I have to say that I am also lacking in theory, but the tests carried
out on airborne and core coils have been successful and are working.
The
most relevant loop antenna has been an octagon-shaped loop, formed by
22mm diameter copper pipe of 1mm thickness, equivalent to 66mm square,
forming a surface of 1m square. As seen in the attached diagram, I put
in resonance by LC series (38400Hz) giving close to 100A, which in turn
gives a magnetic moment of 100A per square meter. I verify that in the
center of the octagon I am condensing enough the magnetic flux, knowing
that it is very difficult to saturate the air. In summer I get to
notice heating of the pipe. If I bring a euro coin to the pipe, it
heats up and diverts the antenna's resonance.
Then
I was forced to reduce the volume of the antenna for comfortable use in
underground cavities. I had to resort to using cores to keep an
effective area as large as possible. I tried what I had at hand, the
coils of the TV deflection coils and I observed good operation, I also
circulated a large amperage for it, giving rise to the development of a
new transmitter for radiolocation, it is the Summer, published in the
CREG JOURNAL nº99 " of the BCRA.
I
have always wanted to use the power through low voltage and a lot of
amperage, which will translate into great magnetic moment. It is
necessary to use few loops in the loop, with a large section of the
conductor and a high magnetic permeability core to increase the
effective area. I also intend to minimize the tensions in the resonant
circuit, there are partners who can suffer electrocution risk, since
the equipment works at one hundred percent humidity and other times
submerged.
So
far I have changed the cores of the air antennas for ferrites, and now
I would like to use mu-metal that has very high magnetic permeability.
I see hard to get that material. I have seen that they manufacture rods
of several cm in diameter. It would be interesting to contact the
manufacturer and ask for samples, if someone sees it feasible to say
something about it.
I
have always worked in the near field for the use of radiolocation, and
speaking with Luis EA5DOM, we discussed the effectiveness of using the
electric field or the magnetic field with air, knowing that it is the
magnetic that crosses the rocky pack more easily . I appreciate the
comments on this part by this group.
Regards
Juan Leandro