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Old March 25th 08, 06:08 PM posted to rec.radio.amateur.antenna
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Default Antenna physical size

On Mar 25, 12:36 pm, (Richard Harrison)
wrote:
Art wrote:

"If Kraus said "The radiation is perpendicular to the acceleration" then
the book is worthless."

Art scoffs at Kraus and Art scoffs at experience with antenna
orientation for best reception. So that readers aren`t mislead, olease
refer to page one of Terman`s 1955 opus:

"---radio waves. travel with the velocity of light and consist of
magnetic and electric fields at right angles to each other and also at
right angles to the direction of travel." Then check page 923:

"--- E is the field strength of the wave in volts per meter, Psi is the
angle between the plane of polarization and the wire in which the
voltage is induced" ---It will be observed that the quantity E cos Psi
cos theta is the component of the field strength which has a wavefront
parallel to the antenna and is polarized in the same plane as the
antenna."

He who scoffs at Terman is at great peril.

Best regards, Richard Harrison, KB5WZI


But ham radio and the Navy have proved him wrong with the T2FD
testing !
Computor programs designed around Maxwell's laws also prove him wrong.
I suggest you study the under pinnings, if any, by Terman of that
particular point
and then share the "proof" with all of us. Again, you have two vectors
for the
electric and magnetic field at right angles to each other. Using your
own brain
please tell as where the curl vector MUST be to prove your case.
Ofcourse you can
read a lot of books and select a diagram of the vectors involved that
solidifies your position
but I don't think you will find one anywhere. Your HIT and MYTH
aproaches just doesn't work out.
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Old April 8th 08, 10:37 PM posted to rec.radio.amateur.antenna
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Default Antenna physical size

Art wrote:
"But ham radio and the Navy have proved him (Terman) wrong with T2FD
testing."

Art has likely tried a VHF or UHF antenna by rotation within a linearly
polarized wavefront. If so, he has experienced cross-polarization and
noted about 20 dB loss when cross-polarized in the field.

My WW-2 navy ship used a Marconi (inverted L) antenna for HF
communications with a Collins TCS. A signal reflected by the ionosphere
gains random polarization in the process. The vertically polarized
Marconi does well with a ground wave over short distances even at HF
over sea water. We had no slopers. The VHF and UHF antennas were all
vertical whips to cover all azimuths. Art`s inclined antenna is in
general a myth.

For rntertainment, we had a broadcast receiver called the RBO. It too
used a Marconi antenna as all medium wave broadcasts are launched from
vertical antennas. It worked well as would be expected of a broadcast
receiver.

Best regards, Richard Harrison, KB5WZI

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