directional detection

[Funfinder]

To find an object from a distance different detection-methods are possible:

- focusing or amplifying a radiating power source
- measurement of different field strenghts
- calculation of reliable data

And in our LRL case:
- analyzing the field around the object


The most important question is:
what kind of directional antenna works the best and
what kind signal does it detect, electric or magnetic.

electric: natural or/and artifical
(static energy, ion-storms, lightning / EM waves of all kind)

magnetic: natural or/and artifical
(earth magnetic field, magnetite / the magnetic of EM waves)


An AM-ferrite-coil works the best if it is horizontally positioned
and at a 90° angle to the vertically transmitting AM-antenna.

An FM-antenna (the same with satellite signals) must have the
same polarisation.

The usual metal detectors coils works like an electromagnet-wire
concerning the concentrated magnetical strengh in the middle
which then radiates up and below. This is also directional -
directly in front of the coils center (or in the middle) the best detection is possible.



Now lets see what scientifcially knowledge you can contribute.


This is another try to get here in this forum some real advance
concerning "how LRL work".

But it needs scientifical thinking methods and not "dreaming"!



Logically seen a certain antenna-design also leads to the
received kind of signal. Per instance with a telescopic-antenna
AM reception will be difficult.

If you see at the drawing there are squares with A-E and 1-9.

Each of this areas must have a different field-strengh if LRL detection
works! Because the buried metal doesn't radiate by it self, as long as
it is not radio-active and even then the x-rays could get stopped by the ground.

btw. another directional detection method is with reflecting shields like
satellite-dishes or metal pipes. As example you can built directional
WiFi antennas with peanut-cans. But such antennas only work for
very small wave-lenghts, UHF and upwards.



Standing at one of such squares with the pistol-detector represents
a special "field-situation" but starting at each of these points
the detector needs to have the possibility to locate the next
square with the higher energy-level.
Therefore the directional antenna design is crucial important.

A pure static-energy-or EM-field-strenght meter without
a correct directional antenna design always can only detect
or measure the actual situation but without further coordinates.
Of course such a device would be completly useless for long range,
cause any direction could be the right one.


So at least two different coils are needed where the received
energy level between both of them gets compared. Comprende?


So now please take a look at the different antenna-designs and tell me
what kind of signals will be detected!