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Here is an interesting
cameo. Figures 35 and 36
shows what happens to the even and odd mode when the front end of the
passive line is shorted to ground. This means that at the start, the signal
on the passive line must have zero voltage, as we see. The two modes, even
and odd, are forced to have the same (equal and opposite) voltage. Further
down the line, travelling at different velocities, they separate out, and
are equal.
The
Nature of Space (The first March 2010 advance.)
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The Transformer
That is
not the end of the significance of Figures 35 and 36 . When the
passive line is shorted to ground, or to its mirror, as in Figures 35 and 36 , the
situation at the third trace is the same as that for a one turn transformer
at the point where the wires to the primary are connected. See the
second figure ; “Single Turn Transformer”. The active line is the
primary, and the shorted passive line is the secondary. Here we get an
indication of the way in which, under “Faraday’s discovery of
electromagnetic induction”, energy current transfers from the transformer
primary to the transformer secondary. Note that in the third trace of
Figure 36, where there is a short, there is, as we expect, no sign of any
energy within the secondary, or passive line. However, further on, in the
second and first traces, because of their different velocities, we see the
two quantities of energy separating out and no longer hiding each other.
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Crosstalk (Noise) in Digital Systems
Pages
1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , some of which is in two
of my books. The argument starts at page 30 of one book , and at page 4 of the other book
, continuing on page
55 . Here in
figure 9.2 we see “a very narrow pulse introduced at the front end of the
active line. If there were no parallel passive line nearby, this pulse
would travel down the active line (at the speed of light for the
dielectric) more or less unchanged,” in a TEM mode. “However, as the other
two traces show, the presence of the passive line caused the original
narrow pulse to break up into two similar pulses.”
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