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Old February 25th 04, 11:48 PM
aunwin
 
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Great, now to the issue.
\
How much power does the antenna pick up compared to the power enclosed
within the 2.4 Khz frequency spread that is considered useful ? Or can we
say how much energy is dumped to ground by a bandpass filter (plus insertion
losses). I know it may be absolutely quiet outside the bandwidth of choice
but I assume you get my drift with respect to efficiency of a simple dipole
to a radiator of high Q.
Regards
Art
"Dave Shrader" wrote in message
news:he8%b.120870$jk2.515312@attbi_s53...
Dan Richardson wrote:

Let me try this one more time. You had posted earlier and I commented
on this:

"A receiving antenna must be resonant to enable full acceptance of
available energy, and it must be matched to avoid re-radiation of more
than 50% of the energy it is able to grab."

I commented on the first portion of your statement (above). My only
point is that it makes no difference if an antenna's is resonate or
not in determining how much energy it grabs.

That's it, nothing more.

73
Danny, K6MHE

SNIP

The effective aperture is the effective aperture is the effective
aperture ...

The antenna intercepts ALL the EM energy within it's effective aperture.

You, the listener, may be interested in only 2.8 KHz of that energy. :-)





 
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