You should therefore strongly consider grounding your attic mounted antenna by attaching a grounding block to the coaxial cable to shunt off excessive leaked current.
Grounding an antenna in attic.
From your description it sounds as if you may create a ground loop which may cause problems throughout the house.
Run a length of 6 jacketed stranded ground wire from whichever you installed there directly to your bussbar.
So there isn t any ground from the tv either to bleed off any voltage that might pass through the antenna.
It doesn t support what you want to do.
Exterior antennas must have their mounting rod grounded to provide electric discharge in the event of a lightning strike or static accumulation from other causes.
Then on a separate lug on the bussbar run jacketed stranded 2 ground wire outside and straight down the side of the house to a ground rod sunk at least six feet below ground eight feet would be better.
But first check the electrical plugs of the various devices attached to the tv line.
There are very specific requirements for grounding an antenna both via mast ground and a shield ground.
Stick to the building code.
The mounting rod is insulated from any of the active reception parts.
If you need to bend the ground wire make the bends as gradual and as smooth as possible.
Air movement in your attic should not pose a problem.
There is no requirement to ground an attic antenna in the national electrical code.