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EMC Training Course

July 3, 2009 by Tom O'Brien

Getting Started
The dB
dBuV/m to dBm

Coupling Systems (Capacitive and Inductive)
Capacitance between wires
Capacitive crosstalk between wires with demonstration
Demonstration
Effect of shielding
Self and mutual Inductance
Inductance crosstalk between wires with demonstration
Demonstration

Components in everyday use and their EMC profile
Resistor
Capacitor
Inductor
Wire
Ferrite

Bypass Capacitor
Bulk Capacitor
Small Capacitor
Demonstration

Radiation from Antennae

A plane wave
Loop antenna
Rod antenna
Near and the far field
Power and Electric field
Anechoic Chamber versus Open Air Test Site
Demonstration

Conducted Emissions

The set up
Differential mode current
Common mode current
Demonstration
Designing of PCB Boards

Track layout
Different layers
Component placement

Shielding

Reflections from conductive surfaces
Absorptions in conductors
Shielding technologies
Effect of apertures

During the course a number of experiments will be run to bring home the concepts just discussed.

1) Broadband/narrowband signal

2) Capacitive coupling

3) Inductive coupling

4) Differential mode and common mode currents.

5) Harmonics form square waves.

6) Bypass capacitor

7) Inductance in leads and their effects on supply rails.

8) Shielding materials.