Shoulder Launched, Man Portable Laser Anti-Aircraft or SCUD Missile Defense System

Is it possible to replace our Patriot missiles in the battlespace with man portable laser weapons with in the next three to five years? Can we make these a shoulder launched or easily transportable to set up on a temporary stanchion and ready to fire at will? Can we use compressed gas canisters for the chemical laser system of the defense weapon? If so would these be less weight and more bang for the luggability for the men carrying these units into the battlespace? Would it be better to simply mount the system into a fast moving robotic Sandia Labs