2002 IEEE International Symposium on Electromagnetic Compatibility

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Uncertainty in radiated tests due to source polarization
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 506-508 vol.1
E.R. Heise, R.E.W. Heise
Radiated uncertainty calculations are based on instrumentation and transducer factors for testing at a site that conforms to normalized site attenuation criteria, such as ANSI C63.4. The criterion is obtained using linear polarized antennas to measure like polarized sources. Equipment testing or troubleshooting generally conforms to this model, but some very substantial vertical signals can be gen...... hiện toàn bộ
#Uncertainty #Testing #Polarization #Dipole antennas #Frequency #Receiving antennas #Broadband antennas #Attenuators #Mutual coupling #Signal processing
Maintain and validate radiated emissions measurements in a 10 meter semi-anechoic chamber
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 492-497 vol.1
P. Rose, M. Luvara
In this paper, the authors describe the methods and procedures used to maintain and validate a 10 meter semi-anechoic chamber used for radiated emissions measurements. Included are a list of monthly, semi-annual, annual, and as needed checks and an approach for measurement software/hardware validation. Finally, they discuss a method by which to verify that a semi-anechoic chamber's measurement sys...... hiện toàn bộ
#Antenna measurements #Cables #Gain measurement #Connectors #Inspection #Hardware #Performance evaluation #Receiving antennas #Qualifications #Brushes
Description of magnetic field distributions caused by single-pole encapsulated switchgear
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 440-445 vol.1
B.W. Jaekel
Power frequency magnetic fields produced by switchgear might interfere with sensitive equipment or might even conflict with exposure limits for people. In order to prevent possible influences the knowledge of the magnetic field levels at locations under concern is necessary. Though the magnetic field distributions of switchgear installations are mainly determined by the physical arrangement of the...... hiện toàn bộ
#Magnetic fields #Switchgear #Magnetic field measurement #Electromagnetic transients #Frequency #Bars #Moment methods #Switching circuits #Automation #Encapsulation
Dithered timing spread spectrum clock generation for reduction of electromagnetic radiated emission from high-speed digital system
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 413-418 vol.1 - 2002
Jonghoon Kim, Joungho Kim, Piljung Jun
In modern digital systems, the most amount of radiation from the system is caused by the high-speed digital clock signal. As a method to reduce the electromagnetic radiation from the system clock, a spread spectrum clock technique that modulates the system clock frequency had been introduced. The conventional spread spectrum clock is realized by controlling the period or the frequency using a phas...... hiện toàn bộ
#Timing #Spread spectrum communication #Clocks #Electromagnetic radiation #Digital systems #Frequency #Phase locked loops #Jitter #Attenuation #Delay
Radiated emission from a multilayer PCB with traces placed between power/ground planes
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 253-257 vol.1
T. Harada, H. Sasaki, T. Kuriyama
Mechanism of radiated emission induced by traces placed between power/ground planes and the radiation reduction technique are described. Those internal traces can cause voltage bounce between the power/ground planes and this bounce results in high-level radiated emissions at resonant frequencies. Radiated emission characteristics depend on the trace location in the board; radiation level is high w...... hiện toàn bộ
#Nonhomogeneous media #Frequency #Voltage #Power distribution #Printed circuits #Spectral analysis #Signal generators #Antenna measurements #Coaxial cables #Electromagnetic compatibility
The influence of the instruction codes on radiated near-magnetic-fields $a case study on A5000
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 167-172 vol.1
A. Mutoh, S. Nitta, E. Takamura, T. Tsukagoshi
It has been said that the radiated electromagnetic emission (EMI) spectra from the computer change with the kind of the program executed on the computer. In this study, as a first step to investigate the influence of program on EM, the influence of instruction codes executed on a CPU on radiated near-magnetic-field is clarified by experiments and investigation on the timing chart of a CPU. It is c...... hiện toàn bộ
#Computer aided software engineering #Clocks #Electromagnetic interference #Antenna measurements #Computer aided instruction #Frequency #Timing #Measurement standards #Microcomputers #Electromagnetic radiation
Considerations for quadrature receiver calibration using frequency weighted least squares FIR filter design
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 123-127 vol.1
R.A. Green, D.C. Farden, Xiao Yan
When designing a filter for use in mitigating electromagnetic interference (EMI), one of the primary considerations is that the actual filter response conforms closely to the desired response. For many applications, finite impulse response (FIR) filters are used to provide the desired response. One particularly useful and flexible FIR filter design technique is frequency weighted least squares (FW...... hiện toàn bộ
#Calibration #Least squares methods #Finite impulse response filter #Frequency response #Neodymium #Interference #Data processing #Nonlinear filters
Influence of the technology on the destruction effects of semiconductors by impact of EMP and UWB pulses
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 87-92 vol.1
M. Camp, H. Garbe, D. Nitsch
In this paper the influence of TTL- and CMOS-technology on the destruction effects of semiconductors by impact of EMP and UWB pulses is determined. Different logic devices like NANDs and inverters were exposed to high amplitude transient pulses.
#EMP radiation effects #Electric breakdown #Pulse measurements #Electromagnetic waveguides #CMOS technology #Electric variables measurement #Electromagnetic transients #Electromagnetic fields #Electromagnetic measurements #Modems
An imaging system for EM emitting sources with time-domain sampling
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang 61-64 vol.1
H. Hirayama, Y. Kami
In this paper, we propose a passive imaging system for noise source identification of digital circuit using time-domain waveform sampling. The fundamental concepts are based on optics theory. A waveform of a diffracted field on an entrance pupil is acquired by a digital oscilloscope. The phase distributions on the entrance pupil for each frequency are calculated by using Fourier transformation of ...... hiện toàn bộ
#Time domain analysis #Sampling methods #Optical imaging #Optical noise #Frequency #Circuit noise #Digital circuits #Image sampling #Stimulated emission #Optical diffraction
2002 IEEE International Symposium On Electromagnetic Compatibility [front matter]
2002 IEEE International Symposium on Electromagnetic Compatibility - Tập 1 - Trang i-xiv - 2002
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the ori...... hiện toàn bộ
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