Quote:
Originally Posted by FrancoItaly
The propagation of a magnetic field decreases with the inverse square of the distance while the electromagnetic radiation (not near field) decreases linearly with the inverse of the distance, and then goes much further than a magnetic field, at the same power.
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Alright, thanks, I think I see, so in order to get it working the way I thought it was working is basically a ground penetrating radar. Say you have a radar with medium penetration depth of 1meter, i.e. a frequency of around 300mhz. Rocks and most dielectric which is the ground would only reflect a tiny part of the radio waves. If say there is a piece of a good conductor at say 10cm depth it will reflect more than the insulators around it and thus a signature should be seen where the conductor hides.
I know these two problems however:
A-We could debunk this idea because the object itself needs to be at least 1 meter in size in order to reflect the radio energy. (But still a portion of the radio energy gets reflected even if the wavelength is bigger than the object).
B-We could also claim that even though small conductors could be distinguished and detected successfully among all the insulating earth media, we would be out of luck trying to figure out what kind of conductor it is. Why? because the
reflection ability (and thus what conductor it is) of the conductor would be NEAR IMPOSSIBLE to conclude from the overwhelming noise or ambient radio reflection of the insulating earth media and because a detected strong reflection on your receiver cant differentiate between a big conductor of poor relfectivity and conductivity or a small conductor with superior conductivity and reflectivity.
Am I thinking in the right direction?
All ideas thoughts welcome. I am just seeing if I can find any possibility through sound established principles. I am aware of wallet hunters.