| Topic: |
Science > Physics |
| User: |
"G.A.Evans G4SDW" |
| Date: |
04 Apr 2007 03:55:36 AM |
| Object: |
Try acting out the part of the Aether? |
I'm trying to picture the E-M fields in the immediate
proximity of antennae, especially in the case of antennae
that are several wavelengths long.
For example, the calculation based on the Retarded Field
(The farm within which M3/CB Fools' Licensee fodder
is rotted down? :-) ) of an expanding wavefront comes
back, ISTR, to a single Marconi radiator.
However, in the case of a multi-wavelength antenna element,
there will be several current peaks interspersed by several
current nulls along the wire, suggesting that many different
and independent sites of activation exist. How could these
separate activation sites combine to form a single outgoing
wavefront when separate waves do not add together but
continue to travel separately?
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| User: "Jon Borg" |
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| Title: Re: Try acting out the part of the Aether? |
04 Apr 2007 12:50:07 PM |
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"G.A.Evans G4SDW" <me@privacy.net> wrote in message
news:euvp67$gr$1@news.datemas.de...
I'm trying to picture the E-M fields in the immediate
proximity of antennae, especially in the case of antennae
that are several wavelengths long.
For example, the calculation based on the Retarded Field
(The farm within which M3/CB Fools' Licensee fodder
is rotted down? :-) ) of an expanding wavefront comes
back, ISTR, to a single Marconi radiator.
However, in the case of a multi-wavelength antenna element,
there will be several current peaks interspersed by several
current nulls along the wire, suggesting that many different
and independent sites of activation exist. How could these
separate activation sites combine to form a single outgoing
wavefront when separate waves do not add together but
continue to travel separately?
The BBC used to have a representation with the words
"Nation Shall Speak Peace Unto Nation"
.
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| User: "Dead Paul" |
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| Title: Re: Try acting out the part of the Aether? |
05 Apr 2007 05:02:28 AM |
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On Wed, 04 Apr 2007 18:50:07 +0100, Jon Borg wrote:
"G.A.Evans G4SDW" <me@privacy.net> wrote in message
news:euvp67$gr$1@news.datemas.de...
I'm trying to picture the E-M fields in the immediate proximity of
antennae, especially in the case of antennae that are several
wavelengths long.
For example, the calculation based on the Retarded Field (The farm
within which M3/CB Fools' Licensee fodder is rotted down? :-) ) of an
expanding wavefront comes back, ISTR, to a single Marconi radiator.
However, in the case of a multi-wavelength antenna element, there will
be several current peaks interspersed by several current nulls along the
wire, suggesting that many different and independent sites of activation
exist. How could these separate activation sites combine to form a
single outgoing wavefront when separate waves do not add together but
continue to travel separately?
Seperate waves are perfectly capable of "adding" together (and subtracting).
--
___ _______ ___ ___ ___ __ ____
/ _ \/ __/ _ | / _ \ / _ \/ _ |/ / / / /
/ // / _// __ |/ // / / ___/ __ / /_/ / /__
/____/___/_/ |_/____/ /_/ /_/ |_\____/____/
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| User: "" |
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| Title: Re: Try acting out the part of the Aether? |
04 Apr 2007 07:05:36 PM |
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On Apr 4, 1:55 am, "G.A.Evans G4SDW" <m...@privacy.net> wrote:
I'm trying to picture the E-M fields in the immediate
proximity of antennae, especially in the case of antennae
that are several wavelengths long.
For example, the calculation based on the Retarded Field
(The farm within which M3/CB Fools' Licensee fodder
is rotted down? :-) ) of an expanding wavefront comes
back, ISTR, to a single Marconi radiator.
However, in the case of a multi-wavelength antenna element,
there will be several current peaks interspersed by several
current nulls along the wire, suggesting that many different
and independent sites of activation exist. How could these
separate activation sites combine to form a single outgoing
wavefront when separate waves do not add together but
continue to travel separately?
Same way as with multi-element antennas. Think Huygens.
Mark L. Fergerson
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