Hi I was trying to build an automatic defense system using antiballistics turrets and radars. Radars don't help a lot when they just five a Redstone output . You can fix that by adding a new setting like enable Redstone if the missile/player goes closer than (number) blocks or if you want to be more specific add a block that extends it and say like if there is one target output there if two there .also you could add a configuration on the radar block for the player to specify where he wants it to put put and what

Redstone output is based on proximity (by default, at least) so you can easily trigger stuff like ABMs by simply spacing out your redstone line.