EEVblog #1176 - 2 Layer vs 4 Layer PCB EMC TESTED!

What difference does a 4 layer PCB make to EMC radiated emissions compared to an identical 2 layer PCB? And why? Dave does H-Field near-field probe testing on two otherwise identical PCB's. Electromagnetic waves and the difference between near field and far field, and H-Field and E-field probes and wave impedance is also explained.