Using TEM Cell Measurements to Estimate the Maximum Radiation From PCBs With Cables Due to Magnetic Field Coupling

Common-mode currents can be induced on cables attached to printed circuit boards (PCBs) due to electric and magnetic field coupling. This paper describes a technique for using transverse electromagnetic (TEM) cell measurements to obtain an effective common-mode voltage (or magnetic moment) that quan...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2008-05, Vol.50 (2), p.419-423
Main Authors: Shaowei Deng, Hubing, T.H., Beetner, D.G.
Format: Article
Language:English
Subjects:
Applied sciences
Boards
Cables
Couplings
Design. Technologies. Operation analysis. Testing
Electric potential
Electrical engineering. Electrical power engineering
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Inductance
Integrated circuits
Joining
Magnetic field coupling
Magnetic field measurement
Magnetic fields
Mathematical models
Microstrip
mutual inductance
radiated emissions
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
TEM cells
Transformers and inductors
Transmission electron microscopy
transverse electromagnetic (TEM) cell
Voltage
Voltage measurement
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Summary:Common-mode currents can be induced on cables attached to printed circuit boards (PCBs) due to electric and magnetic field coupling. This paper describes a technique for using transverse electromagnetic (TEM) cell measurements to obtain an effective common-mode voltage (or magnetic moment) that quantifies the ability of traces and integrated circuits on PCBs to drive common-mode currents onto cables due to magnetic field coupling. This equivalent common-mode voltage can be used to reduce the complexity of full-wave models that calculate the radiated emissions from a system containing the board. It can also be used without full-wave modeling to provide a relative indication of the likelihood that a particular board design will have unintentional radiated emissions problems due to magnetic field coupling.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2008.919026