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Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
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In Reply to: RFI shielding posted by jnorv on December 22, 2006 at 17:14:49:
1. This depends on the source of the RFI. Since RFI can be from many different things it will naturaly have many different profiles. Electrical length of the "recieving antenna" aka the node in your circuit that is picking up the RFI and the characteristic impedance of the node directly determine how much of a "problem" a particular RFI source will be in a circuit. The "electrical length" is proportianal to antenna gain and thus how much total energy is recieved. The node impedance will allow you to calculate what effect this particular quantity of energy will have in your situation. The problem is that the math to theoretically approach these numbers without having taken actual measurements can be quite the bear.2. Minimum distance would be infinite for no effect according to theory. You see, there is a distance term in the equation. However all hope is not lost since practically there exists a distance where the effect becomes negligible depending on application of course. If you don't have time to learn or do the math you kind of have to play with it to see what sounds good.
3. I think everything you ask can be understood by acquiring a firm understanding of Schroedingers equation, and esecially the subset which contain Maxwells equations. This could take several lifetimes to master though. Unless you have aspirations to become an EE or something it might just be easier to ask questions in a place like this. I'll warn you though, solving RFI problems can bring even the smartest EE's to their knees sometimes.
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Follow Ups
- Re: RFI shielding - Ugly 08:42:33 12/31/06 (0)
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