (DSO) samples and stores the received signal. The PSSS receiver performs synchronization, channel estimation and demodulation. For a coded data rate of 20 Gbps, an eye opening of 40% and a BER of 5.4·10 -5 has been measured. These results are highly promising to achieve data rates of up to 100 Gbps with PSSS modulation using a RF-frontend having higher linear operating range and thus allowing increasing the bandwidth efficiency to 4 b/s/Hz.}}, author = {{KrishneGowda, Karthik and Messinger, Tobias and Wolf, Andreas and Kraemer, Rolf and Kallfass, Ingmar and Scheytt, Christoph}}, booktitle = {{ICUWB 2015}}, title = {{{Towards 100 Gbps Wireless Communication in THz Band with PSSS Modulation: A Promising Hardware in the Loop Experiment}}}, doi = {{10.1109/ICUWB.2015.7324520}}, year = {{2015}}, } @inproceedings{24286, author = {{Scheytt, Christoph and Javed, Abdul Rehman}}, booktitle = {{Workshop on Approximate Computing}}, location = {{Paderborn}}, title = {{{Shifting the Analog-Digital Boundary in Signal Processing: Should We Use Mixed-Signal "Approximate" Computing?}}}, year = {{2015}}, } @inproceedings{24291, abstract = {{In this paper, a miniaturized 122 GHz ISM band FMCW radar is used to achieve micrometer accuracy. The radar consists of a SiGe single chip radar sensor and LCP off-chip antennas. The antennas are integrated in a QFN package. To increase the gain of the radar, an additional lens is used. A combined frequency and phase evaluation algorithm provides micrometer accuracy. The influence of the lens phase center on the beat frequency phase and hence, the overall accuracy is shown. Furthermore, accuracy limitations of the radar system over larger measurement distances are investigated. Accuracies of 200 μm and 2 μm are achieved over a distance of 1.9 m and 5 mm, respectively.}}, author = {{Scherr, Steffen and Göttel, Benjamin and Ayhan, Serdal and Bhutani, Akanksha and Pauli, Mario and Winkler, Wolfgang and Scheytt, Christoph and Zwick, Thomas}}, booktitle = {{European Microwave Week 2015}}, title = {{{Miniaturized 122 GHz ISM Band FMCW Radar with Micrometer Accuracy}}}, doi = {{10.1109/EuRAD.2015.7346291}}, year = {{2015}}, } @inproceedings{24289, author = {{Müller, Wolfgang and Wu, Liang and Scheytt, Christoph and Becker, Markus and Schoenberg, Sven}}, booktitle = {{Proceedings of the 1st International Workshop on Resiliency in Embedded Electronic Systems (REES 2014)}}, editor = {{Mueller-Gritschneder, Daniel and Müller, Wolfgang and Mitra, Subhasish}}, title = {{{On the Correlation of HW Faults and SW Errors}}}, year = {{2015}}, } @inproceedings{24294, abstract = {{Parallel Sequence Spread Spectrum (PSSS) is a physical layer (PHY) baseband technology which is gaining interest for both wireless and wired multi-gigabit communication systems. PSSS is well suited for mixed signal transceiver implementation including channel equalization and allows for a reduction in power dissipation by avoiding high speed data converters. The architecture of a mixed signal baseband processor for 100 Gbps wireless communication is described that reduces the implementation complexity and results in a consequent reduction in power dissipation and chip area.}}, author = {{Javed, Abdul Rehman and Scheytt, Christoph and KrishneGowda, Karthik and Kraemer, Rolf}}, booktitle = {{Wireless and Microwave Technology Conference (WAMICON)}}, pages = {{1--4}}, publisher = {{IEEE}}, title = {{{System Design Considerations for a PSSS transceiver for 100Gbps wireless communication with emphasis on mixed Signal implementation}}}, doi = {{10.1109/WAMICON.2015.7120419}}, year = {{2015}}, } @inproceedings{24293, abstract = {{Parallel Sequence Spread Spectrum (PSSS) is a physical layer baseband technology wherein parallel data streams are transmitted simultaneously by spreading them using orthogonal codes. PSSS was selected for the wireless sensor network standard IEEE802.15.4-2006 to increase data rate and improve performance in fading channels for frequency bands below 1 GHz. Since then it has gained interest for both wireless and wired communication links.}}, author = {{Javed, Abdul Rehman and Scheytt, Christoph}}, booktitle = {{1st URSI Atlantic Radio Science Conference (URSI AT-RASC 2015)}}, title = {{{System Design and Simulation of a PSSS Based Mixed Signal Transceiver for a 20 Gbps Bandwidth Limited Communication Link}}}, doi = {{10.1109/URSI-AT-RASC.2015.7302987}}, year = {{2015}}, } @inproceedings{24292, author = {{Scheytt, Christoph and Javed, Abdul Rehman}}, booktitle = {{European Microwave Week 2015}}, title = {{{Mixed-Signal Baseband Processing for 100 Gbit/s Communications}}}, year = {{2015}}, } @inproceedings{24297, author = {{Javed, Abdul Rehman and Scheytt, Christoph and Kraemer, Rolf and Messinger, Tobias and Kallfass, Ingmar}}, location = {{Nürnberg, Germany}}, title = {{{Mixed-mode Baseband for 100 Gbit/s Wireless Communications}}}, year = {{2015}}, } @misc{24295, author = {{Scheytt, Christoph and Javed, Abdul Rehman}}, booktitle = {{ForschungsForum Paderborn}}, number = {{18}}, pages = {{25--30}}, title = {{{100 Gigabit pro Sekunde und mehr für das drahtlose Hochgeschwindigkeits-Internet}}}, year = {{2015}}, } @inproceedings{24290, abstract = {{The recent rapid development of silicon photonics technology has spurred the process of on-chip integration of all kinds of opto-electronic components. One of the most common components of such type is the opto-electrical receiver. The monolithic implementation of the receiver could potentially have lower power consumption, higher sensitivity and bandwidth due to very short diode to amplifier connection length, which has very low parasitic capacitance and series resistance. The SiGe photodiode itself is also very compact, thus lowering the junction capacitance and improving its bandwidth. Among the different optical communication systems, coherent transmission lately received a lot of attention due to the rising requirements of the optical link capacity, and it was shown that this particular approach could benefit greatly from the monolithic integration, since the major component required for the demodulation on the receiver side – 90° optical hybrid – could be implemented fully passive and directly on the same chip as the receiver itself, together with digital post-processing circuitry. Despite the initial complexity of the modulation scheme, advanced silicon photonics components like this optical hybrid could make coherent transmission attractive even for short-range optical links. I would like to present the actual designs, implementation and measurement results of 90° fully passive optical hybrids, implemented in the IHP SG25PIC (passive photonics IC) technology. One of the designs is based on 4x4 multimode interferometer (MMI). The other one is based on two separate 2x2 MMIs with additional delay element. The final designs didn’t require any additional tuning after fabrication and have shown sufficient precision and performance for a coherent system design. The results of this work were later used for the design of monolithic coherent receiver.}}, author = {{Gudyriev, Sergiy and Scheytt, Christoph}}, booktitle = {{Kleinheubacher Tagung 2015}}, pages = {{18}}, title = {{{Silicon photonics 90° optical hybrid design for coherent receivers}}}, year = {{2015}}, } @inproceedings{24300, author = {{Wessel, Jan and Schmalz, Klaus and Cahill, Brian and Scheytt, Christoph}}, booktitle = {{Elektrotechnisches Kolloquium}}, title = {{{Design of an Electrical Interferometer at 120 GHz for Contactless Permittivity Characterization}}}, year = {{2014}}, } @inproceedings{24308, abstract = {{A 115 GHz slow wave transmission line intended for phase detection based integrated biosensors is presented. The structure was fabricated in a 130 nm SiGe process. It achieved the targeted overall phase shift of 1° at 115 GHz. Moreover, the phase can be adjusted by 16 switches using Heterojunction Bipolar (HBT) transistors leading to a phase resolution of 0.125°. The change in input and output matching over all configurations of the switches is not higher than 0.8 dB and the transmission S 21 varies with less than 0.7 dB. To the authors knowledge, it is the first switchable slow wave structure using microstrip transmission lines along with a bipolar switch circuitry. Moreover, the presented structure provides a very powerful solution for real-time digital read-outs in integrated biosensors, without need of additional signal processing steps.}}, author = {{Wessel, Jan and Schmalz, Klaus and Scheytt, Christoph and Meliani, Chafik}}, booktitle = {{Microwave Symposium (IMS), 2014 IEEE MTT-S International}}, pages = {{1 -- 3}}, publisher = {{IEEE}}, title = {{{ Switchable slow wave transmission line in 130 nm SiGe technology at 115 GHz for phase detection based biosensors}}}, doi = {{10.1109/MWSYM.2014.6848446}}, year = {{2014}}, } @inproceedings{24303, abstract = {{A calibration technique as well as measurement results for a 7 GHz Biosensor are presented. It is shown that the applied sensor structure can be calibrated by adjusting the phase of a sensing element's transmission S21. This is realized by slowing down the wave traveling a microstrip line serving as a reference in the differential sensor structure. The dielectric properties along with certain physical boundaries of an obstacle covering parts of the microstrip line evoke that effect. Measurements with an ethanol serious along with simulation results showed that sensitivity can be increased substantially with this calibration technique. A change of the real part of the sample's permittivity of 48 leads to a 18 MHz frequency shift.}}, author = {{Wessel, Jan and Schmalz, Klaus and Scheytt, Christoph and Meliani, Chafik and Cahill, Brian}}, booktitle = {{European Microwave Conference (EuMC)}}, pages = {{699 -- 702}}, publisher = {{IEEE}}, title = {{{A 7 GHz biosensor for permittivity change with enhanced sensitivity through phase compensation}}}, doi = {{10.1109/EuMC.2014.6986530}}, volume = {{44th}}, year = {{2014}}, } @inproceedings{24307, abstract = {{There is a continuous increase of bandwidth-demanding services such as ultra HDTV, 3D TV, etc. which will require data rates up to 100-400 Gb/s for short range wireless communication. This paper introduces a novel mixed-mode design where both analog and digital domain design is considered, which helps in the reduction of power consumption. Parallel Sequence Spread Spectrum (PSSS) is used for physical layer (PHY) baseband technology, which considerably alleviates both transmitter and receiver design.}}, author = {{Kraemer, Rolf and Wolf, Andreas and Scheytt, Christoph and Kallfass, Ingmar and KrishneGowda, Karthik}}, booktitle = {{2014 IEEE 15th Annual IEEE Wireless and Microwave Technology Conference (WAMICON)}}, publisher = {{IEEE}}, title = {{{Wireless 100 Gb/s: PHY layer Overview and Challenges in THz freqency band}}}, doi = {{10.1109/WAMICON.2014.6857743}}, year = {{2014}}, }