Re: measuring EM field

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>


>Would it be possible to map the EM field from a tesla system
>using interferrometry? (sp) Essentially a transmitter / receiver
>with a narrow focused RF signal of known frequency and amplitude
>aimed through the field you are inspecting.

         ??
         I can't see the E or M interacting with the 'probe'
         field?

         In any case, one can map, tho it takes time, by moving
         sensors thru the field?

         (indeed, for close in, want to have insulates/isolated
         remote reading sensors, especially if doing the map in
         'spark' mode, and up close.)

>Compare values to determine field intensity.  I had a lab

>where microwaves were focused, so I assume with a little

>math that a collimated microwave 'beam' would be possible.

         Nearly trivial.
         How does it interact with the other field?
         (usual inteferometry involves a common source,
         sent thru two different paths.  Here there are two
         sources: uWave and Tesla System, with no initial
         phase correlation?)

>however, I would expect that trying to use microwaves to

>map 200khz transmissions would be difficult to see any

>interferrence.

         I can't see that there would be any?

>Since the energy levels are a magnitude different.  And

>trying to focus 200khz or near that would be difficult,

>quarter wavelength being 1000ft or so. I would expect

>that attempting to focus that energy, the
>lens would need to be at least 1/4 wavelength.
         Usual way to pattern an antenna involves sense

         probes.  Or it used to....

         best
         dwp

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