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High Speed unshielded differential cables will often have unwanted, but unavoidable, common mode energy in the low GHz frequency range. This work examines a coating of lossy material on the cables and quantifies the amount of loss, and the frequency range of the loss using reverberation chamber measurements.
The use of so-called differential signaling for high speed signals has become very common in today's high speed system designs. While this signal strategy allows better data quality and signal integrity, there are some significant EMC and signal integrity issues that are not readily apparent. This paper demonstrates that a significant amount of common-mode current can be created when the two legs...
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