How’s this for a design concept.
An autonomous drone, built on the cheap, carrying a single high speed heat or radar seeking missile. The drone is launched in the general direction of the enemy, where it will loiter while the missile seeks a target. Once a target passes in front of the seeker head of the missile, it fires, and the drone falls to the ground.
The entire system should be engineered to be as inexpensive as possible. Since it is entirely disposable, it should be possible to keep the cost down to $5K a copy. For the cost of one JSF, South Korea could deploy 60,000 fire-and-forget drones.
A well-warranted fear - I've seen Raptors "battle" F-15's above Okinawa - it's a fearsome sight.