On 11/4/2014 12:48 PM, gareth wrote:
If short antennae radiate all the power that is fed to them, then why would
anyone use long antennae, because the first part of such an antenna, the
short
part, would radiate all the power, and then there'd be nothing left for the
extra bit, making up the rest of the long antenna, to do?

The answer is, of course, because it is more difficult to feed a short
antenna
because of its reactance.

So, whence does this reactance arise?

Simple.

It is the power that has NOT been all radiated by the short antenna arriving
back at
the feed point with an awkward phase relationship with the incident power.

What happens to that power that has not ALL been radiated when it arrives
back
at the feed point?

Simple.

It passes back into the matching network, which, together with the short
bit, form
the resonant artefact, where much of it disappears as heat in the matching
network
before being fed back to the short antenna to start all over again.

Now, Stephen Thomas Cole, that well-respected font of all technical
knowledge over
in uk.radio.amateur is saying that all you Yanks are a bunch of dopes if you
do not understand
the above, so take it up with him over there.

It is so amazing how a simple post of nonsense will make all the
gullible members of this group dance like puppets on a string.

--

Rick