AVR-Chat

On Wed, 04 Jul 2007 20:27:55 -0000
 "Richard Cooke" <rcooke@digitalwavelength.com> wrote:
> Hi Folks,
> 
> We need some help with a small hand held RF remote
> controller project.
>  We're willing to pay for the help.  Basically we need
> some help with
> the matching circuit from the nRF905 to a small helical
> antenna.
> 
> If this is an inappropriate post I apologize.  I don't
> know where else
> to ask.  
> 
> Richard Cooke
> rcooke@
>        digitalwavelength
>                         .com
> Lake Forest, CA USA
> 

Real helicals are sort of tricky. 

If you mean a helically-shortened dipole (aka "Rubber
Ducky"). they are generaly designed to appear as 50 ohms at
the connecctor. This allows a standard matchning network to
be used.

So, the matching network is tailored to what you have or
what you want to use. That has to be defined first.

Jim Wagner

---------------------------------------------------------------
The Think Different Store
http://www.thinkdifferentstore.com/
For All Your Mac Gear
---------------------------------------------------------------