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Old April 11th 07, 03:42 PM posted to rec.radio.amateur.antenna
Yuri Blanarovich Yuri Blanarovich is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 170
Default Constructive interference in radiowave propagation


"Cecil Moore" wrote in message
t...
Owen Duffy wrote:
One can only guess at the motivation for all the obfuscation that we see
here.


Here's a list of questions for you and everyone else.

1. Is the distributed network model valid? If not,
please explain where it is invalid.

2. Is the wave reflection model valid? If not,
please explain where it is invalid.

3. Is the base of knowledge and laws of physics
from the field of optics valid? If not, please
explain where they are invalid.

4. Is an S-Parameter analysis valid? If not,
please explain where it is invalid.

5. Does the principle of superposition give us
permission to analyze the forward wave and
reflected wave separately and then superpose
the results? If not, please explain why not.

6. Does the conservation of energy principle
work for forward and reflected waves? If not,
why not?

7. Does the label of "obfuscation" really apply
to items 1-6?

8. Do you and other gurus already know everything
there is to know or does every person have holes
in his/her limited knowledge base?
--
73, Cecil, w5dxp.com


I have no beef with above, and would like to thank you and Walt for
persisting in defending, explaining and trying to correct some "wrongos" out
there.

Seems that the unbelievers are in the same camp with those who could not
digest the behavior of loading coils in standing wave antenna circuit. Seems
it would be much nicer if the discussions were more in the line "oh, yea,
why?" rather than "you fool, you know notin'" ...or something like that.

I have experienced special case of interference between two antennas, fed
from the same transmitter and separate amplifiers. The result was distorted
signal on SSB, seems was a bit wider and modulation being raspy. It appears
that part of the "other" RF was picked up by other antenna and amp,
"processed" and retransmitted. I have observed this effect on one YU
station, alerted him to it, asked to switch one PA-ANT off, and signal
became "crystal" clean.
Let the "it can't be" games begin :-)

So it seems that if I want transmit the same signal in two or three
different directions- antennas, they should not "see" each other, or they
will interfere (until they go through atmo/ionosphere "massaging") and lose
their correlating identity?

Thanks Cecil and Walt!

73 Yuri, K3BU.us