[Antennas] Vertically Polarized Loops [was: Antennas digest, Vol 1 #17 - 7 msgs]

[Doc]

Hey Jim,

  I think this is for you ... orthogonal radiation is getting a bit out of
my league!  Take a gander at these sites ...

http://cdfinfo.in2p3.fr/~kaplan/Matrixpol/node10.html
http://www.vlf.it/rdfsoftware/rdf.html

   Here is an interesting discussion of the competing values of
linear (flat) and circular polarized antennas when the signals to
be received may vary in polarization (e.g. a handheld held vertical
or horizontal or a HF op switching between a vertical and a
horizontal antenna to test propagation).  Seems circular is often
more versatile. http://www.cushcraft.com/support/antenna2.pdf

   And another somewhat practical article ... if you can understand
it ... I glazed over ... http://www.comcar.de/papers/AP2000.pdf

   I'm just an NVIS guy for the purposes of emergency communications,
and the rest is VHF & UHF ... but if you do pursue the orthogonal
radiation things my curiousity would love a summary explanation!

   Here I am, trying to get to bed, and he has to throw orthogonal
radiation at me ... what's a geek to do ... I just had to know!

73, Doc  KD4E

> From: "W2WU" <w2wurjj@verizon.net>
> Doc:
> Read J. Kraus: "Antennas," Kraus: "Electromagnetics",  Jasik: "Antenna
> Engineering Handbook" Consider orthogonal radiation.
>
> > A loop with vertical polarization is just a horizontal loop fed on
> > its side, no magic.
> >
> > Now if your have the loop in the horizontal plane, laying flat, I
> > am not certain you can cause it to radiate vertically, unless
> > perhaps you treat part of the feedline (traveling vertically at a
> > right angle to the loop) as part of the antenna, then you might
> > get some vertical polarization.
> >
> > You'd have to ask L.B. Cebik about stuff like that!
> >
> > Lots of great stuff here and elsewhere on the W4RNL site:
> > http://www.cebik.com/fdpl.html
> >
> > Here is a specific example of a "quad" (square or round matters
> > little) and how to move the feedpoint to alter the polarization:
> > http://www.softcom.net/users/kd6dks/quad.html
> >
> > You might also treat such an antenna as a "delta loop".  Chapter 4
> > of "Practical Wire Antennas" by John Heys, G3BDQ, contains an
> > excellent discussion.
> >
> > Have fun and share what you discover!
> >
> > 73, Doc  KD4E
> >
> > > I was looking at the loops on a web site somewhere & was interested
but
> > > they said a loop is horizontally polarized & I want vertical. I
couldn't see
> > >  if there was a way to make it vertically polarized or not. If you
know how
> > > I'd appreciate the info.
> > > Thanks
> > > Jim
> > >
> > > > Why not a folded dipole in more of a loop form?
> > > >
> > > > Hmmm.  I have some copper tubing, I have to try that and see how it
> > > > works ... self supporting and rotatable too!  :-)
> > > >
> > > > 73, Doc  KD4E