2007 ieee international symposium on electromagnetic compatibility

EMC <strong>2007</strong> ADVANCE PROGRAM11tion data was used to compare before and after measurements of thechamber surfaces. A free space reference provided improved datafidelity. After the update a standard IEC 61000-4-3(A1) test volumeuniformity assessment was performed. These results show that theRF absorber retro-fit resulted in improved radiated emissions andimmunity performance.Rod Antenna Interaction Inside a Shielded ChamberDennis Swanson, Lockheed Martin MS2This paper investigates the interaction of a rod antenna with the testsetup in which it is installed. Historically, the rod antenna has beenwidely used for radiated emissions testing. Anecdotal rumors exist tohint that there can be considerable variation in measurements takenwith a rod antenna. To investigate these alleged variations, simulationsoftware was used to model rod antenna test setups. The softwarecalculated the coupled voltage received by the rod antenna froma simulated wire harness. Calculations were compiled as a functionof the shield room size and the size of the test bench. Simulationsalso included comparisons to outdoor test sites. The results of thisanalysis should be considered when revising standards that employthe use of a rod antenna (e.g. CISPR 25, MIL-STD-461E, etc.).Free Space Antenna Factors Through the Use of Time-Domain Signal ProcessingDennis Camell; Robert Johnk; David Novotny; and Chriss Grosvenor, —National Institute of Standards and Technology (NIST)This paper demonstrates the usefulness of time domain processing todetermine free-space antenna factors (FSAF) for EMC antennas.Procedures are explained and data is provided from 30 MHz to 9GHz. We investigate time gating of dense frequency packed insertionloss data obtained with an ultra-wideband measurement system.These results show the advantage of time-domain gating to providereliable results for free space antenna factors of EMC antennas.EMC MANAGEMENTThe Role of EMC Standards in Product QualityWayne A. Hunter, Agilent Technologies, Inc.This paper provides the reader with a representation of how the mostcommon <strong>international</strong> EMC standards created by the IEC for commercialelectronic equipment are created, why it is important to usestandards, and how these standards can actually increase the qualityof the product. The paper attempts to also provide the reader with abackground for the electromagnetic conditions the standards attemptto simulate. It attempts to provide the reader with some reference towhat is mandatory, what is optional, and suggested levels for a productbased upon the intended operating environment. The paper willmainly reference <strong>international</strong> standards created by the IEC andCISPR for simplicity. Since national or local standards may be different,the paper is a good guidance, but not a substitute for theapplication of due diligence.A Hierarchical Model for Prescribing EMC Design Targets tothe Components of a SystemHirayr Kudyan, Alcatel-LucentComponents of a system (i.e., units, shelves, or modules) cannotmeaningfully be tested for system-level emissions compliance bythemselves. The lack of EMC design objectives for emissions at thesub-system level makes it ambiguous for component designers to©<strong>2007</strong> IEEE www.emc<strong>2007</strong>.org