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Old March 13th 07, 02:57 PM posted to sci.electronics.design,sci.electronics.basics,rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jun 2006
Posts: 440
Default VSWR doesn't matter?

"Roy Lewallen" wrote
The problem is that the idea of "reflected energy" turning the plates hot
is so easy to understand, that people aren't willing to abandon it simply
because it isn't true.

_____________

But reflected energy/power does exist.

For an easy example, such reflections are evident in the picture seen on an
analog TV receiver when the match between the transmit antenna and the
transmission connected to it is bad enough.

In analog TV transmit systems with a typical 500+ foot length transmission
line from the tx to the antenna, a 5% reflection from a far-end mismatch can
be quite visible, showing as a "ghost" image that is offset from the main
image as related to the round-trip propagation time of the transmission
line.

RF

 
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