Parameters Extraction of Ferrite EMI Suppressors for PCB Applications Using Microstrip Test Fixture

The goal of this work was to investigate the behavior of a ferrite electromagnetic interference (EMI) suppressor when placed in a real surrounding. Electrical parameter measurements of the same EMI suppressor can differ for different combination of instruments and test fixtures. For that reason spec...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2010-06, Vol.46 (6), p.1370-1373
Main Authors: Menicanin, Aleksandar B., Damnjanovic, Mirjana S., Zivanov, Ljiljana D.
Format: Article
Language:English
Subjects:
Circuit boards
Circuit testing
Cross-disciplinary physics: materials science
rheology
Electric variables measurement
Electromagnetic interference
Electromagnetic interference (EMI)
Electromagnetic measurements
Exact sciences and technology
Extraction
Ferrite
ferrite devices
Ferrites
Fixtures
frequency-domain analysis
Instruments
Magnetism
Materials science
Mathematical models
Microstrip
Multilayers
Other topics in materials science
Parameter extraction
Physics
Printed circuit boards
Printed circuits
scattering parameters
Semiconductor device measurement
Suppressors
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Summary:The goal of this work was to investigate the behavior of a ferrite electromagnetic interference (EMI) suppressor when placed in a real surrounding. Electrical parameter measurements of the same EMI suppressor can differ for different combination of instruments and test fixtures. For that reason specially designed microstrip test fixtures are developed for the vector network analyzer (VNA) measurements. This paper describes the measurement technique, parameters extraction, and characterization of ferrite EMI suppressors for printed circuit board (PCB) applications. Two commercially available components, multilayer chip SMD inductors in a ferrite body, are measured and characterized using a VNA E5071B and developed adaptation test fixture on PCB board. These measurements describe intrinsic and extrinsic parameters of the components and their behavior. If the components are mounted on the PCB, i.e., in a real environment, then the two-port EMI suppressor model with extrinsic parameters has to be used at RF frequencies. The comparison of measured and datasheet values is further presented.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2010.2040810