I'm working on a open-hardware wireless wind sensor. It's designed for being installed on mountains, where thunderstorm are quite often. I use a Si4461 RF chip, with a half wave whip antenna.
My problem is the following :
We had several big thunderstorms last week. And every time, I got several sensors dying at the exact time the thunderstorm was here.
Only the RF chip is dead. The other components looks undamaged.
It seems like to be because the antenna is picking-up static electricity from the thunderstorm.
So my question is : how to protect the RF chip from thunderstorms ?
I've been told that an « ESD suppressor » like this could do the job : http://www.mouser.fr/ProductDetail/Cooper-Bussmann/0603ESDA-MLP7/?qs=/ha2pyFadug/ksZDRDWi4cQDcjEmIJ07mgZKTEB3xPvlqKzTt8q7CA==
Someone else told me about using a choke and a TVS diode.
This device is battery powered in a plastic enclosure. Grounding will be difficult.