PCB-Level EMC, part IV

Emissions, layout & stackup

from 8:15am Welcome Coffee

8:45am Room open

9:00am Common mode radiation

  • Causes of common-mode radiation
  • Radiation from planes
  • Radiation from cables
  • Principles of CM-filters

10:30am Coffee break

10:45am Precompliance measurement of radiated emissions

  • Obtaining meaningful data
  • GHz-TEM-cell
  • RF-current-probe

 Near-field probing

  • Near-field scanner
  • Intuitive approach: H-field probe

12:30amLunch

01:30pmLayer-stackup for multilayers

  • Current paths in multilayers
    • Keeping an eye on plane-currents
  • Basic physical requirement
  • Defining the correct dielectric height
  • Routing of high-speed signals
  • Additional aspects in multilayers
  • Vias:
    • Correct placement
    • Impedance
    • Filter-effects

03:00pm Coffee break

03:15pm ...continued

  • Defining layer-modules
    • Pros and cons
  • Layer-stackup & X-Talk
  • Mixed-signal designs: special aspects
  • Correct stackups for 2 to 10 layers
  • Adjusting trace-width

~ 05:00pm Discussion