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June 28, 2014

Mtg: Gigahertz Two-Band Common-Mode Filters for 10-Gbit/s Differential Signal Lines

by @ 10:20 am. Filed under ALL, Communications, Electronics Design
 

TUESDAY October 14, 2014
SCV Electromagnetic Compatability Chapter
– suppression, band gap, PCB integration …
Speaker: Miroslav Pajovic, EMC Design and RF/Antenna Consulting Engineer
Time: Networking and light dinner at 5:30 PM; presentation at 6:30 PM
Cost: $5 donation for food
Place: Agilent Technologies, Bldg. 5L, 5301 Stevens Creek Blvd, Santa Clara
RSVP: not required
Web: www.ewh.ieee.org/r6/scv/emc

In addition to the desired differential signals, the undesired and EMI harmful common-mode noise may propagate along differential signal lines.  Conventional common-mode filters such as ferrite chokes – which work well in lower frequencies below 1 GHz â?? have limited effectiveness in the gigahertz frequency range.  To suppress critical common-mode at gigahertz frequencies without degrading quality of the differential signals, the gigahertz common-mode filter structure is proposed herein.  This design is directed to a compact-size electromagnetic band gap (EBG) structure suitable for placement in multilayer PCBs, individual IC chip packages, or in optical transceiver modules.  The filter provides common-mode suppression at 10-Gbit/s differential signal lines at the frequencies 10.3125 GHz and 20.625 GHz, where common-mode noise can be highly problematic.

20141014scv

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