2002 IEEE International Symposium on Electromagnetic Compatibility
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Các bài báo tiêu biểu
Field coupling to nonuniform transmission lines with linear characteristic impedance
Tập 2 - Trang 621-626 vol.2
In this paper, plane wave field-coupling onto a nonuniform, lossless,
transmission line running over a ground plane is solved analytically by means of
a power series expansion in the longitudinal variable z. A linear variation of
the characteristic impedance versus z is assumed. It is shown via examples that
the obtained analytical results represent the limit solution of the approach
based on the ...
#Distributed parameter circuits #Impedance #Power transmission lines #Transmission line theory #Voltage #Electromagnetic compatibility #Conductors #Propagation losses #Electromagnetic coupling #Numerical simulation
A new method of emission measurement
Tập 2 - Trang 599-604 vol.2
According to the standards, emission measurements are carried out in the
frequency domain using a test receiver. In this paper the setup and algorithms
of a measuring system in the time domain is presented. The advantage of this
system is, that measurements can be done approximately 10 to 100 times faster.
The emphasis in this paper is set on algorithms to increase the measurement
accuracy of narr...
#Time measurement #Frequency measurement #Testing #Narrowband #Frequency domain analysis #Oscilloscopes #Antenna measurements #Pulse measurements #Discrete Fourier transforms #Voltage
Comparisons of planar versus spherical emission measurements for unintentional emitters
Tập 1 - Trang 189-194 vol.1
The emission patterns from electrically-large objects are complex and require
time-consuming spherical scans to determine the emission maximums. A planar cut
through the spherical pattern is a relatively easy measurement to make and
resembles the techniques used in present EMC emissions and immunity standards.
However, a planar cut is likely to miss the maximum emission from a test object.
This pa...
#Electromagnetic compatibility #Reverberation chamber #Frequency #Open area test sites #Power measurement #Immunity testing #Electromagnetic measurements #Electric variables measurement #NIST #Measurement standards
Alternatives to gaskets in shielding an enclosure
Tập 1 - Trang 205-209 vol.1
It is well known that a properly placed conductive gasket can complete an
enclosure to yield good shielding. But often there are reasons, e.g. control of
mechanical dimensions that this cannot be achieved. For these cases, one may
want to avoid using a gasket that requires contacts. This paper analyzes
alternatives to continuously contacting gaskets such as overlap structures,
overlapping structur...
#Gaskets #Conducting materials #Testing #Magnetic materials #Grounding #Antenna measurements #Magnetic shielding #Assembly #Frequency #Seals
Economic development initiative leads to building a $5 million EMC testing and training lab
Tập 1 - Trang 524-528 vol.1
The idea of developing a world-class EMC lab as part of an economic development
initiative in Nebraska took root in 1997 when a group of local companies put
their heads together with a large state university, a community college,
economic development lobbyists and state legislators. The state of Nebraska
funded the $5 million plan to put a lab in place and have it managed by an
independent nonprof...
#Electromagnetic compatibility #Economics #Industrial training #Consumer electronics #Electronic equipment testing #Educational institutions #Radio frequency #Test facilities #Intelligent sensors #Intelligent transportation systems
Estimating DC power bus noise
Tập 2 - Trang 1032-1036 vol.2
Simultaneous switching noise (SSN) resulting from IC devices can result in
significant power bus noise, as well as radiation problems. An approach for
estimating the power bus noise spectrum is presented in this paper. The power
bus noise caused by digital circuits injecting high-frequency noise onto the DC
buses feeding digital devices is calculated The transient current drawn by an IC
device is ...
#Integrated circuit noise #Voltage #Clocks #Capacitance #Power dissipation #Frequency #Impedance #Power system harmonics #Switches #Transient analysis
RF transmissivity measurements of a multilayered circular transparency to characterize attenuation behavior over a frequency range from 500 MHz to 18 GHz
Tập 1 - Trang 128-133 vol.1
Astronauts engaged in preparatory activities prior to Extravehicular Activity
(EVA) may spend one or more hours inside the middeck airlock that has been
partially evacuated to the vacuum of space. During this time, the astronauts may
wish to review and update non-critical mission information and EVA particulars
via a Radio Frequency Local Area Network (RF LAN) connection implemented on a
laptop co...
#Radio frequency #Attenuation measurement #Frequency measurement #Extraterrestrial measurements #Local area networks #Portable computers #Computer networks #Nonhomogeneous media #Downlink #Space shuttles
EMC in China
Tập 2 - Trang 782-787 vol.2
As the population grows and as living space becomes smaller, the importance of
electromagnetic compatibility (EMC) becomes more demanding. To assure the
compatibility of an electronic and/or electrical product, China has enforced EMC
regulations since 1999. The regulatory agency is the General Administration of
Quality Supervision, Inspection and Quarantine of the People's Republic of China
(AQSIQ...
#Electromagnetic compatibility #Certification #Testing #Inspection #Production facilities #Product safety #Performance evaluation #Electrical products #Communication channels #Communication system control
Coupling of the ground bounce noise to the signal trace with via transition in partitioned power bus of PCB
Tập 2 - Trang 733-736 vol.2
This paper investigates, in both time and frequency domains, the power plane
noise coupling to signal trace with via transition in multi-layer PCB. Power
plane noise or ground bounce noise will cause power plane resonance, and it also
couples noise to signal traces with via transition through power planes.
Separating power planes with slits is effective in reducing noise coupling at
high frequency...
#Circuit noise #Resonance #Coupling circuits #Bridge circuits #Testing #Frequency domain analysis #Current distribution #Finite difference methods #Joining processes #Frequency measurement
Enhanced immunity against crosstalk and EMI using GHz twisted differential line structure on PCB
Tập 2 - Trang 643-647 vol.2 - 2002
There is a growing tendency to adopt a differential signaling scheme for
critical signals. To support differential signaling, differential transmission
lines are required. The concept of twisted pair on the cable interconnection can
be readily applied to differential transmission lines on printed circuit boards
(PCBs), which enables enhanced immunity against crosstalk and radiated emission.
The ne...
#Crosstalk #Electromagnetic interference #Power transmission lines #Distributed parameter circuits #Transmission line measurements #Coplanar transmission lines #Transmission line theory #Conductors #Power cables #Integrated circuit interconnections