Quote:
Originally Posted by ionios
if we like to have both air and ground what we do?
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Nothing special, cause VLF wave penetrate very deep in ground also (without ground plane part of antenna).
You need to place your transmitter with coil antenna in air near to soil surface of about 10 meters or more from detecting place.
For better detecting you can try from different positions and different orientation of coil antenna in air (vertical, horizontal, in detecting direction, etc.).