Tom Donaly wrote:
you come up with the right answer, but is your
interpretation correct? Can you do the same thing in a
general sense? If there is no Z0 match between the two
transmission lines, does your method still work?
As a stand alone analysis, it yields two possible solutions
but the purpose of this discussion is not to come up with
a new stand alone method of analysis. The purpose is, given
a standard analysis, to add TRACKING OF THE ENERGY COMPONENTS
through an impedance discontinuity, something many people
believe to be impossible.
It wasn't designed to work as a stand alone analysis but
it does for Z0-matched systems, the most usual ham
configuration. However, an additional piece of information
is required in the general case to be able to tell which
voltage is leading and which is lagging.
(P.S. The method of using V and I and the junction of
the two xmission lines to find the forward and reverse
powers on a transmission line doesn't prove the powers exist.
Do you think the powers defined in HP App Note 95-1 exist?
Remember my one second long transmission line example where
the number of stored joules exactly equaled the number of joules
required by the forward wave and the reflected wave? If the
energy is not in those waves, where is it? Nobody has
provided any explaination of how standing waves can exist
without forward and reflected waves. Under "standing wave",
The IEEE Dictionary says: "A pure standing wave results
from the interference of two oppositely directed traveling
waves of the same frequency and amplitude." i.e. standing
waves are the result (effect), two oppositely directed
traveling waves are the *cause*. Most of my references
agree. The forward and reflected wave energy components
must exist as causes before standing waves can materialize
as an effect.
--
73, Cecil
http://www.qsl.net/w5dxp
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