In this case, Lester, they said in the article that it was high power microwaves. That's a lot of information. We know how microwaves behave, know all the various antenna designs, and can speculate on how much power will need to be in the bain beam of the antenna. We also know the main goal in a system like that. It has to deliver a big enough EM field to induce destructive voltages in the target equipment.
Like all things like this, the devil is gonna be in the details. I'm just thinking the bulk of the design has nothing to do with a ton of new technology. I'm sure it took a lot of engineering time to make it work. I'm just speculating that the payload section is gonna be real close to a RADAR transmitter on steroids. In my day, they smacked a magnetron with a bigass pulse, and called it a day.