I run an animated Christmas light show on the house, and that interferes with my garage door opener whenever the lighting electronics are on. The lights themselves don't have to be on, the problem occurs when there's data on the wire. The neighbors don't have any interference problems so it's pretty local to my house. The receiving antenna on the opener is the factory original piece of wire. I understand basic electronics and am good with a soldering iron, but I don't know much about RF.
Other: I built a quarter wave ground plane antenna for an FM transmitter and don't seem to have any interference problems in either direction. No problems pulling TV off-air either (US ATSC).
The opener runs at 372MHz and the data rate on the LEDs is adjustable on the controller and tends to work best at 800-900kHz.
My thought is to build a receiving antenna for the opener that favors 372MHz and then a bandpass circuit to reduce the noise. I've looked at various antenna designs and can find online calculators for element lengths, etc, but I really don't know which antenna design I need, nor do I know the bandpass circuit I'd need. Any ideas?
EDIT: It's not very clear above, but the lights are completely hard-wired, not wireless.