Can a hybrid Surface to Air Missile, UAV loiter for hours and then become a missile to down an enemy aircraft?

Small UAV surface to air missile (SAM), which is air-breathing is a good idea and yields many possibilities to the future of air combat.

http://www.shephard.co.uk/UVOnline/Default...6a-10526cb81f17

Now we need to design a beyond line of sight (BLOS) radar single unit to work without any other help. A net-centric battlespace component, which can operate completely autonomously without the help of satellite communication, AWACS or any other source. This BLOS radar unit can be mounted on a ship for the Navy or trailer for Army or Marines, well then such a single mission UAV, or kill projectile would be one excellent tool. Shoot it, forget about it as it will find its target eventually, even if it has to dog fight it's intended victim.

An incoming force of a hundred Chinese fighters would have to try and dog fight a hundred UAVs, which can pull 18g's as apposed to the manned modern fighter plane of 8-9 G