[SI-LIST] Re: Mode conversion question
- From: "Kevin G. Rhoads" <kgrhoads@xxxxxxxxxxxx>
- To: Doug Brooks <dbrooks9@xxxxxxxxxxxxxxx>
- Date: Tue, 01 Nov 2011 18:09:11 -0400
> Thus mode conversion is a mathematical (and physical) model that allows us
>to deal with the analysis, rather than an actual physical phenomenon.
Yes and no. The case you've described is modelling issue, rather than physical.
And some forms of that could be described as "mode conversion", but that is
not what the term usually is used to refer to.
Consider, a transmission line or waveguide supports various propagating modes.
If
there is a disruption in the physical structure, then the modes supported in the
disrupted section can differ. The original modes each excite one OR MORE of the
disrupted section's modes, when then can become differing modes on the lines on
either side of the disruption. That is a physical phenomenon, and that is what
is more commonly described as mode conversion. Power being transferred into
propagating
modes that were previously unpowered is the typical form seen.
HTH
Kevin
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