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Re: Patches and BB Grills



Hi Grant,

The dish would look solid at 2.4 GHz if there were
BOTH horizontal and vertical elements spaced around
1-inch apart.

You could also add aluminum screening. However, it would
still not be a good dish for circular polarization
Since the BBQ dishes are not symetrical and you would lose a
significant amount of gain.

Tony AA2TX

---


At 10:35 PM 9/14/2003 -0500, Grant Zehr wrote:

>Tony's answer seems correct...but has anybody ever tried it?
>
>If the grill elements are close enough together, there must be some point at
>which the dish looks "solid".  At that point a grill should perform much
>like a solid or mesh dish, even with circular feed.  If that's true, I
>wonder what that dimension is (for 2.4 gHz)?
>
>Just curious.
>
>Grant Zehr AA9LC
>
>----- Original Message -----
>From: "Anthony Monteiro" <aa2tx@comcast.net>
>To: "Albert Ozias" <alozias@worldnet.att.net>; "AMSAT" <amsat-bb@AMSAT.Org>
>Sent: Sunday, September 14, 2003 8:29 PM
>Subject: Re: [amsat-bb] Patches and BB Grills
>
>
> > Hi Al,
> >
> > The BBQ dish is linearly polarized so it does not
> > reverse the polarity. A patch would not be a good
> > feed for the usual BBQ dish because the e-field
> > pattern would be much too wide for the dish.
> > 73,
> > Tony AA2TX
> > ---
> >
> > At 04:55 PM 9/14/2003 -0700, Albert Ozias wrote:
> >
> > >Are patches usable and effective on BB Grills?
> > >
> > >Does the BB Grill reverse the polarity ( RHP to LHP ) similar to dishes.
> > >
> > >Thank you - Al
> > >----
>
>
>
>
>---
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----
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