check this out: http://home.wanadoo.nl/erwin.gijzen/wifiswr/
Also, look for another DIY SWR meter. I can't find it now, but all it
takes is a microwave diode and you get DC, which you amplify later and
get a nice DC reading.

hjf


On Fri, 04 Feb 2005 11:36:31 -0500, Marc Nicholas <marc@geekythings.com> wrote:
> That's what prompted the question -- there must be a relatively simple
> tunnel diode circuit that can be used. But there's no technical details or
> schematics on that site.
> 
> I also thought about using one of MAXIM's tiny (TSOC or SOT23) ISM band
> downconverters, and then smoothing out their still AC output with
> rectifier/caps.
> 
> -marc
> 
> 
> On 2/4/05 10:59 AM, "Alex Harford" <harford@gmail.com> wrote:
> 
> > On Fri, 04 Feb 2005 10:47:56 -0500, Marc Nicholas <marc@geekythings.com>
> > wrote:
> >> Can anyone give me some guidance on a *simple* circuit for detecting 2.4Ghz
> >> microwave (Wifi etc.) and providing DC output? It wouldn't have to be
> >> terribly sensitive and I'd prefer it to be pretty passive :-)
> >
> > There was just such a project on Slashdot yesterday:
> >
> > http://neil.moon-beam.com/users/kris/index.htm
> >
> > Alex
> 
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist