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Fiber Weave Effect: Modeling, measurements, challenges and its impact on differential insertion loss for weak and strong-coupled differential transmission lines

Amendra Koul (Technical Leader - Signal Integrity, Cisco systems inc)

Kartheek Nalla (Signal Integrity Engineer, Cisco Systems Inc.)

David Nozadze (Signal Integrity Intern, Cisco Systems Inc.)

Mike Sapozhnikov (Sr. Signal Integrity Manager, Cisco Systems Inc.)

Yaochao Yang (Principal Engineer/Technical Director , Cisco Systems Inc.)

Location: Ballroom B

Date: Wednesday, January 31

Time: 9:00am - 9:45am

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

Track: 05. Advances in Materials and Processing for PCBs, Modules, and Packages

Audience Level: All

Format: 45-Minute Technical Session

Vault Recording: TBD

Audience Level: All

We propose a methodology to model fiber weave based on cross-section to determine worst case skew impact for a particular glass style on defined differential pair pitch to make a behavioral glass-weave based model. Using effective test coupon design, we collect measured glass data and study fiber-weave's impact on differential insertion loss and other s-parameters in the case of weak and strong-coupled transmission lines. This paper would also describe challenges that designer might face while trying to design a clean high-speed channel link.


Fiber weave skew modeling and measurements. Skew impact on differential insertion loss in strong/weak coupled differential transmission lines. Skew impact on eye performance. Challenges faced when designing with glass weave skew impact.