The beam would need to be strong enough to fry the electronics, not just disrupt the data link. That’s why I suggested 100kW or so.
But what do I know haha?
A narrow beam microwave weapon does make a lot of sense. Recall that the EA-6B Prowler (the radar jammer before the EA-18 Growler) had a canopy with gold particles embedded in it to form a sort of Faraday Cage to keep the 4-man crew from getting cooked by that big emitter on the vertical stab. Always wondered if the crew wore radiation dosimeters like nuke boat crews?