i have to say no to this idea but your thinking in the right area. maybe it could be a small turret type for missiles. i think a active module that work similar to the active scanner but it jams radar and swarm launcher lock, same range with an active time of 30 seconds with a cooldown of 45 second and a limit of one to be fitted

Honestly some type of counter measures would be nice. Maybe a 'flare' launcher of sorts, maybe with its own skill, say 5% effectiveness per level, with the base effectiveness of the module being 25% - 35% based on meta level. Probably would be best to be active, not sure on the ratio on active time versus cool down.

Basically to stop so many swarms/AV nads. Say six missiles from a swarm launcher gets fired at you, with level 5 skill best meta item, would stop 60% of the missiles from hitting. Just throwing this out there.

An active 'jammer' module to prevent locks would be good.

To the OP: No, that's overpowered. The primary infantry have against HAVs is their ability to get into cover that HAVs can't get around. If you can fire over or around that, then infantry get stomped even harder.
Lots of new AV ability is all well and good, but there are only so many people who are going to use AV in the first place, whereas if something like this was a secondary module, every tanker would use it.