We put a cheap 24" TV in the van for those odd occasions we may be in a service area, it came with an Antsig omni directional antenna (UFO looking thing ) and an 240V signal booster.
I tried tuning it in in the drive but cant get any usable reception, switched to some indoor rabbit ears and they work fine. Booster or no booster doesnt seem to make a difference so its possibly not working.
I want to get a 12V booster like this from Kingray - PIK170FDC - Kingray which will hopefully fix the lack of reception issue.