Conference Paper

Analysis of the CISPR 25 component test setup

ARC Seibersdorf Res. GmbH
DOI: 10.1109/ICSMC2.2003.1428236 Conference: Electromagnetic Compatibility, 2003. EMC '03. 2003 IEEE International Symposium on, Volume: 1
Source: IEEE Xplore


We analyze the wave propagation characteristic of the CISPR 25 radiated emission test setup with numerical simulations. Bad repeatability of the standardized ALSE validation procedure urged us to develop a new, more stable procedure. Our new validation procedure uses a small conical, dipole antenna instead of the test harness which improves the repeatability and avoids impedance problems of the artificial network and the noise source. Furthermore it allows precise measurements to investigate the influence of test bench dimensions and grounding. Results of these investigations are shown

43 Reads
  • Source
    • "One study [12] reported that the setup can resonate in the frequency range from 10 to 30 MHz, which is important for a setup with a monopole antenna; however, in this work, we have omitted the low-frequency range. Another study [13], however, reported that the setup (primarily the table) could also resonate in the frequency range from 45 to 70 MHz, depending on the table size and the grounding configuration. Table resonances could potentially result in strong standing wave patterns on the table surface. "
    [Show abstract] [Hide abstract]
    ABSTRACT: The CISPR-25 standard is used in the automotive industry to characterize the electromagnetic radiation of electronic components. The setup is comprised of an electronic device, a cable harness, a metallic table, and an antenna. Dimensions stretch from a couple of meters for the setup to fractions of a millimeter for printed circuit board features. Numerical prediction of radiated emissions (RE) is of great usefulness for prediction of potential electromagnetic compatibility nonconformities in the early design process, but extremely difficult to be done for this setup as a whole. In this paper, we demonstrate how RE can efficiently be computed based on a setup as commonly used to model conducted emissions only, i.e., electric control unit and harness on infinite-ground plane. Applying Huygens principle and using it to generate a fixed transfer function between a particularly chosen Huygens surface and the antenna, we arrive at a novel computing scheme for RE. The scheme is applied for the antenna model and antenna factor-based calculations and demonstrates agreement with measurements within 5 dB range.
    IEEE Transactions on Electromagnetic Compatibility 08/2014; 56(4):894-902. DOI:10.1109/TEMC.2013.2297303 · 1.30 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: EM noise emission in the radio bands from the communication harness of vehicle-mounted LAN is evaluated by performing an actual measurement test complying with CISPR25. This report provides a method used to define the specifications for the transmitter circuit and receiver circuit required to satisfy the AM noise limit in the test. The noise propagation is analyzed in common and differential modes and an inverse calculation is applied to obtain the specifications. Radio noise from the communication harness will be able to pass the test by designing the transmitter and receiver to meet the specifications developed using this method.
    Electromagnetic Compatibility, 2007. EMC 2007. IEEE International Symposium on; 08/2007
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper introduces a new artificial neural networks (ANNs)-based reverse-modeling approach for efficient electromagnetic compatibility (EMC) analysis of printed circuit boards (PCBs) and shielding enclosures. The proposed approach improves the accuracy of conventional or standard neural models by reversing the input-output variables in a systematic manner, while keeping the model structures simple relative to complex knowledge-based ANNs (e.g., KBNNs). The approach facilitates accurate and fast neural network modeling of realistic EMC scenarios where training data are expensive and sparse. To establish accuracy, efficiency, and feasibility of the proposed reverse-modeling approach, PCB structures such as perforated surface-mount shields and partially shielded PCB traces are treated as proof-of-concept examples. Although the modeling examples presented in the paper are based on training data from EM simulations, the approach is generic and hence valid for EMC modeling based on the measurement data. The approach is particularly useful in the electronic manufacturing industry where PCB layouts are frequently reused with minor modifications to the existing time-tested designs.
    IEEE Transactions on Electromagnetic Compatibility 04/2013; 55(2):385-394. DOI:10.1109/TEMC.2012.2214223 · 1.30 Impact Factor
Show more