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.
The PCB layout is then examined to look at loop area and by-passing and what effect this has.
Forum: !/
Designing the 4 layer board:
Bypass capacitor Visualised:
PCB Power Plan Capacitance:
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Теги: eevblog,video,h-field,e-field,b-field,near field,far field,near field emc,emc testing,emc compliance,emc pre-compliance,pcb layout,ground plane,power plane,inductance,loop area,pcb loop area,pcb,pcb design,how to,pcb tutorial,antenna
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2 months ago 00:16:24 1
EEVblog #1273 - EMC Near Field vs Far Field Explained