NDLI: Time and frequency domain analysis for right angle corners on printed circuit board traces

Content Provider	IEEE Xplore Digital Library
Author	Montrose, M.I.
Copyright Year	1998
Description	Author affiliation: Montrose Compliance Services, Santa Clara, CA, USA (Montrose, M.I.)
Abstract	For years, rules of thumb were provided in published literature stating 90 degree corners create radiated EMI. In addition, concerns exists regarding signal integrity for high-speed digital signals traveling down a printed circuit board (PCB) trace. High-speed is defined in this paper as a signal with an edge rate much faster than one nanosecond (1 ns), generally in the mid-to-low picosecond range and greater than 100 MHz. These rules of thumb are stated without justification if they are necessary or whether EMI compliance is jeopardized. These concerns are based on word-of-mouth, theoretical models or the mathematics of Maxwell's equations. Computer simulation of PCB traces with various configurations have been presented in published literature based on models that in almost every case does not represent real-life or actual electrical parameters found in PCB designs. These parameters include stackup assignments, creation of common-mode energy, component driver models, distance spacing of a trace referenced to an RF return path, or incorporation within an enclosure. Research generally considers only the time or frequency domain, not both. In order to study how routed traces perform within a PCB, consideration is given to investigating both the time and frequency domain of a circuit.
Starting Page	551
Ending Page	556
File Size	642917
Page Count	6
File Format	PDF
ISBN	0780350154
DOI	10.1109/ISEMC.1998.750154
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-08-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency domain analysis Printed circuits Impedance Radio frequency Thumb Maxwell equations Transmission line theory Distributed parameter circuits Electromagnetic scattering Dielectric losses
Content Type	Text
Resource Type	Article

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