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