[sci.electronics] Radio Wavicles and Modulation

logajan@ns.UUCP (John Logajan x3118) (09/09/88)

Okay, I can see RF photons traveling between transmitter and receiver,
and I can see the current flow into and out of the xmit and recv 
antennae.  I see that each photon is of specific frequency, but
I also see explanations that modulated RF is composed of multiple
frequencies.

So is the antenna producing vastly different frequency photons simultaneously?
How is this possible?  Wouldn't the current flow conditions in an antenna
only give rise to one frequency of photon at any given instant?

Actually, I am confused about the whole antenna/photon interface.  Do photons
come off at random times or is their departure correlated somehow to the
phase of antenna current -- sort of a burst mode (I doubt this.)

But maybe this is all too narrow of a view, perhaps there is a lumpiness in
the current flow in an antenna -- (with a corresponding lumpiness of voltage
distribution, I am not trying to overlook the electro part of the electro-
magnetic effect, just a form of shorthand notation.)  The lumpiness correlates
to the number of frequencies being transmitted simultaneously, and the photons
are being created by these local variations along with all the global
interactions.  What am I talking about?


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- John M. Logajan @ Network Systems; 7600 Boone Ave; Brooklyn Park, MN 55428 -
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