[Elecraft] dipole antenna efficiency

[David Woolley]

John Magliacane wrote:
> 
> http://books.google.com/books?id=SNJhVlHGgC&pg=PP1&sig=qdNrli_UaJsiZB_gq3cRqvjy4DY#PPT961,M1
> 
> http://www.jampro.com/index.php?page=c-circularly-polarized-spiral-tv-antenna

Interesting, although it doesn't seem to be a compact antenna (each turn 
of the helix is several wavelengths) and the multiple helices appear to 
be there to achieve the radiation pattern and polarization, not 
performance (you don't use stainless steel for low losses).
-- 
David Woolley
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