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Fast Resonance Reduction Using Eigenmode Solution and Custom Metrics

Davi Correia (Signal Integrity Engineer, Carlisle IT)

Stephan Baker (Electrical Consulting Engineer, Simutech)

Alexandra Haser (Senior Industry Standards Engineer, Molex)

Michael Rowlands (Signal Integrity Engineer, IO Connector Group, Amphenol)

Location: Ballroom A

Date: Wednesday, January 31

Time: 2:50pm - 3:30pm

Pass Type: 2-Day Pass, All Access Pass, Alumni All Access Pass - Get your pass now!

Track: 14. Modeling and Analysis of Interconnects

Audience Level: Advanced

Format: 40-Minute Technical Session

Vault Recording: TBD

Audience Level: Advanced

The presence of resonant frequencies in electromechanical devices is one of the primary issues that inhibits the quality of high-speed data transmission. Signal integrity engineers typically spend a significant portion of the design process on finding and suppressing resonances; this is primarily due to the iterative nature and computational expense of using conventional frequency-domain solvers. This paper explores an alternative design approach to quickly identifying resonances in multi-ground connector and circuit board structures. The method uses custom metrics and eigenmodes to discern if a particular mode is excited; several examples are also presented.


Combine custom metrics and eigenmode analysis to understand and address resonances in high-speed interconnect designs. Use a fast, systematic method to reduce resonances, rather than an iterative, trial-and-error approach. Address root-cause problems from a physical point-of-view, resulting in more robust designs.

Intended Audience

3D field solver experience (HFSS, CST), signal integrity and channel analysis skills