[time-nuts] Orbital time-delayed angular momentum phasing....???!!

[Michael Baker]

Timenutters--

Along the lines of splitting time into small increments, there
is an interesting article in the May 2012 issue of the
IEEE Spectrum Journal.

It describes experiments with what I am calling "cork-screw
time-shift phasing modulation" or "orbital time-delayed angular
momentum phasing" for lack of a better description of the
process.  This is not the same as circular-polarization of a
radiated signal.

Visualize a 4-ft dia parabolic reflector which has been cut
(sliced) in a straight line from any arbitrary point on its outer
edge to its center.    Then, at the outer lip of the reflector
surface, pull one side of the cut about a foot forward of the
other side of the cut.  The separation is greatest at the edge
of the dish, gradually becoming less and less as the cut
approaches the center of the dish.

The concept is that RF energy from the feed progressively
strikes different areas of the dish slightly ahead (time-wise)
from RF energy that strikes other parts of the dish.   Because
the surface of the dish resembles a cork-screw the signal
from the dish has elements that are time-delayed with
respect to other parts.   Accordingly, data elements can be
incorporated into the signal which have sightly different
time-delay angular momentum properties.  Again, the folks
working on this insist that this is not the same as circular
polarity of the radiated signal such as is obtained with a
helix antenna.

At the receive end, the process is reversed, producing a
signal which when demodulated can contain extra levels
of data modulation superimposed on it.

The article points out that there are skeptics of the process
who say that this same modulation procedure can be done
with other methods although the modulation and demodulation
process would be much more complex.

The orbital angular momentum of photons in the optical
realm has been extensively studied, although applying these
principles to RF is something new.

Mike Baker
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