[Antennas] J pole horizontally polarized antenna

[NA4FM (Buck)]

Look for "Halo Antenna" on google, you will find many including the
original patent.

Buck
NA4FM

> -----Original Message-----
> From: David W Sher [mailto:davew9lya at juno.com] 
> Sent: Thursday, June 10, 2004 3:53 AM
> To: na4fm-list at towncorp.net
> Cc: dan.peek at 3abn.org; antennas at mailman.qth.net
> Subject: Re: [Antennas] J pole horizontally polarized antenna
> 
> 
> Conventional dipoles (and J-poles, horizontally oriented, are 
> not omnidirectional.  Back 40-odd (and I do mean odd) years 
> ago, there used to be Halo antennas (essentially dipoles bent 
> into a circle) for various VHF & UHF bands, normally for 
> mobile use with horizontal polarization. 
> These were commercially available and construction details 
> were also available in the ARRL Handbook and VHF Handbook.
> 
> Dave              W9LYA
> "What wrought doG hath?"
>  
> On Thu, 10 Jun 2004 02:37:09 -0400 "NA4FM (Buck)" 
> <na4fm-list at towncorp.net> writes:
> > Just fold the 1/2 wave vertical element horizontal and 
> leave the 1/4 
> > wave matching stub vertical, or lay the antenna horizontal.  I have 
> > considered cophasing two j-poles horizontal to see how that works.
> > 
> > Buck
> > na4fm
> > 
> > > -----Original Message-----
> > > From: Dan Peek [mailto:dan.peek at 3abn.org]
> > > Sent: Tuesday, June 08, 2004 10:07 AM
> > > To: antennas at mailman.qth.net
> > > Subject: [Antennas] J pole horizontally polarized antenna
> > > 
> > > 
> > > I have been asked to construct an antenna for a small
> > > community TV transmitter somewhere in Africa on our channel 7 
> > > (174-180MHz). The J pole or super J pole looks like a good 
> > > candidate, but I believe it is vertically polarized. Is there 
> > > any way to make it horizontally polarized (or elliptical for 
> > > that matter)? Any way to electrically adjust the down tilt? I 
> > > am considering using soft copper tubing of ½” or 5/8” so it 
> > > can be rolled up in a suit case and carefully straightened 
> > > out on arrival. Any thoughts or suggestions would be 
> > > welcome--other antenna types, calculation software, 
> > > construction ideas, etc.
> > > 
> > > Thanks,
> > > 
> > > Dan Peek N4FAA
> > > Dan.peek at 3abn.org
> > > 
> > 
> > 
> > - - -
> > 
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