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Old June 16th 04, 06:04 PM
Cecil Moore
 
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Richard Harrison wrote:
The shorted 1/4-wave stub exhibits an open circuit at its mouth and
accepts only enough current to supply its losss which are none in the
perfect stub.


Richard, I think you would be surprised if you measured the RF current
through the short at the shorted end. It will be the in-phase sum of
the forward current and reflected current and is quite high. I once
melted the insulation at the end of a shorted 1/4WL piece of RG8X.
The heat came from high I^2*R losses at the short.

The SWR inside a perfect stub is infinite.
--
73, Cecil http://www.qsl.net/w5dxp



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