Wideband frequency-domain characterization of FR-4 and time-domain causality

FR-4 is one of the most widely used dielectric substrates in the fabrication of printed circuits for fast digital devices. This material exhibits substantial losses and the loss tangent is practically constant over a wide band of frequencies. This paper presents measured data for the complex permitt...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2001-11, Vol.43 (4), p.662-667
Main Authors: Djordjevic, A. R., Biljic, R. M., Likar-Smiljanic, V. D., Sarkar, T. K.
Format: Article
Language:English
Subjects:
Applied sciences
Approximation
Complex permittivity
Electromagnetic compatibility
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Exact solutions
Information, signal and communications theory
Mathematical analysis
Microwaves
Printed circuit fabrication
Printed circuits
Telecommunications and information theory
Wideband
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Summary:FR-4 is one of the most widely used dielectric substrates in the fabrication of printed circuits for fast digital devices. This material exhibits substantial losses and the loss tangent is practically constant over a wide band of frequencies. This paper presents measured data for the complex permittivity of this material from power frequencies up to the microwave region. In addition it gives simple closed-form expressions that approximate the measured data and provide a causal response in the time domain.
ISSN:0018-9375
1558-187X
DOI:10.1109/15.974647