Oh, I have a better idea then, it could spam trooper blips, maybe even put them on a rotation or random movement so they help conceal the real blips, that would make radar much harder to use, even if it doesnt block player blips. I think an area of effect jammer, realistically, should affect both teams, then you would have to be more careful about where you put it. Another way it could be done is by making a huge blip that covers all the rest of the blips in the area on the minimap.

That probably wont be necessary though, because I read somwhere that the decoy actually removes your blip as long as you stay within a  certain distance of it.