design technology in flat panel antennas?

Can anyone give me a summary and maybe diy references of the type of
designs that are used for these flat panel antennas sold by a lot of
companies? What do they look like inside? Are they completey
passive? Are they BiQuads, or something else? I'm curious.

thanks,

dave mcd

On Sat, 12 Jul 2003 00:56:09 -0700, "Don W."
<(E-Mail Removed)> wrote:

>This design looks very similar to a patch antenna I dismantled. The
>commercial antenna used a white, very high density foam or rubber separator
>between the ground plane and active element. The active element resembles a
>Marconi antenna. My commercial patch has a gain of 10.5 dBi.

Talking about antennas, my recommendation is the "Antenna How To"
maintained by Seattle Wireless. It can be found here:

http://www.seattlewireless.net/index.cgi/AntennaHowTo

The Howto gives a comprehensive description of all the different types
of Antennas out there.

Jacco Tunnissen
--
http://www.wardrive.net/
Wireless Networking Security
and Wardriving Resources

"Don W." <(E-Mail Removed)> wrote in message
news:c_2cnQlyeo2fIpKiXTWc-(E-Mail Removed)...
> "davemac" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) om...
> > Can anyone give me a summary and maybe diy references of the type of
> > designs that are used for these flat panel antennas sold by a lot of
> > companies? What do they look like inside? Are they completey
> > passive? Are they BiQuads, or something else? I'm curious.
> >
> > thanks,
> >
> > dave mcd
>
> This design looks very similar to a patch antenna I dismantled. The
> commercial antenna used a white, very high density foam or rubber
separator
> between the ground plane and active element. The active element resembles
a
> Marconi antenna. My commercial patch has a gain of 10.5 dBi.
>
> Don W.
>


Silly me -- I forgot to paste in the link to "This design"! Here it is:
http://devices.planet-wireless.de/comtelco/index.html

Don W.