Poslední příspěvky

  • Geometrical Configuration of Cabling as Factor Influencing the Reproducibility of EMC Immunity Tests 

    Hallon, J.; Kovac, K.; Szolik, I. (Společnost pro radioelektronické inženýrství, 2006-12)
    The paper deals with analysis of the influence of geometrical configuration of device cabling upon voltages induced in cable interfaces. The analyzed properties are the cable height and the cable length for common mode ...
  • Multipath Propagation of UWB Through-Wall Radar and EMC Phenomena 

    Schejbal, V.; Cermak, D.; Nemec, Z.; Pidanic, J.; Konecny, J.; Bezousek, P.; Fiser, O. (Společnost pro radioelektronické inženýrství, 2006-12)
    The UWB (ultra wide band) radar output signals can be substantially affected due to electromagnetic wave propagation through obstacles (such as walls) and multipath effects, too. Multipath effects are analyzed and simulated ...
  • Electromagnetic Compatibility of Matrix Converter System 

    Lettl, J.; Fligl, S. (Společnost pro radioelektronické inženýrství, 2006-12)
    The presented paper deals with matrix converters pulse width modulation strategies design with emphasis on the electromagnetic compatibility. Matrix converters provide an all-silicon solution to the problem of converting ...
  • Estimation of EMI Filter Performance for the \"Worst Case\" System 

    Drinovsky, J.; Svacina, J. (Společnost pro radioelektronické inženýrství, 2006-12)
    This paper deals with the performance problem of the EMC filters. The core of this problem in EMC filter is the uncertainty of impedances that are connected to the input and output of a filter. In addition, an estimation ...
  • Synthesis of New Biquad Filters Using Two CFOAs 

    Vochyan, J. (Společnost pro radioelektronické inženýrství, 2006-12)
    This paper deals with synthesis based on new autonomous circuit using two current feedback operational amplifiers. Four possible second-order structures are derived and several active RC filters are described. One new ...
  • Broadband Measuring of Shielding Covers 

    Krcmar, V. (Společnost pro radioelektronické inženýrství, 2006-12)
    The novel method utilizing coupled lines for the dielectric property measurement of shielding covers of composite materials is described. Characteristics of coupled lines designed by two symmetrical strip lines with a ...
  • A Robust Adaptive MMSE Rake Receiver for DS-CDMA System in a Fast Multipath Fading Channel 

    Jeong, K.; Yokoyama, M.; Uehara, H. (Společnost pro radioelektronické inženýrství, 2006-12)
    In this paper, we propose a robust adaptive minimum mean square error (MMSE) Rake receiver for asynchronous DS-CDMA systems. The receiver uses the modified MMSE criterion that incorporates the differential detection and ...
  • Wideband Measurement in a Small Shielded Box Using Equiangular Spiral Antennas 

    Korinek, T.; Piksa, P.; Mazanek, M. (Společnost pro radioelektronické inženýrství, 2006-12)
    Small shielded boxes are nowadays widely used for measurement of EMS, EMI and sensitivity properties of different devices. This paper deals with an improvement of commercial small shielded box parameters for a measurement ...
  • Methods for High Power EM Pulse Measurement 

    Drexler, P.; Fiala, P. (Společnost pro radioelektronické inženýrství, 2006-12)
    There are some suitable methods for the measurement of ultra-short solitary electromagnetic pulses that can be generated by high power pulsed generators. The measurement methods properties have to correspond to the fact ...
  • Problem of Bundled Two-Wire Cable of Tested Equipment in Emission Measurement 

    Bittera, M.; Smiesko, V.; Kovac, K. (Společnost pro radioelektronické inženýrství, 2006-12)
    Many factors that influence radiated emission measurement exist. Except of factors relative to measuring chain \"test site - antenna - receiver\" there are some factors caused by operating personnel like inappropriate ...
  • Comparative Performance Analysis of Three Algorithms for Principal Component Analysis 

    Landqvist, R.; Mohammed, R. (Společnost pro radioelektronické inženýrství, 2006-12)
    Principal Component Analysis (PCA) is an important concept in statistical signal processing. In this paper, we evaluate an on-line algorithm for PCA, which we denote as the Exact Eigendecomposition (EE) algorithm. The ...
  • Estimation of Radiated Fields of Small Horizontal Submodules Based on a Lumped-Element Model 

    Valek, M.; Leone, M. (Společnost pro radioelektronické inženýrství, 2006-12)
    A novel approach to the estimation of radiated electric field of small horizontal submodules is presented. The principle idea is to describe the radiating submodule-on-motherboard structure with a lumped-element equivalent ...
  • Automated Modeling of Microwave Structures by Enhanced Neural Networks 

    Smid, P.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2006-12)
    The paper describes the methodology of the automated creation of neural models of microwave structures. During the creation process, artificial neural networks are trained using the combination of the particle swarm ...
  • Multireflector Antennas - Cascaded Structures with Frequency Selective Surfaces 

    Hertl, I.; Raida, Zbyněk; Novacek, Z. (Společnost pro radioelektronické inženýrství, 2006-12)
    The problem of increasing the gain of directional multiband antennas is solved in the paper. A single-fed multiband (wideband) planar dipole is combined with cascaded (sandwiched) reflectors made of frequency selective ...
  • Modeling and Optimizing Antennas for Rotational Spectroscopy Applications 

    Lukes, Z.; Lacik, J.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2006-12)
    In the paper, dielectric and metallic lenses are modeled and optimized in order to enhance the gain of a horn antenna in the frequency range from 60 GHz to 100 GHz. Properties of designed lenses are compared and discussed. ...
  • Calculation and Modeling of EMI from Integrated Circuits inside High-Speed Network Devices 

    Goudos, S. K. (Společnost pro radioelektronické inženýrství, 2006-12)
    This work presents a numerical approach to the modeling of Electromagnetic Interference (EMI) from the emissions of ICs and PCBs inside rectangular metallic enclosures of network devices. The ICs are modeled as small ...