Switching power supply emission the electromagnetic waves

Whenever i turn on my computer, the radio is being jammed i known the reason is the switching power supply inside the computer when it work, it emission the electromagnetic waves My question is: - What is the electronic component of the power supply make the emission - If i use a power supply with higher capacity, is the emission decreased?

thanks a lot

by konkot
June 21, 2018

The emission is probably the caps being charged at turn-on and is being conducted into the mains lead. Try putting a large ferrite bead on the mains lead close to the supply. We used to have a similar problem on a mobile missile system. We parked it in a corner of a field under camouflage netting and asked a pilot to fly by and say if he noticed anything. To our amazement he instantly told us where it was. Simple, he said, my aircraft homed on it! All the TTL from supply to units radiated at clock frequency and odd harmonics. Red faces all round. mike.

by mikerogerswsm
June 21, 2018
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