I think don't talk to much about it before reading the patent application WO
02/45210 A1 or PCT/NO01/00441. Inside there are links to other patents...
Cannot say more, must read it first.
One nice think about patents: You don't need to pay something for it if you
use it privately. Offering a device to others is not allowed. Just make your
own if possible (materials, construction, opened infos can make it
impossivble). Ideal for hams, electronics hobbyists.
My email address is real. Spam and Virus filtered.
Regards -
Henry


Stepan Novotill schrieb in Nachricht
...
On Wed, 17 Sep 2003 19:30:19 +0200, "Arie de Muynck"
wrote:

The old "Genie" garage door opener transmitters used a ferrite rod
antenna. It was very thick and short. Like an AA battery.
Then again, that was VHF/UHF to boot. I still have one in my scrap
pile. ....Stepan