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Old September 17th 09, 12:33 AM posted to rec.radio.amateur.antenna
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Default Spherical radiation pattern

Richard Clark. KB7QHC wrote:
"Several were astonished (as I have already mentioned) to find that his
antenna design had reflector (the new and improved model had two)
elements that were shorter than the driven element and the director
elements longer."

Of course no one could prove for Art how his antenna worked. They
weren`t gifted with his type of genius.

As Terman says on page 906 0f his 1955 opus:
"The fact that a parasitic antenna placed close to a radiaring antenna
can be used either to reflect or to direct the radiated energy can be
taken advantage of to obtain a compact directional antenna system. A
simple example is shown in Fig. 23-39 where the reflector length is such
that it is resonant at a lower frequency than that being transmitted,
while the the director length is chosen so that it is resonant at a
higher frequency than is being transmitted."

Most everyone in this newsgroup has tried the classic Yagi arrangement
and knows that Terman has it right.

Art`s patent does not prove Terman wrong.

Best regards, Richard Harrison, KB5WZI

 
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