EMI frequency, how it relates to wavelength – Electromagnetic Interference (EMI) Educational Series

EMI frequency and how it relates to wavelength – Electromagnetic(EMI) Educational Series

Now that we know EMI has multiple forms it’s time to get into some of the details. EMI frequency has a direct correlation to its wavelength but how so and what does that mean for you? Cory talks about wavelengths and offers a couple of solutions that may help you determine what EMI shielding protection you may need!

[Dialogue]
[Hey guys I'm Cory welcome to another episode of Zippertubing TV. Today we are going to talk about EMI shielding, what is it, how it works, and hopefully get you guys a better understanding about it.
Frequencies come very, very, low and frequencies come very, very, high. Now the lower the frequency is obviously the higher or the longer the wave is so we don't need a sensitive of EMI shielding for that, it's easier to shield.
For the very high frequencies we actually need something that's very solid so we don't actually have any leakage through that.
In terms of how we actually deal with electromagnetic interference we have quite a few number of coverings to do that. We actually have Knit Mesh, these work very well for lower frequencies and up into the mid-range frequency band.
Moving into a little bit mid-range and higher-range protection, we have fabrics and clothes. This one right here is actually a metalized cloth that we use, very flexible, very easy to wrap around wires, many applications, and it’ll actually take a lot of cycle so it won't crack or break.
And then for the very high frequencies we actually typically use solid metals like this foil here.
Now foils that we use, they have aluminum on one side and a Mylar coating on the back side.]