Hello,
I am designing an application in which a very thin target needs to be detected. Is it possible to detect something that is thinner than the skin depth with a high resolution if the metal is very close to the coil (a few mm)?
The skin depth:
for my parameters:
w=2*pi*f=2*pi*5000000
µr=1.000022
rho=2.6548
I get a skin depth of about 36µm. Can my conductive target still be thinner than that?