[Lowfer] Loop antenna question

[Bill Ashlock]

Craig,

I you are talking about a horizontal loop at LF (the plane of the loop parallel to the ground) the answers is "yes", I have tried one. The performance was very poor, however. The problem is that the current flow surrounding the loop conductor is 100% into the ground. Think of a donut of current surrounding the loop. When the plane of the donut is vertical to the ground some of the current flows into the ground but the greater share flows into the space surrounding the loop and produces useful radiation. Same problem with a horizontal dipole at LF; all the useful radiation is short-circuited by the ground.

Bill

> Date: Thu, 30 Sep 2010 17:13:04 -0400
> From: craig at wasson.com
> To: lowfer at mailman.qth.net
> Subject: Re: [Lowfer] Loop antenna question
> 
> I'm just curious - has anyone tried a horizontal loop?   It seems that with
> such a small antenna radiation would be isotropic anyway, and construction
> would be much simpler.
> 
> Thanks!
> 
> Craig - N6IO
> 
> (Beacon IO off the air for antenna modifications)
> 
> 
> 
> On Tue, Sep 28, 2010 at 11:26 AM, John Andrews <w1tag at charter.net> wrote:
> 
> > J.B.,
> >
> > A "small" loop in the vertical plane will produce a vertically-polarized
> > E-field (in the far field) regardless of where it is fed. The important
> > thing is that the loop is vertical (i.e., not parallel to the ground).
> >
> > John, W1TAG
> >
> >
> >
> ______________________________________________________________
> Lowfer mailing list
> Home: http://mailman.qth.net/mailman/listinfo/lowfer
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Lowfer at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html