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Antenna reception theory
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December 5th 05, 05:11 PM posted to rec.radio.amateur.antenna
Asimov
Posts: n/a
Antenna reception theory
"Richard Harrison" bravely wrote to "All" (05 Dec 05 08:08:30)
--- on the heady topic of " Antenna reception theory"
RH From:
(Richard Harrison)
RH Xref: core-easynews rec.radio.amateur.antenna:220833
[,,,]
RH There is an initial wavefront. It started as a spherical wavefront but
RH has traveled so far that for practical purposes it is now a plane
RH wave. In the wavefront there is an electric force which would attract
RH or repel electrons but it has the same strength everywhere over the
RH arriving wavefront. Therefore, wlectrons in a wire parallel to the
RH wavefront are not moved along its length by the electric force. This
RH force would only tend to move electrons from one side of the wire`s
RH diameter to the other side of the same diameter. Our interest is in
RH current along the length of the wire.
[,,,]
There is a time varying voltage gradient in the E field too. Turn the
wire around 90" then to find the E gradient. If the wire length is
such that one end is positive while the other end is negative then
charges will flow inbetween both ends.
Anti-static spray won't work on an antenna.
A*s*i*m*o*v
.... My wife and I always hold hands. If I let go, she shops.
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