[time-nuts] Quadrifilar Helix Antenna

[Azelio Boriani]

Of course one of the most challenging part of the EM simulators is
preparing the correct model of the structure you want to simulate.
Unfortunately (for me) I'm mostly a try-it guy rather than simulate-it so I
prefer to build and try with test equipment. My first QFH was too high in
frequency (GLONASS-ready?) so I have to build another one.

On Sat, Jun 9, 2012 at 4:11 PM, David Kirkby <david.kirkby at onetel.net>wrote:

> On 8 June 2012 09:31, Raj <vu2zap at gmail.com> wrote:
> >
> > I came across this article. I dont understand Italian!
> >  From RadioKit Elettronica 2003-03
> >
> > https://dl.dropbox.com/u/10377704/IV3QBN%20QuadHelix.pdf
> >
> > Cheers
> >
> > --
> > Raj, VU2ZAP
> > Bangalore, India.
>
> I'd be interesting in trying to see some simulations of this in a full
> wave 3D electromagnetic simulator like HFSS from Ansys, FEKO, EMpro
> from Agilent etc. I currently have a trial license for Agilent's
> EMpro, but don't feel confident in trying this antenna. I would have
> been a bit happier using HFSS, but don't have a license for it.
>
> Maybe one of the much cheaper NEC based programs coud do this, though
> I'm not so sure I'd trust the results, whereas I would from HFSS.
>
> HFSS (which costs a small fortune), comes with a free antenna design
> kit. That is able to design a Quadrifilar Helix Antenna, but needs a
> ground plane, so has a very different radiation pattern to this.
>
> Dave
>
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