World Library  

 
  • Cover Image

79 Ghz Uwb Automotive Short Range Radar – Spectrum Allocation and ...

By: J. Dickmann; A. Sailer; G. Rollmann; H.-l. Bloecher

Description: Daimler AG, Group Research and Advanced Engineering, 89081 Ulm, Germany. Automotive UWB (Ultra-Wideband) short range radar (SSR) is on the market as a key technology for novel comfort and safety systems. SiGe based 79 GHz UWB SRR will be a definite candidate for the long term substitution of the 24 GHz UWB SRR. This paper will give an overview of the finished BMBF joint project KOKON and the recently started successing project RoCC, which concentrate on...

The ECC Decisions ECC/DEC/(04)10 (24 GHz SRR) and ECC/DEC/(04)03 (79 GHz SRR) are available in the Internet: ERO-Homepage (http://www.erodocdb.dk/doks/doccategoryECC.aspx?doccatid=1), 2004.; The EC Decisions 2005-50-EC (24 GHz SRR) and 2004-545-EC (79 GHz SRR) are available in the Internet: EC-Homepage: (http://www.europa.eu.int/eur-lex), 2005.; Proceedings of the BMBF joint project KOKON final meeting (Workshop WSW5 of the EuMW 2007), Munich, October, 2007.; Final repor...

Read More
  • Cover Image

Measured Response of Local, Mid-range and Far-range Discontinuitie...

By: H. Garbe; K. Münter; S. Battermann; T. Schrader

Description: Physikalisch-Technische Bundesanstalt, AG 2.21, Bundesallee 100, 38116 Braunschweig, Germany. This work describes a method to detect and to quantify any local or mid-range discontinuity on extended flat metal planes. Often these planes are used for antenna calibration (open area test site - OATS) or the plane could be the ground of a semi-anechoic chamber used in Electromagnetic Compatibility (EMC) testing. The measurement uncertainty of antenna ...

Read More
  • Cover Image

Electromagnetic Diffraction and Scattering of a Complex-source Bea...

By: H. Brüns; L. Klinkenbusch

Description: Institut für Elektrotechnik und Informationstechnik, Christian-Albrechts-Universität zu Kiel, Germany. A complex-source beam (CSB) is used to investigate the electromagnetic scattering and diffraction by the tip of a perfectly conducting semi-infinite circular cone. The boundary value problem is defined by assigning a complex-valued source coordinate in the spherical-multipole expansion of the field due to a Hertzian dipole in the presence of the PEC cir...

Bowman, J. J., Senior, T. B. A., and Uslenghi, P. L. E., Electromagnetic and acoustic scattering by simple shapes (Revised Printing), Hemisphere Pub. Corp., New York, 1987.; Blume, S. and Krebs, V.: Der Rückstreuquerschnitt des semiinfiniten Kreiskegels, Arch. Elektrotech., 77, 239–244, 1994; Katsav, M., Heyman, E., and Klinkenbusch, L.: Complex-source beam diffraction by an acoustically soft or hard circular cone, Electromagnetics in Advanced Applications (ICEAA), 2012 ...

Read More
  • Cover Image

Observations and Wrf Simulations of Fog Events at the Spanish Nort...

By: C. Yagüe; G. Maqueda; F. Salamanca; C. Román-cascón; S. Viana; M. Sastre

Description: Dpto. Geofísica y Meteorología, Universidad Complutense de Madrid, Spain. The prediction of fogs is one of the processes not well reproduced by the Numerical Weather Prediction (NWP) models. In particular, the role of turbulence in the formation or dissipation of fogs is one of the physical processed not well understood, and therefore, not well parameterized by the NWP models. Observational analysis of three different periods with fogs at the Spanish No...

Cuxart, J. and Jiménez, M. A.: Deep radiation fog in a wide closed valley: Study by numerical physics: its design and verification, Pure Appl. Geophys., doi:10.1007/s00024-011-0365-4, in press, 2012.; Janjic, Z. A.: The step-mountain coordinate: physics package, Mon. Weather Rev. 118, 1429–1443, 1990.; Cuxart, J., Yagüe, C., Morales, G., Terradellas, E., Orbe, J., Calvo, J., Fernandez, A. Soler, M. R., Infante, C., ...

Read More
  • Cover Image

Detection of Transient Disturbing Signals on Pc Boards : Volume 6,...

By: S. Korte; H. Garbe; O. Döring

Description: Institute of Electrical Engineering and Measurement Science, University of Hannover, Hannover, Germany. This paper shows a possibility to visualize signal propagation in electronic circuits. Instead of using various galvanic measurement points all over the circuit, a test method is shown which measures the radiated field of the printed circuit board. By use of a 2-dimensional positionable field probe it is possible to get an overview over the signals run...

Krzikalla, R. and ter Haseborg, J. L.: Practical design of protection circuits against extremely fast high power electromagnetics, EuroEM 2004, Magdeburg, Germany, July 2004.; Nitsch, D.: Coupling and effects of ultra wideband pulses into/on complex electronic systems, Ph.D. Thesis, University of Technology Hamburg–Harburg, Hamburg, Germany, 2005.; Camp, M.: Empfindlichkeit elektronischer Schaltungen gegen transiente elektromagnetische Feldimpulse, Ph.D. Thesis, Universi...

Read More
  • Cover Image

A Relation Between Algebraic and Transform-based Reconstruction Te...

By: W. Sauer-greff; R. Urbansky; M. Rosenbaum; S. Kiefhaber

Description: Technical University of Kaiserslautern, Chair of Communications Engineering, Germany. In this contribution a coherent relation between the algebraic and the transform-based reconstruction technique for computed tomography is introduced using the mathematical means of two-dimensional signal processing. There are two advantages arising from that approach. First, the algebraic reconstruction technique can now be used efficiently regarding memory usage with...

Bender, R., Gordon, R., and Herman, G.: Algebraic Reconstruction Techniques (ART) for Three-Dimensional Electron Microscopy and X-Ray Photography, in J. Theoret. Biol., 29, 471–481, 1970.; Cho, Z.-H., Jones, J. P., and Singh, M.: Foundations of medical imaging, New York: Wiley, 1993, ISBN 0-471-54573-2, 1993.; Deans, S.: The Radon transform and some of its Applications, New York, Wiley, ISBN 0-471-89804-X, 1983.; Kaczmarz, S.: Angenäherte Auflösung von Systemen linearer ...

Read More
  • Cover Image

Investigation of Rf Transmission Properties of Human Tissues : Vol...

By: E. M. Biebl; A. Schwentner; D. Werber

Description: Technische Universität München, Fachgebiet Höchstfrequenztechnik, Arcisstraße 21, 80333 München, Germany. RF transmission properties of human tissues were investigated in the frequency range from 50 MHz to 1 GHz. This work was motivated by the increasing interest in communication links between medically active implants and external interrogator units. We investigated theoretically and experimentally the transmission loss between an implant and an extern...

Gabriel,~C., Gabriel,~S.: Dielectric properties of biological tissues: I-III, Physics in Medicine and Biology, 41, 2231–22903, 1996.; Hartsgrove,~G., Kraszewski,~A., and Surowiec,~A.: Simulated Biological Materials for Electromagnetic Radiation Absorption Studies, Bioelectromagnetics, 8, 29–36, 1987.; Wolf,~B., Kraus,~M., and Sieben,~U.: Potential of microsensor-based feedback bioactuators for biophysical cancer treatment, Biosensors and Bioelectronics, 12, 301–309, 1997.

Read More
  • Cover Image

Seasonal and Inter-annual Variability of the Quasi 2 Day Wave Over...

By: Ch. Jacobi; F. Lilienthal

Description: Institute for Meteorology, University of Leipzig, Stephanstr. 3, 04103 Leipzig, Germany. The quasi 2 day wave (QTDW) over Collm (51° N, 13° E) has been studied between September 2004 and September 2013 using a VHF meteor radar. The 9 year mean amplitudes show a strong summer maximum with several irregular bursts and much weaker winter maxima. In summer, the meridional amplitude is slightly larger than the zonal one with about 15 m s−1 at 91 k...

Babadshanov, P. B., Kalchenko, B. V., Kashcheyev, B. L., and Fedynsky, V. V.: Winds in the equatorial lower thermosphere, Proc. Acad. Sci. USSR, 208, 1334–1337, 1973 (in Russian).; Bristow, W. A., Yee, J.-H., Zhu, X., and Greenwald, R. A.: Simultaneous observations of the July 1996 2-day wave event using the Super Dual Auroral Radar Network and the High Resolution Doppler Imager, J. Geophys. Res., 104, 12715–12721, doi:10.10...

Read More
  • Cover Image

Spectral Signature Analysis – Bist for Rf Front-ends : Volume 1, I...

By: H.-j. Jentschel; U. Pursche; D. Lupea

Description: Technische Universität Dresden, Institut für Verkehrsinformationssysteme, Mommsenstr. 13, D-01062 Dresden. In this paper, the Spectral Signature Analysis is presented as a concept for an integrable self-test system (Built-In Self-Test – BIST) for RF front-ends is presented. It is based on modelling the whole RF front-end (transmitter and receiver) on system level, on generating of a Spectral Signature and of evaluating of the Signature Response. Becaus...

Read More
  • Cover Image

Power Supply Network Design: a Case Study Driven Approach : Volume...

By: T. Missal; D. Schmitt-landsiedel; J. Berthold; S. Henzler; M. Eireiner

Description: Institute for Technical Electronics, Technical University Munich, Germany. A study, based on product related scenarios, on power supply integrity issues is conducted. The effectiveness of specific design parameters depends strongly on the expected loading of the power distribution grid. Therefore, the commonly used approach to only use an even current distribution can lead to non-optimal power grid designs. For power grid optimization, a problem reducti...

Benoit, M., Taylor, S., Overhauser, D., and Rochel, S.: Power Distribution in High-Performance Design, in: Proceedings of IEEE Symposium of Low-Power Electronics Design, 274–278, 1998.; ITRS: International Technology Roadmap for Semiconductors, http://public.itrs.net/, 2005.; Dharchoudhury, A., Panda, R., Blaauw, D., and Vaidyanathan, R.: Design and Analysis of Power Distribution Networks in PowerPC Mircoprocessors, in: Proceedings of Design Automation Converence, 738–74...

Read More
  • Cover Image

Cordic Based Algorithms for Software Defined Radio (Sdr) Baseband ...

By: B. Heyne; J. Götze

Description: University of Dortmund, Information Processing Lab, Otto-Hahn-Str. 4, 44227 Dortmund, Germany. This paper presents two Cordic based algorithms which may be used for digital baseband processing in OFDM and/or CDMA based communication systems. The first one is a linear least squares based multiuser detector for CDMA incorporating descrambling and despreading. The second algorithm is a pure Cordic based FFT implementation. Both algorithms can be implemented...

3GPP: TS25.213 V5.0.0 - Spreading and Modulation (FDD), Technical specification group radio access network, 3rd Generation Partnership Project (3GPP), 2002.; Heyne, B. and Goetze, J.: A Cordic Based Equalizer For Multiuser Detection in WCDMA Systems, in: IEEE Workshop on Signal Processing Systems (SiPS2005), Athens, Greece, 2005.; IEEE Std 802.11a-1999: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications, High-speed Physical Layer in the 5 GH...

Read More
  • Cover Image

Highly Efficient Integrated Rectifier and Voltage Boosting Circuit...

By: T. Hehn; Y. Manoli; M. Ortmanns; D. Maurath; C. Peters

Description: Chair of Microelectronics, Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Koehler-Allee 102, 79110 Freiburg, Germany. This paper presents novel circuit concepts for integrated rectifiers and voltage converting interfaces for energy harvesting micro-generators. In the context of energy harvesting, usually only small voltages are supplied by vibration-driven generators. Therefore, rectification with minimum voltage losses a...

Ghovanloo, M. and Najafi, K.: Fully integrated wideband high-current rectifier for inductively powered devices, IEEE J. Solid State Circuits, 39, 1976–1984, 2004.; Gobbi, L., Cabrini, A., and Torelli, G.: Impact of Parasitic Elements on CMOS Charge Pumps: a Numerical Analysis, IEEE International Symposium on Circuits and Systems (ISCAS), May 2006.; Lehmann, T. and Moghe, Y.: On-chip active power rectifiers for biomedical applications, IEEE International Symposium on Circ...

Read More
  • Cover Image

Efficient Computation of Source Magnetic Scalar Potential : Volume...

By: W. M. Rucker; A. Buchau; W. Hafla

Description: Institute for Theory of Electrical Engineering, Stuttgart, Germany. Magnetic field problems are often excited by a known source field which itself is caused by free currents. Some formulations to solve the problem require knowledge of the source magnetic scalar potential whose gradient is the source field. In general, it has to be computed as a line integral. An approach for efficient computation of this potential has been developed that is based on an ...

Binns,~K J., Lawrenson,~P J., and Trowbridge,~C W.: The Analytical and Numerical Solution of Electric and Magnetic Fields, John Wiley and Sons, 1992.; Buchau,~A., Hafla,~W., and Rucker,~W M.: Fast and efficient 3-D boundary element method for closed domains, COMPEL, 23, 859–865, 2004.; Greengard,~L. and Rokhlin,~V.: The rapid evaluation of potential fields in three dimensions, Lecture Notes in Mathematics, 1360, edited by Anderson,~C. and Greengard,~C., Berlin, Germany: ...

Read More
  • Cover Image

Parameter Estimation Under Non-stationary Circumstances Using Exte...

By: K. Görner; M. Lechtenberg; J. Götze; C. Rehtanz

Description: Information Processing Lab, TU Dortmund, Otto-Hahn-Str. 4, 44227 Dortmund, Germany. In the context of transient processes in power system measurements, a sampled signal is analyzed with respect to electro-magnetic influences. These are most likely superposed sinusoids that can be found next to the fundamental system sinusoid. However, such signal is not stationary, i.e. has a varying model order which means that temporary and exponentially damped sinusoi...

Abed-Meraim, K., Chkeif, A., and Hua, Y.: Fast orthonormal PAST algorithm, IEEE Signal Proc. Lett., 7, 60–62, 2000.; Badeau, R., Richard, G., and David, B.: Adaptive ESPRIT algorithm based on the PAST subspace tracker, Int. Conf. Acoust. Spee., Vol. 6, 229–232, 2003.; Badeau, R., Richard, G., and David, B.: Fast and Stable YAST Algorithm for Principal and Minor Subspace Tracking, IEEE T. Signal Proces., 56, 3437–3446, 2008.; Banerjee, P. and Srivastava, S.: A Subspace-Ba...

Read More
  • Cover Image

Entwurfskonzept Einer Car2Car-multiband-dachantenne : Volume 10, I...

By: Y. Wang; W. Mathis; M. Reit

Description: Institut für Theoretische Elektrotechnik, Leibniz Universität Hannover, Appelstr. 9A, 30167 Hannover, Germany. Due to the vastly increasing use of wireless services in the car, such as WiFi, Car2Car and LTE, the requirements on bandwidth and radiation pattern of the roof antenna systems become more challenging. In this work, a design concept for multi-band roof antenna systems is presented. We aim to get a higher bandwidth and an almost circular radiatio...

Balanis, C. A.: Antenna Theory Analysis and Design, 3. Edn., John Wiley and Sons, Inc., USA, 2005.; Dan, S. and Consultant, A.: Near-Field Test Facility Design Antenna Measurement Techniques Association Conference, TRW Space Communications Division, Antenna Laboratory, Redondo Beach, Canada, 1985; Europ�ische Union: Regelung Nr. 26 der Wirtschaftskommission der Vereinten Nationen f�r Europa (UN/ECE) – Einheitliche Bedingungen f�r die Genehmigung der Kraftfahrzeuge hinsic...

Read More
  • Cover Image

New Experiments to Validate the Radiation Pattern of the Middle At...

By: R. Latteck; W. Singer; G. Stober; T. Renkwitz; M. Rapp

Description: Leibniz-Institute of Atmospheric Physics at the Rostock University, Schloss-Str. 6, 18225 Kühlungsborn, Germany. The Middle Atmosphere Alomar Radar System (MAARSY) is a monostatic radar with an active phased array antenna designed for studies of phenomena in the mesosphere and lower thermosphere. Its design in particular the flexible beam forming and steering capability makes it to a powerful instrument to perform observations with high angular and tempo...

Baars, J. W. M., Mezger, P. G., and Wendker, H.: The flux density values of standard sources used for antenna calibrations, Tech. rep., National Radio Astronomy Observatory, 1964.; Boland, J. W., Hollinger, J. P., Mayer, C. H., and McCullough, T. P.: Polarization of Cygnus A, Taurus A, and Cassiopeia A at 2.07 Centimeters, Astrophys. J., 144, 437–439, 1966.; Cane, H.: A 30 MHz map of the whole sky, Australian Journal of Physics, 31, 561–565, 1978.; Campistron, B., Despau...

Read More
  • Cover Image

Processing and Analysing an Ensemble of Climate Projections for th...

By: J. Namyslo; S. Plagemann; F. Imbery

Description: German Weather Service, Offenbach, Germany. The research programme KLIWAS, funded by the German Federal Ministry of Transport, Building and Urban affairs is focussed on climate change and its impacts on waterways and navigation for Germany in the 21th century. In order to derive sound statements about the range of possible future climate changes, KLIWAS use hydro-meteorological information derived from a wide variety of global and regional climate model...

Teutschbein, C. and Seibert, J.: Is bias correction of Regional Climate Model (RCM) simulations possible for non-stationary conditions?, Hydrol. Earth Syst. Sci. Discuss., 9, 12765–12795, doi:10.5194/hessd-9-12765-2012, 2012.; Theme{ß}l, M. J., Gobiet, A., and Heinrich, G.: Empirical-statistical downscaling and error correction of regional climate models and its impact on the climate change signal, Climatic Change,...

Read More
  • Cover Image

Modeling of Field Singularities at Dielectric Edges Using Grid Bas...

By: E. Gjonaj; U. Römer; R. Schuhmann; T. Weiland; C. Classen

Description: University of Paderborn, Fachgebiet Theoretische Elektrotechnik, Germany. Electric field singularities at sharp metallic edges or at a dielectric contact line can be described analytically by asymptotic expressions. The a priori known form of the field distribution in the vicinity of these edges can be used to construct numerical methods with improved accuracy. This contribution focuses on a modified Finite Integration Technique and on a Discontinuous G...

Arnold, D N., Brezzi, F., Cockburn, B., and Marini, L D.: Unified Analysis of Discontinuous Galerkin Methods for Elliptic Problems, SIAM Journal on Numerical Analysis, 39, 1749–1779, 2002.; Beilenhoff, K. and Heinrich, W.: Treatment of field singularities in the finite-difference approximation, Microwave Symposium Digest, 1993., IEEE MTT-S International, 2, 979–982, 1993.; Chahine, E., Laborde, P., and Renard, Y.: Crack tip enrichment in the XFEM method using a cut-off f...

Read More
  • Cover Image

Accelerating the Numerical Computation of Indirect Lightning Effec...

By: J. Anatzki; F. Gronwald

Description: Institute of Electromagnetic Theory, Hamburg University of Technology, Harburger Schloss Str. 20, 21079 Hamburg, Germany. In the context of numerical computation of indirect lightning effects it is customary to use volume-discretizing methods in time domain, such as the Finite Difference Time Domain (FDTD) method, the Finite Integration Technique (FIT), or the Transmission Line Matrix (TLM) method. If standard lightning electromagnetic pulses (LEMPs) of ...

Gustavsen, B. and Semlyen, A.: Rational Approximation of Frequency Domain Responses by Vector Fitting, IEEE Trans. Power Delivery, 14(3), 1052–1061, 1999.; Apra, M., D'Amore, M., Gigliotti, K., Sarto, M. S. and Volpi, V.: Lightning Indirect Effects Certification of a Transport Aircraft by Numerical Simulation, IEEE Trans. Electromagn. Compat., 50(3), 513–523, 2008.; Antonini, G.: Spice Equivalent Circuits of Frequency-Domain Responses, IEEE Trans. Electromagn. Compat., 4...

Read More
  • Cover Image

Design Issues of Arithmetic Structures in Adiabatic Logic : Volume...

By: F. Chouard; J. Fischer; D. Schmitt-landsiedel; Ph. Teichmann

Description: Institute for Technical Electronics, Technical University Munich, Munich, Germany. Since adiabatic logic uses a supply that incorporates both supply voltage and clock signal in one line, adiabatic logic systems have a built-in micro-pipelined architecture. Considering this fact, different design constraints have to be observed compared to static CMOS designs. Complex arithmetic building blocks, like multipliers, mainly consist of adders. Therefore, a co...

Amirante, E.: Adiabatic Logic in Sub-Quartermicron CMOS Technologies, vol 13 of Selected Topics of Electronics and Micromechatronics\/, Shaker, 2004.; Beaumont-Smith, A. and Lim, C.-C.: Parallel prefix adder design, in: 15th IEEE Symposium on Computer Arithmetic, 218–225, 2001.; Brent, R P. and Kung, H T.: A regular layout for parallel adders, IEEE Transactions on Computers, C-31, 260–264, 1982.; Fischer, J.: Adiabatische Schaltungen und Systeme in Deep-Submicron-CMOS-Te...

Read More
 
1
|
2
|
3
Records: 1 - 20 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.